Sniper efi timing curve If sniper is commanding the timing, then it probably is, and we need to fix it in the tune. ) • Click Save Sep 5, 2020 · Hi Guys, was hoping you may be able to help me, i know its a big ask but i too have gone down the Holley Road - (and i have no experience at all) I was after some help with timing curve, i have been talking a lot with the guys on the Holley forum and they have been very helpful where they can, but most don't understand boats, and as far as I'm Mar 11, 2020 · RPM, MAP, MAT, TPS, CTS, IAC, Target AFR, AFR Left, CL Comp, Ignition Timing, Duty Cycle, Fuel Flow, Fuel Pressure & Battery. Handheld defaults to 15 degrees at idle 36 degrees at Sep 1, 2020 · The program will calculate a timing advance curve after you input all the specs. If I were you,for now, I would set the total at 35-36deg. 5” TSLCD. Oct 26, 2020 · Originally Posted by Danny Cabral The Target Air/Fuel Ratio Table & Base Fuel/Timing Table (and MAP kPa & RPM axes/scales) should be configured using the Sniper EFI software: In the Sniper EFI software (), Target Air/Fuel Ratio Table (Fuel ICF) & Base Timing Table (Spark ICF), select "2D Table" Type (not "Simple"). 2 months ago, I upgraded to a Holley Sniper EFI setupalso a throttle body type, but still ran mechanical timing(if it ain't broke, kinda thing) Decided to allow the Holley to control timing. Sep 28, 2022 · I have it at 35 deg. This creates a digital +12V square wave that you feed to Sniper, which then modifies the timing as desired and fires the coil itself. I have a Windsor based 347 stroker from BluePrint with a Holley Sniper EFI Trottle body EFI. 8 a/f and 35 degrees of timing at wot. On the Sniper handheld you can set a Static Timing Set value for temporary testing. I'm newer to the forum and also to Sniper EFI. May 26, 2021 · Sniper EFI Tuning & Tech. 050 Int: 248°, Exh: 254° Does anyone have the stock HyperSpark timing curve in graph form? RPM on the X axis and advance on the Y axis. Dec 7, 2018 · Whether you are adding ignition timing control to an existing EFI setup or building a new EFI System configuration, there are two ways to set up your timing: Using the Simple method (where you specify just four different timing values and the ECU extrapolates the curve) or the two-dimensional ignition table (where 961 timing values are specified across a range of engine speeds and manifold Dec 14, 2020 · C3 Tech/Performance - Ignition timing control with Sniper - I'm about to install a Sniper and was curious if anyone had installed one without the ignition timing control and then later installed the timing control. lbs. It worked very well. Setting the timing on your engine is one of the most misunderstood adjustments, the information on these pages will help you understand and answer all of your questions about ignition timing. I like the Holley systems (not Sniper). Nov 1, 2023 · Hey guys. Jan 7, 2019 · I show you how to adjust your holley sniper efi, or holley efi hyperspark timing table to be more smooth than to have sharp edges. If you give it a commanded 20° of advance, with a timing light you will set your distributor so that you have 20°. Here's a great article on how to get yourself pointed in the right direction Mar 13, 2019 · This is a post documenting my Holley Sniper EFI install. Your motorhome project has lots of possibilities for tuning while driving. Let the Sniper "Learn-in" your Base Fuel Table. Download the Sniper EFI software (). zip (33. CHOOSING AN ADVANCE CURVE The function of the advance curve is to match the ignition timing to the burning rate of the fuel and speed (rpm) of the engine. The distributor times at 8*BTDC and all values in the table are without the 8* base added to them. These values can be viewed by pressing Monitor from the main Sniper EFI menu. 5 and WOT at 12. I am trying to learn more of how to fine tune the Jun 28, 2017 · replacing the the engine in my c10 with a l31 vortec crate engine with Edelbrock performer intake, sniper EFI, and MSD pro-billet HEI. 95 Holley EFI 553-111 12. This is the base timing table for the Sniper EFI system that I have. engine is a new GM longblock L31-r vortec. When the engine is idling, use this function to set the timing to 15° or 20°. Chasing that down I opted to start playing around on the laptop with the Holley EFI software and with the help from guys on the EFI forum I've been able to get the A/F tables and acceleration Aug 20, 2019 · I am attaching the advance curve in the 5. Holley Help videos has one showing building a Timing Curve from scratch here: How To Build A Custom Timing Table - Sniper EFI. I ran into a deal on a slightly used Sniper dual quad setup. Oct 22, 2021 · "Idle Timing Control" is used to stabilize the idle speed, the timing is rapidly adjusted by the Sniper ECU to limit RPM excursions from the target idle speed. The sniper will control the spark to get the smoothest idle. The engine has a 240° @ . ). Anyhow, the timing curve MUST not start till just above the idle speed, smooth and steady and all in by 2800-3200rpm's is soon enough for most of these combo's. I was interested to know if I can advance it more based on how it looks and from experience. Jan 25, 2021 · RPM, MAP, MAT, TPS, CTS, IAC, Target AFR, AFR Left, CL Comp, Ignition Timing, Duty Cycle, Fuel Flow, Fuel Pressure & Battery. Aug 14, 2018 · And, making this a big more of a challenge, the installation instructions for these ignition systems provide no guidance on how to identify and transfer the current timing curve to the new ignition. total. 