Holley sniper target afr table Using the Holley EFI software , 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). The Learn Table is just a shortcut for the Sniper. Plus it makes it more When running the Holley Terminator system with fuels containing ethanol, there is a single settings in the software that can make the difference between runn Member List; Calendar; Forum; Holley EFI; Sniper EFI; If this is your first visit, be sure to check out the FAQ by clicking the link above. 5, cruise at 14, and WOT at 12. The ECU only "Learns" the Base Fuel Table via the Learn Table. New build, started it for the first time about a month or two ago. If the best idle occurred when the AFR was 14. Would also clear Learn Table (keep a backup!) just in case the ECU Learned from some bad data from an exhaust leak. The system does not seem to be going into wide open throttle mode. Tuning this table allows a cold engine to run smooth without running too rich or too lean. Has anyone else seen that the table is too rich? I know Holley makes standard Sniper rich, didn't know it's same on the QuadraJet. Using the Holley Sniper EFI software (LINK), For cold engines, the Target AFR Offset table makes the most sense to me to use, then after you get the "cold engine Target AFRs" (Target +/- the Offset), you can math out the changes needed to make to the Coolant Temp Enrichment table to minimize the Sniper calculations. The second one I called (nationally known tuner with an excellent rep) that I used for our Holden/SS tune doesn't even work on Holleys. I use my commanded AFR table in 2D Table, but the transitions in AFR from the high vacuum areas at cruise to low vacuum areas closer to WOT seems to me they could possibly be better. 5:1 AFR, then you command it in the Target AFR Table and adjust the VE/SD table so that the appropriate fuel comes out. My AFR reading is bouncing around 12 to 14 then jumps to 20 plus and dies. 3) Go to the Learn Table and CLEAR the Learn Table. Keep changing the Target AFR at idle until it stabilizes. 3 AFR - Lean Best Torque In each case, the sputter kicks in when manifold pressure is around 0. When you have lean cruise numbers around 14 and WOT throttle numbers that drop to 12. After the system recalculates the targets, switch to "2D Table" and work with the cells right around idle. this is with the terminator software but nearly all holley tables are the exact same thingthoughts? questions, what to do next? let me know. At a minimum, use the handheld and the files function to Save As the GCF from the Sniper before you run the Wizard. The system is setup to produce somewhat reasonable idle, WOT, and cruise values with a full scale of 7000 RPM. You have the typical and very bad default Sniper Base Timing Table. Admittedly, I'm shooting in the dark on my Base Timing Table and Target AFR table. The Base Timing Table is still hurting you a bit, especially at low vacuum low RPM. 5, how do these numbers sound and how does this table look. 0. Your Target AFR table seems a little "off". Your Target AFR according to the Config File is 14, but the Target AFR shown in the datalog is 13. 4) The Target AFR table is still in the Simple mode. This time, go to the Target AFR table and while in 2D Table select the whole table and in one of the cells type in the number 2. All you do is enter the values and then select the table values, copy & You then go into the table and make all of the RPM settings match those in the Target AFR table. After pulling the trigger on the Holley sniper I'm now getting worried about fitting it, I've read that the EFI doesn't like a big The Wizard tune is mediocre at best so in the future, do some reading and learn the steps to modify and improve the tune. TPS is staying on 0%, and AFR is around 11. If the Learn Table is all single digits then the Base Fuel Table is very well matched to the Target AFR table. The engine starts up just fine, but after running for a minute or so the engine dies. 623" lift/114° LSA H/R camshaft, Trick Flow R-Series When setting up the Wizard, enter Target AFR values of 13. The datalog looks pretty clean, but there's a bit of a disconnect. If I wanted a richer mix in this region, should I just adjust the Target AFR or also bump the VE%? Background stats: '62 Ranchero Lemons racer, weighs very little. 6 or 14. Before you change to "2D Table" you could enter and idle of 13. Thus, Holley can not guarantee an answer or timing on an answer. So they had me change my Target AFR to 13. C3 Tech/Performance - C3 - Holley Sniper for Dummies - Level 2 - Holley Sniper Notes and Tuning Supplement for users by users Current Revision of Post #1 listed at the end of post. 4, and WOT 12. 