623" lift/114° LSA H/R camshaft, TFS R-Series FTI Comp Ported intake, BBK 80mm throttle %PDF-1. '92 Ford Mustang GT: 385"/6. Even Holley said either their tank or Tanks would work just fine. Theoretically, you can put those values to whatever you want whenever you want. May 10, 2020 · Folks to this day still buy into the BS that you need all the timing in at 1500-2000rpms, which makes it difficult if not near impossible to keep some of the curve out at idle speed. 5" TSLCD Static Timing function. My biggest questions are about timing and AFR though also fuel. Install the throttle linkage to the Sniper EFI throttle body. 623" lift/114° LSA H/R camshaft, Trick Flow R-Series FlowTech Induction Comp Jun 12, 2023 · 7) Sniper EFI Idle Setting/Throttle Blade Setting (Holley Sniper EFI Quick Start Manual): Once the engine is up to operating temperature, the idle speed can be set to what was configured in the Wizard. The MAP sensor delivers instant information to the ECU concerning the engine’s manifold pressure when used in conjunction with the IAT sensor and engine speed, and this information helps the system to calculate Aug 11, 2017 · The Sniper EFI System will absolutely work fine in your rock crawler, Todd. It also means that all your tuning, including timing "curve" can be done in the computer, noting that timing no longer needs to be a curve and can now be customized completed to your engine and drivetrain configuration. com You set the timing curve up based on engine rpm, equivalent to mechanical advance, then add additional timing based of Manifold Absolute Pressure (MAP), which is effectively vacuum advance. Oct 24, 2020 · Sniper EFI Tuning & Tech. You will need an ignition control for the Atomic TBI to control timing. Feb 23, 2020 · 3. When i rev the engine; the timing Mar 23, 2019 · I have been researching advance curves for economy for a hot rod project with a Sniper EFI. Seems to me if you add 1 degree of timing to every value, in every map, electronically, you just did the same thing as adjusting your rotor 1 degree. 73s Jul 26, 2017 · Does not change timing like you normally think about changing I guess, but it does, just globally. See post # 4 above. Please be aware that this is a community forum. Your normal Idle Timing is "looked up" by the ECU in your Base Timing Table like any other portion of your engine's load/speed curve. I hope someone can help figure out what is going on with the Sniper and can help me fix the issue. Other end of cable connects directly to the Sniper EFI Throttle Body Micro SD If you are using the Holley Sniper EFI system to control ignition timing, Prestige Motorsports recommends two additional steps you should take to verify timi Apr 22, 2013 · After I got my advance curve worked out, and my Weber 38 tuned, my 258 would rap out to 4K, comfortably. Always start somewhat rich. 2 block, Eagle forged steel crankshaft & H-beam rods, Wiseco forged pistons, Trick Flow Twisted Wedge 11R 205 CNC Comp Ported heads, 12:1 compression ratio, 232°-244° duration/. Jun 13, 2020 · Well, I was not aware that we had to adjust timing ourselves. I have never screwed with timing curves for low compression vortec heads. So when I installed the Sniper initially I ran it this way, maybe a couple of months. When the fueling is OK, then tweak the Base Timing Table. Later, we add some timing in the idle and drivability areas to improve the burn of the mixture, improve fuel economy, lower exhaust temperatures, etc. Except for the Sniper EFI software, the Base Timing Tables in the base calibrations (Terminator, HP & Dominator) are better than the typical centrifugal/vacuum advance curves. I have the Holley Sniper EFI 4150, with the controlled timing Hyperspark ignition. We are at 5,500 ft Sep 29, 2021 · I would start by changing to "simple" timing settings, go 15 initial, 40 cruise and 36 at WOT, also may want to consider crank at 15 As far as fuel, I'd also go with simple, vs table, and put idle at 14. The timing curve will need to be created in the MSDView software for the MSD 6014 LS Ignition Control. Jun 3, 2021 · Do like AndyF suggests, create a simple Spark Table around the initial (15-20°), cruise (42°) and WOT (34°) spark advance settings. As for vacuum advance, a good high performance advance curve mimics the old delco vacuum advance on the L79 327, LT1 350 and L82 350. Then I spent about $85 for new fuel line and fittings to hook it all up to my Sniper EFI. Feb 6, 2022 · I’ve just had installed a complete sniper EFI kit, with their distributor and spark module. 6L 2v Ford engine- that has been converted from factory EFI to Sniper EFI for aesthetic reasons. Boost Table coming soon! The Target Air/Fuel Ratio Table & Base Fuel/Timing Table (and MAP kPa & RPM axes/scales) should be configured using the Sniper EFI software: In the Sniper EFI software , Target Air/Fuel Ratio Table (Fuel ICF) & Base Timing Table (Spark ICF), select "2D Table" Type (not "Simple"). 9. DO NOT USE the Sniper EFI ignition box that comes in the whole kit deal. Usually, I found myself shifting at around 2500 RPM, with 2:73s and 32"s. Set up initially with the base timing with MSD dizzy timing curve and will switch over the the Holley timing control by locking out the dizzy and setting up the ecm to control timing. and let the program lean it out. 623" lift 114° LSA H/R camshaft, Trick Flow R-Series FlowTech Induction Comp How to build a basic startup timing table for Naturally Aspirated applications. Jun 24, 2018 · Also, you can look up Megasquirt Timing Table generator, there are couple of websites that do it for you, not sure if the format works with the Sniper, but another option Looking forward to seeing Sniper format, hopefully you have option to post it May 19, 2020 · Sniper EFI Tuning & Tech. 3. I am putting my sniper on a 1999 4. You can also pull timing under boost if you have some sort of forced induction. May 17, 2024 · HOWEVER, THIS TIMING CONVERSION FILE FROM VACUUM TO MAP(KPA) IS GOLD. Apr 12, 2024 · I am running a sniper with timing control, MTF3 cam, stock E7TE heads, stock EFI intake, stock exhaust maifolds, stock . With the vehicle in neutral, adjust the idle screw until the IAC Position reads between 2 You can run Sniper without timing control but it's going to work better when it's able to control timing too. May 17, 2024 · The timing tool generator MSExcel converter linked below SAVED THE DAY. I'd like to adjust the timing curve the most as it's a very short, very steep curve going from 15 May 30, 2019 · RPM, MAP, MAT, TPS, CTS, IAC, Target AFR, AFR Left, CL Comp, Ignition Timing, Duty Cycle, Fuel Flow, Fuel Pressure & Battery. Jun 4, 2023 · Hi. There's a timing value that appears in the logs, but it's what the Sniper thinks it should do if it was controlling the timing, but the numbers are meaningless. 3L SBF, Dart SHP 8. The basic inputs of idle, cruise, and wide-open throttle timing can be initially input using the handheld programmer, but the Sniper 2 also offers the ability to configure the entire ignition curve using a laptop. To my knowledge, there is no aftermarket EFI fuel system suited to fuel the Sniper EFI system that exists on the market. Jan 2, 2017 · It was my impression that the only time you could retain the stock ignition is if it were from an non-EFI car that didn't rely on the same sensors used by the Sniper ECU. 200" forged pistons, Trick Flow Twisted Wedge 11R 205 CNC Comp Ported heads, 12:1 compression ratio, 232°-244° duration . Sep 1, 2017 · Did the edlebrock intake MSD 8360 and the Holley Sniper EFI. Phase 2 install MSD EFI 6 Ignition (MSD-6415) with Holley Dual Sync Distributor (565-111) with timing control I have been looking at the Sniper EFI 4150 Super Sniper 1250 for my engines. Feb 19, 2021 · Here is a summary of several months worth of installation phases and problem resolution: EFI and electronic ignition conversion on a 1970 Cougar XR7 351C-4V w A/C Phase 1 install Holley Sniper EFI (#550-870) w/ Holley OEM In-tank fuel pump (12-305) replacing a Holley 4160 carburetor. Unzip the program below, and save the MSExcel program. But not sure what all else i need/should upgrade to support it. I don't currently have a computer to tune with, but the settings I have seem to be doing ok. Current engine spec. You may have to register before you can post: click the register link above to proceed. Not bad! May 26, 2021 · Holley Sniper EFI, Sniper Distributer for ease of use with Sniper EFI timing control. Looking at my Config File you'll see that I have created a timing curve following some tips from Holley as the basic timing curve that these systems come with are pretty basic. Using the Holley EFI software (LINK), look at where the live cursor moves to during this occurrence, and manually tune that area of the Base Fuel Table (enrich or lean) & Base Timing Table (optimize ignition timing). Yeah, it was good to have a high initial timing setting. I thought that the Sniper "Learn" timing as well, as everything is advertised