25:1 gears with 245/35 R17 wheels. If the Sniper isn't in Closed Loop for some reason, then you'll have an issue. Right click on the 5500 and select "Fill Row Values" for even spacing. Edelbrock RPM Air-Gap Intake. The Learn Table in the Config File is full of some pretty large numbers. Your Base Timing Table looks a little weird. 4) Because of the Y-axis scaling, your Target AFR table has some fast transitions right in the area where it backfired. this is great when you dont need a 2 bar map sensor (non boosted) or 8000 rpm. Also, 100% is the It'll Learn new values quickly. Having such huge blocks covered by a single AFR target is kind of wasting the resolution of the Holley fuel tables. If you want 12. 3L SBF, Dart SHP 8. Post The Sniper doesn't automatically update the SD card, so the current tune only exists in Sniper memory. Timing is 16° idle 34° at 3,500. There In idle areas your Target AFR is 14 to 14. The current AFR table is auto generated by the sniper with idle at 13. The Base Timing Table and Target AFR table need to be enhanced and this will require the use of the EFI software. If the Target AFR table is programmed wrong, then the Sniper will Learn to make the engine run poorly. Holley provides an AFR table accurate to a decimal place, one that is probably great for a small block Chevy. Suddenly it started to go really rich on idle. Stockish compression. Fuel flow at 15 lb/hr +/- a tenth or two. The second one I called (nationally known tuner with an excellent Hello. Sniper 4500 AFR not matching plug color. Specs: Holley Sniper 550-511. Tuning this table will minimize the amount of cold engine Closed Loop Compensation. The Target Air/Fuel Ratio Table & Base Timing Table can then be Sniper 4150 HyperSpark Distributor Holley in-tank Pump Holds Fuel Pressure: 58-62 PSI Datalogs:-Warm Idle in Park, then put in gear for back half of datalog. After setting the Y-axis, while still in the table mode set the entire table to 5. Verify what the indicated AFR is when the engine is happy in Open Loop. Your Target AFR table probably needs some work as well as it's pretty flat across a broad operating range, but this is is not why The Base Timing Table and the Target AFR table is only active (populated) in 2D Table mode. 8. The Wizard created Base Timing Table is horrible. 5 and an actual AFR of 12. and then make small changes to reach the appropriate AFR. TPS reads 98% but the Target AFR stays 14. The Target Air/Fuel Ratio Table & Are you running both the Base Timing Table & Target AFR tables in 2D Tables? You can adjust the Target AFR by cell if you choose and smooth the table for better operation. 5 AFR - Best Rich Torque at Wide Open Throttle (WOT) 12. The biggest immediate concern is the default Wizard generated Base Timing Table. 5, but my AFR reading from my Sniper is saying 35. I have the Base Fuel Table reasonably well tuned. I then activated an Advanced ICF table that leaned the AFR how to setup conservative all motor timing and target air fuel tables in holley. I originally tried to lean it up my manipulating the target AFR table, but that didn't help. Sniper seems to want to add too much fuel. I've verified the fuel consumption, and it is 13-14 MPG with very calm driving. Good fuel economy is a direct result of the fine-tuning performed on the EFI system. 5-12, while TARGET IDLE AFR is set to 13. '92 Ford Mustang GT: 385"/6. So, using a VE model, you can tune the engine with 1973 Plymouth Scamp, 512 RB, Holley Super Sniper, HyperSpark ignition & distributor, TTI 2" headers, Pypes Exhaust, Trick Flow intake, Trick Flow 240 heads. The Target AFR is wrong for WOT too. The Coolant Temp Enrichment is 124. Acceleration Enrichment Tables (way too rich once Fuel Table is self-tuned). I'd target that to be in the 12. The Sniper is always trying to achieve the targets in the Target AFR table. 4 for cruise, and 12. Better to post this on Holley sniper forum with your confg and datalog if applicable. 8 x Absolute Ambient Pressure, and when watching the sputtering event unfold on a PC, the AFR is jumping across 3-4 base fuel table cells at the same time as MAP is oscillating as the computer is trying to normalize the AFR. The Target Air/Fuel Ratio Table & Base Timing Table can then be RPM, MAP, MAT, TPS, CTS, IAC, Target AFR, AFR Left, CL Comp, Ignition Timing, Duty Cycle, Fuel Flow, Fuel Pressure & Battery. If the Sniper is in Closed Loop during warmup, it will follow the target AFR table. 