as complete timing control by the Sniper EFI unit. It basically took the timing map I had developed over years with a HEI, adjustable vacuum advance and timing curve kits for the mechanical advance (springs & weights) on my old distributor, and mimicked them in the Sniper EFI computer. Jul 13, 2022 · Sniper EFI Tuning & Tech. “The distributor produces a stout spark output for engines up to 450 horsepower and thanks to the unique Holley phasing cap, the EFI sync signal and timing of the engine is easy to set up. I contact BULLET and they can’t advise because of the controlled timing and EFI, but did suggest 18 intial with a carb. Most idle numbers are more than what a non-controlled ignition are higher, for example, 16, 18, or even as high as 24-26 degrees. Example: 10° Initial + 25° centrifugal = 35° Total Timing. Cam: Lift . Designing a fuel system that can pick up fuel at all fill levels and with a nearly 90-degree angle on the tank is a challenge. When you get the parts to use the Sniper to control the timing, you can create a custom timing curve with the laptop software. Apr 19, 2020 · Usually, 30-34° is what mild SBF's like. 6 %âãÏÓ 2633 0 obj > endobj 2642 0 obj >/Filter/FlateDecode/ID[7C68EDBAAF304640BEAC554A1BFFEF43>137AFA2CB1B56A4FB91E2CC1B91AE13D>]/Index[2633 17]/Info 2632 Oct 29, 2023 · RPM, MAP, MAT, TPS, CTS, IAC, Target AFR, AFR Left, CL Comp, Ignition Timing, Duty Cycle, Fuel Flow, Fuel Pressure & Battery. Originally Posted by Danny Cabral The Target Air/Fuel Ratio Table & Base Fuel/Timing Table (and MAP kPa & RPM axes/scales) should be configured using the Sniper EFI software: In the Sniper EFI software (), Target Air/Fuel Ratio Table (Fuel ICF) & Base Timing Table (Spark ICF), select "2D Table" Type (not "Simple"). It takes extra time to get it right, but it's 100% worth it. ” May 25, 2019 · Originally Posted by Danny Cabral The Target Air/Fuel Ratio Table & Base Fuel/Timing Table (and MAP kPa & RPM axes/scales) should be configured using the Sniper EFI software: In the Sniper EFI software (), Target Air/Fuel Ratio Table (Fuel ICF) & Base Timing Table (Spark ICF), select "2D Table" Type (not "Simple"). Just now getting more familiar with looking at the tables on the computer. 470" forged steel crankshaft & H-beam rods, Wiseco 4. 7 Marine module. I thought you could set the start and end rpm of the timing advance but you can't. Using the Holley Sniper EFI software (LINK), look at where the live cursor moves to during this occurrence, and manually tune that area of the Base Fuel Table (enrich or lean) & Base Timing Table (optimize ignition timing). 8 or so. ” Apr 30, 2018 · 2. My 72 351C engine has a moderate cam, iron heads, air gap intake. If you want timing control, the Sniper needs to know where TDC is. If you should ever flood the engine you can floor the throttle, hold it there, and then crank the engine. May 10, 2018 · "It is HIGHLY suggested that a timing map using the Sniper EFI PC Software is built for the particular engine the Sniper EFI is controlling timing on. So compare timing at idle and, say 3000 RPM. 050" hydraulic roller camshaft and Tri-Y headers. I’m running way too rich and I’m trying to get the highest vacuum. The only way to do this is with a timing light. “The Sniper has the ability to control ignition timing and the Hyperspark ignition system provides the high voltage spark, plus the distributor is designed to provide accurate trigger signals to the EFI’s computer. Using the correct length carb stud and nuts, tighten the Sniper EFI throttle body down progressively in a “criss-cross” pattern (60-80 in. Dec 13, 2020 · The only way to check is to use a timing light. Jul 26, 2024 · Basically, you get your distributor to "fire" a resistor, instead of a coil. Jul 21, 2017 · Originally Posted by Danny Cabral The Target Air/Fuel Ratio Table & Base Fuel/Timing Table (and MAP kPa & RPM axes/scales) should be configured using the Sniper EFI software: In the Sniper EFI software (), Target Air/Fuel Ratio Table (Fuel ICF) & Base Timing Table (Spark ICF), select "2D Table" Type (not "Simple"). Make sure you have full (100%) throttle travel. I got my tank, 255 LPH pump, straps, vent/rollover valve and sending shipped to my door for $540. I've spent time some time on the ignition timing as well as the gauge setup. We do not tal Dec 31, 2018 · Now not being able to leave well enough alone. I am trying to learn how to tune my 408. The 35° trick is to get the distributor placed. Aug 4, 2021 · The Cam Specs are attached. Ive never experienced pinging sounds, but I know when Mar 10, 2018 · The overall general consensus on the Holley EFI forum is that the Holley EFI software settings for the sniper/dominator are overly rich to begin with. 90/ 4000lbs RW 11. A Terminator X is likely a much better match for an LSx application. Apr 5, 2021 · You didn't waste any money. I'm guessing they have a selection which you make which fixes the timing so you can set the distributor. May 29, 2018 · Sniper EFI Tuning & Tech. I really like the timing curve on the HyperSpark and would like to duplicate it as close as possible with the Jun 14, 2023 · May God's grace bless you in the Lord Jesus Christ. Setting the timing on your Holley Sniper HyperSpark is a critical step to ensure proper performance. 5/124mph -with a "top fuel" timing curve - sold I posted over on the holley sniper forum to Feb 7, 2023 · The Target Air/Fuel Ratio Table & Base Fuel/Timing Table (and MAP kPa & RPM axes/scales) should be configured using the Sniper EFI software: In the Sniper EFI software , Target Air/Fuel Ratio Table (Fuel ICF) & Base Timing Table (Spark ICF), select "2D Table" Type (not "Simple Jun 1, 2020 · I have been looking at the Sniper EFI 4150 Super Sniper 1250 for my engines. 73 gears and a ZF5. With your timing light, check the actual timing and adjust the distributor if necessary to get 20° at the crank. So out of frustration the Feb 25, 2024 · The sniper system controls the ignition timing with this distributor which really improves idle quality. To do this, open up the Initial Startup gauge screen. Follow May 10, 2020 · This would allow me to tune my engine to sync the timing curve perfectly with the fuel mapping for the best results, and the sniper automatically would adjust the timing to give a more stable idle. Aug 18, 2021 · Additionally, laptop software is available for the Sniper systems for those users who want to control fueling and timing themselves. I started with removing the TA 470 carb I had been running and removing all of the old fuel lines. Matt Oct 16, 2019 · An electronically controlled timing system would be whatever you want it to be. Does the fitech have a software to tune? 1974 chevelle with 73 laguna nose sbc 357 Brodix IK180 heads Comp Cams XE274H Edelbrock RPM airgap 650 AED double pumper, M20 muncie, Truetrac with 3. Sep 24, 2023 · Not sure where the disconnect is. Having the ability to have a specific amount of timing advance in each individual cell means your car will run smoother, use less fuel, and make more power! Timing control is one of the biggest benefits of EFI! Having the ability to have a specific amount of timing advance in each individual cell means your car will run smoother, use less fuel, and make more power! more. I would get a port efi system with waste spark or coil near plug capability and dump the distributor except to drive the oil pump. Anyway, that if very good to know. The timing curve is that rate at which your mech timing comes in See below example of a timing curve with Inital advance and Total. I have two vehicles each with a Sniper 2. Aug 27, 2019 · Take some time and work your ignition map and idle parameters. Then I added timing control and kept my timing values the same: Idle - 29-30°, cruise - 50° & WOT - 36°. The info on how to manipulate table multiple columns and rows is very helpful. Total Timing: This is the total of the initial timing plus the centrifugal advance added together. I have adjusted the timing with disconnected vacuum advance, and adjusted the timing to 10 degrees. 060 over pistons, 3. 3 angle grinds on both sides, 480HP potential naturally-aspirated, and valve train is rated beyond 7k without Jun 25, 2021 · The Sniper has no idea where top dead center is, for example. The Sniper unit replaced my Mighty Demon 750 annular carb on a 408 Clevor build 512hp/520tq. One has a HyperSpark and one has an MSD Pro-Billet distributor. Jan 3, 2018 · @hirschdalechevy, yes stock gm cam and heads. The Sniper setup has over 250 miles on it and has been running very Nov 27, 2021 · When I ran a carb my ignition timing with mech and vacuum advance worked out to 29° at idle. I used MSD EFI 6 ignition box and coil. GPS Antenna Connection PUSH ON & PULL OFF Connection Handheld CAN Connection to the Display via threaded collar. None of the Holley Tech videos I watched or instructions mentioned that either, I think. Timing curves are the same, just shifted. Jul 24, 2023 · Adding timing to the cruise area helps reduce internal engine temperature keeping the cooling system in check. Dec 11, 2015 · AUTOOL Timing Light 12V, Engine Timing Gun Strong Flash Lights with Sliding Sensor Clip for Car, Motorcycle, Marine AUTOOL-DIRECT $1,999. After a brief initial loading sequence, the default gauge display will appear. I know this Cam doesn’t make good vacuum. Nov 20, 2021 · Max timing is set @ 34 degrees. 647", Int & Exh, Lobe Sep 112°, Duration @ . Straight line, curve, flat, bumpy and random, etc. 623" lift 114° LSA H/R camshaft, Trick Flow R-Series FlowTech Induction Comp Dec 27, 2018 · The Target Air/Fuel Ratio Table & Base Fuel/Timing Table (and MAP kPa & RPM axes/scales) should be configured using the Sniper EFI software: In the Sniper EFI software , Target Air/Fuel Ratio Table (Fuel ICF) & Base Timing Table (Spark ICF), select "2D Table" Type (not Nov 20, 2021 · Max timing is set @ 34 degrees. It had been run for about 10 hours for tuning purposes and things didn't go so well for the installed application. It seems like it runs pretty well, more power thru the rpm range but it still idles at 1200 rpm give or take 70 rpm as it bounces around. I am interested to have the Sniper EFI control the timing. My car: A 1964 Impala SS, 409/340HP. Our Sniper was more than two years old and required a firmware update so that the entire Sniper system was using the latest updates. I'd like to adjust the timing curve the most as it's a very short, very steep curve going from 15 Jun 24, 2022 · “The HyperSpark Ready-to-Run Distributor is the easiest way to achieve timing control through your Sniper EFI system,” said Colin Kinser of Holley. A question I cannot get a 100% answer on is can you piggy back off the Sniper EFI TPS for an electronic transmission? The Sniper EFI Manal says not to but many EFI installers have informed me that the transmission only reads the 5V TPS signal from the Sniper EFI & does not draw any power so will not affect the Sniper EFI TPS output. 200" forged pistons, Trick Flow Twisted Wedge 11R 205 CNC Comp Ported heads, 12:1 compression ratio, 232°-244° duration/. First, some basic information about my engine: BluePrint Engines (BPE) 347 purchased in 2017: Fuel Delivery: - Fuel Injected, Holley Sniper EFI Manifold: - Edlebrock Polished Air Gap Ignition/Distributor: - MSD Block: Nov 21, 2015 · If I was to try to set up a dist curve for a big block about like yours (I'd classify your setup as a "hot street" deal, not really "race"), I'd shoot for around 36 - 38° of "total" timing (static + centrifugal, NOT including vac) at all RPMs above about 3000 or so; around 18° at idle, therefore around 18° of centrifugal adv MAX; adv Dec 11, 2016 · It was about $40 - $50 cheaper than the Holley Sniper fuel tank and looked to be the same thing. You can also set an advance curve based on engine vacuum. Feb 1, 2024 · Plus, the Sniper 2 throttle body is configured to use a simple connector to tie the distributor into the EFI system. Apr 18, 2020 · Sniper EFI Tuning & Tech. I have read most guys say 29-32 degrees is perfect for WOT. This is a way to match your old distributors settings. . advance to manifold vacuum. 409/425HP. Once all connections have been made, the Sniper EFI 5” Dash may be powered up. Sep 13, 2021 · The engine is 496 cubic inches with Sniper and HyperSpark. Dec 10, 2020 · I Googled the Sniper default timing curve/table as set by the basic parameters and it looked pretty bad. Nov 11, 2020 · Holley recommends making sure the Sniper EFI software is kept up to date, especially when updating to a new, computer-controlled ignition. Not all magnetic triggers are born equal, so as RPM increases your timing might wander off if the trigger speed of your distributor is not taken into account. 623" lift 114° LSA H/R camshaft, Trick Flow R-Series FlowTech Induction Comp Mar 15, 2019 · Sniper EFI Tuning & Tech. I need to know: initial timing total timing all in RPM total vacuum advance Thanks Jan 23, 2024 · Originally Posted by Danny Cabral The Target Air/Fuel Ratio Table & Base Fuel/Timing Table (and MAP kPa & RPM axes/scales) should be configured using the Sniper EFI software: In the Sniper EFI software (), Target Air/Fuel Ratio Table (Fuel ICF) & Base Timing Table (Spark ICF), select "2D Table" Type (not "Simple"). Here's a step-by-step guide to help you through the process: Can You Adjust the Timing with Holley Sniper EFI? Yes, you can adjust the timing with Holley Sniper EFI to optimize your engine's performance. Timing control is one of See full list on efisystempro. NIGHT & DAY DIFFERENCE in how it runs. The trans is a Ford AOD. The engine was dynoed with a best of 12. Ultimately, you can save a few hundred bucks, keep your stock looking distributor, and still have timing control. Jun 28, 2019 · With my sniper efi I completely created my own timing curve simulating my old curve and improving. Pro Dash JBTools Figure out what base timing settings to use when installing a Holly Hyperspark ignition. Apr 9, 2024 · The first thing is to get the base timing distributor position correct. Jan 9, 2023 · Hello all. Oh, one last thing. 0, cruise at 14. Ran my old 383 that way with a cam very similar to the specs. (If I am incorrect I heartily invite your comment at the bottom of this article!) Dec 27, 2022 · Hello. So lets set your dist had 24° of mech advance and your engine ran best with 32° total timing that would make your initial or base timing 8° BTDC. Being able to digitally tune your own timing curve across your whole RPM spectrum vs manifold air pressure unlocks the true potential of the Sniper. 218° intake/226° exhaust and 1600-5600 RPM range. of yours. I have a small block Chevy that is probably 450 HP/TQ and have a Sniper EFI on it. The Timing map built using the handheld is very basic and each engine will perform much more optimally with a timing curve built for the specific engine combination. Jan 13, 2019 · For those of you running an aftermarket EFI on your roller 302 motor, what are you setting as your max timing setting in the EEC? I know the Fox era 302s had initial timing set at 10^ from the factory, but would typically tolerate 12 - 14^ without detonation if running 93 octane. 5 compression, 235/239 @050, 535/550 lift with a Holley Sniper feeding the fuel and controlling the timing. Page 62: Changing Monitor Channel Scaling. Feb 20, 2013 · Learn to set your timing curve with the Atomic EFI TBI. Engine has a mild cam, headers, msd cd ignition, air gap manifold, manual trans, 3. You then need to fully synchronize the timing using a timing light and the Sniper 3. Place the Sniper EFI throttle body on top of the new flange gasket on the manifold. 3 in. The Sniper setup is running in CD Box configuration, the current distributor is a Mallory Max-Fire which has been running great. It takes your old vacuum settings, and converts it into a 31x31 timing map for the Holley Sniper laptop software! Super simple to copy over. Also, I show you how to h Sep 19, 2022 · Holley Sniper Timing Settings. The channels can be configured for the specific application the Sniper EFI is being used with and personal preference. The EFI software is required to build a quality timing table. 5 CR, AFR Enforcer heads and Howard's cam. Jun 4, 2021 · They want initial of 15 degrees and rotor phased to that degree with the rotor firing bar and wire terminals in the cap, Then, firing phasing to 50 degrees. May 24, 2019 · *69 SS 502 EFI /224-228* HR/9. The Sniper will not control the timing in this scenario and so it won't datalog actual timing. 8:1/T56/3. There are some advantages 1) Better resolution than the 123 regarding curve 2) Computer controlled idling. Attached Files Sniper Log 20230609-140018. 623" lift 114° LSA H/R camshaft, Trick Flow R-Series FlowTech Induction Comp Ported intake, BBK 80mm Sniper EFI Tuning & Tech. However, the Sniper EFI will have no control over the timing. It just looks weird to me. The Gray Wire coming out of the 6014 would then be connected to the Sniper and configured as a CD box. New member and owner of Sniper EFI here. " Sep 11, 2020 · Sniper EFI Tuning & Tech. IT IS JUNK and will cause you headaches. Turned out great and it's a beast. Apr 28, 2024 · Hey, was hoping you all could look at my Base Timing Table. And once the curve is established, it has some very sharp transitions between idle and cruise timing that sometimes benefit from some adjustment. Nov 25, 2020 · EFI timing curve is different than a non-EFI curve for a couple reasons. The MSD 6014 will work with the Sniper EFI. Your Cranking Timing of 15° is OK, but you could increase timing in the cells where your 302 idles to smooth it out. Currently: 13,5 - 35 - 33 respectively. From there, figure out the timing parameters you want in the elect5ronic curves in the EFI box. (MSD asks for -25) I don't have the Sniper (MSD atomic) but I would suggest trying -15 initial and -35 total to start with. To start viewing messages, select the forum that you want to visit from the selection below. In order for it to command timing the Sniper and ignition must be synchronized to each other. Jun 27, 2016 · I've used various mechanical limiters, advance springs, initial timing curves, power valves, air bleeds, etc etc etc I was totally bought in on the higher initial advance and using mechanical limiters to set my total advance and get peak performance from my engine after reading about it in several articles. 623" lift 114° LSA H/R camshaft, Trick Flow R-Series FlowTech Induction Comp Mar 5, 2018 · I just finished installing a new holley sniper efi throttle body with a holley dual sync distributor on my 327. May 7, 2023 · At least it looks like I can bypass the Sniper timing control this way and get it running for this season with a basic timing curve. 55 gears and modified camel hump heads. And the ability to alter the timing curve with the handheld instead of having to go and change weights springs and bushings is fantastic. May 4, 2020 · So, if you have already gotten over the learning curve and would like to help teach me (and others) the ropes, let's get started. 623" lift 114° LSA H/R camshaft, Trick Flow R-Series FlowTech Induction Comp May 19, 2017 · • Modify the table according to your combination (in this case we set all cells to 31 degrees, which is exactly how timing was set up before we began the EFI conversion. Aug 31, 2018 · I note that in the docs it says “It is HIGHLY suggested that a timing map using the Sniper EFI PC Software is built for the particular engine the Sniper EFI is controlling timing on. Nov 27, 2023 · The basic timing values accessed through the handheld will result in a very poor timing map, especially in the lower RPM low vacuum regions (as seen in the EFI System Pro link). The entire Base Timing Table can be edited/tuned. With the same static timing set, the timing should of course stay the same. So basically add 8* across the board. Dec 13, 2016 · Hello Chris. The program also will let you simulate a supercharger as well. I haven't manually tuned the curve on either the AFR or the ignition timing other than using the settings on the handheld. Yes, let the Sniper control your timing. With EFI timing control we can easily optimize the timing for the combination, increasing efficiency, power, throttle response, along with a reduction in coolant temperature. Jun 17, 2022 · I have never tuned or meshed with EFI and don't know much. 7 KB, 50 views) Amc 360 timing curve ok, so I reset the screws at 3/4 of a turn cw from the zero movement point of the blades. May 31, 2017 · Sniper EFI Tuning & Tech. SNIPER EFI MONITOR Sniper EFI allows the user to monitor different channels using the 3. On timing, yes, to some extent your trying to mimic what a timing curve looks like with a mechanical distrib, but don't limit yourself to that either. It's a street engine with pump gas compression, so this tune should be an okay starting point for similar engines. The initial timing will be determined by your camshaft profile and you need to know what the final timing should be and at what RPM it should be all in at. I've been reading quite a bit about actual GM vortecs and it sounds like the engineers really put a lot of time and effort these guys. May God's grace bless you in the Lord Jesus Christ. Put in all my specs for the engine normally aspirated and used that timing curve for when the engine was in vacuum, then inputed the same engine with the blower, used that timing curve for boost. Dec 15, 2016 · A year ago, converted to Fitech throttle body EFI, which could control timing, but chose to keep the timing as is, since it worked. There is also no smoothing of the curve by default which creates transition issues. and hook the vac. 2 block, Eagle 3. Holley EFI; Sniper EFI; If this is your first visit, be sure to check out the FAQ by clicking the link above. Their screen allows me to set the initial timing, the timing at WOT and max cruising Timing. But, in general, you start with something close to the existing curve of a non-controlled ignition and go from there. Sep 24, 2021 · The Hyperspark Distributor was designed as the best means to trigger the Holley Sniper systems so do not deviate from your original plan. I have trouble adjusting the timing and really need some input. Jun 2, 2022 · “Holley designed the Hyperspark ignition to complement the Sniper EFI,” explained Matthew Lunsford from Holley. Jan 19, 2024 · Anyway, not meaning to hijack my own thread about my idle tune with comments on V2 Sniper EFI software! BluePrint Engines 502 cid. HyperSpark timing control. May 15, 2017 · This is user-programmable aftermarket EFI. Set "Inductive Delay". This is what my Base Fuel Table looks like after uploading the Learn to base. I have 383 stroker SBC with 9. My Sniper specs: Holley Sniper (1) 4150. Run the 2D map and work the parameters, keep the transition smooth. The challenge will be what you call the "right fuel system". May 24, 2023 · I know centrifugal force based timing has a ramp, and then it flattens out at a “max timing”… I often hear people talk about pulling timing however at high boost, which implies a be curve (ish)… anyways - pros/cons please of keeping it simple with my current setup, or getting a dual sync for My sniper efi so I can control timing Nov 14, 2018 · So what is actually controlling timing then, the 123 or the Sniper ECU? Clearly the Sniper *thinks* the timing is dropping to zero, but we need to figure out if it ACTUALLY is. I currently have -10 fuel lines so think i'm good there, but will need new fuel pumps so plan on either Aeromotive A1000's or Dominator 12-1200's along with the Dominator 12-848 fuel bypass regulator. MSD Tech: Setting a timing curve with an Atomic TBI - Holley Motor Life Jul 29, 2015 · Even though you now have the USCG-approved Sniper EFI System as an option for your new EFI System you're not quite out of the woods yet. See post #2, this has to be done. Feb 18, 2021 · We typically dictated timing, and then let the engine tell us want it wants for fuel, beyond just a basic setup. Just like setting initial timing for best vacuum, but the Sniper makes this quicker & easier as there's no distributor to fiddle with. tdfmacubumodgosgcbuzaznmgcqnucxzivetwftoqulhdbahcecqtsc