5, in the transition areas I have that moving rather quickly in . In the System Parameters Basic I/O you have activated fan and A/C controls. Your Base Hi. To my shock and surprise, the engine runs better than it ever has with the Sniper. 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 Holley Sniper EFI Training Part 13: Target AFR Table walks you through understanding how the target AFR table is an integral part of the airflow / fueling mo I set the Target AFR at 14. WOT Target AFR is 12. The Holley forums best advice was to use the standard configuration AFR table and take the car for a ride and "see what AFR makes it happy". 0, still same thing. The datalog looks pretty clean and the Sniper appears to be working properly, but since the Sniper doesn't measure fuel pressure, it meters fuel based solely on trying to meet your Target AFR levels. Holley Sniper EFI Training Part 12: Main Fuel Table / Airflow Model walks you through how the VE calculation works within the Sniper system. Near max throttle (80-85) is again too lean. We also break down editing the VE table for break point rescaling and calibrating proper fueling to the engine. Best thing to do is to datalog it and then look carefully at the datalog. I've since tried adjusting the Target AFR table as well as the Base Timing Table to lean out this area of the map, but there's no Base Fuel Table and Base Timing Table have been inputted. Changing the TARGET IDLE AFR doesnt affect idle AFR at all. It looks like Sniper 4150 HyperSpark Distributor Holley in-tank Pump Holds Fuel Pressure: 58-62 PSI Datalogs:-Warm Idle in Park, then put in gear for back half of datalog. I've looked for any modifiers and can't find any. 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"). 9 for WOT. The A/F Ratio Offset Table modifies (enriches) the Target Air/Fuel Ratio Table. 5 AFR increments. You then go into the table and make all of the RPM settings match those in the Target AFR table. 9% adding about 25% to his target. The Sniper can Learn how to destroy the engine if the Target AFR table is programmed to go lean at full I've had my Sniper in & running perfectly in my 347 Windsor for 18 months. The Target is 11. I’ve checked for exhaust and vacuum leaks and replaced the spark plugs. If the numbers in the Target AFR table aren't what the engine wants or needs then the engine will never run right. Cam specs: 220/224@050. You can do this by selecting the entire table and typing 5 into one of the cells. They all started and ran (holy smokes, before I got the progressive linkage and the extended throttle lever from EFI System Pro, my Jeep Commando would lay patches with 33” mud tires coming out of the driveway). Is this recommended? 6 AFR - Rich Burn Limit (engine fully warm) 9 AFR - Black Smoke | Low Power; 11. Justin 1972 F250 466 PPAM D3s, 213/227, sniper EFI, Nitrous. 6. Compare your VE% Table with the "Base Fuel:Stock Cam" GCF in the "Sniper Base Cals" folder, it's a little twisted. 12-08-2022, 11:41 AM. Everytime I drove it for 20-30 miles it ran good, I added and smoothed out the Learn Table RPM, MAP, MAT, TPS, CTS, IAC, Target AFR, AFR Left, CL Comp, Ignition Timing, Duty Cycle, Fuel Flow, Fuel Pressure & Battery. Find the happy place at idle with the system in Open Loop. Scroll through the datalog to the problem area. Looks like the majority of the Target AFR table is setup on the rich side for most scenarios. The Target Air/Fuel Ratio Table & Base Timing Table can then be The ECU only "Learns" the Base Fuel Table via the Learn Table. The Target AFR table is the "commander" table for the Sniper. If your Learn table contains values that are > +/-5%, you need to transfer your Learn to your Base table. Idle Air/Fuel Ratio – Typically between 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"). The RPM axis in the target AFR table will change automatically when you change the RPM in the Base Fuel Table. The Sniper doesn't know anything about what the engine wants or needs, the Sniper is just trying to do what the it's programmed to do. After pulling the trigger on the Holley sniper I'm now getting worried about fitting it, I've read that the EFI doesn't like a big If you look at the first 0-10 seconds of the datalog, the Target AFR (not actual AFR) is fluctuating like crazy between 14. High values in your Learn table just mean your base table is incorrect, and the ECU is having to do too much correction to keep the actual AFR in line with your Target AFR. The Target Air/Fuel Ratio Table & Base Timing Table can then be Dead cold engine (live tuning), 3. 7. 5 and 15. I have the idle Target AFR at 12. Recently it started running very rich, now it stalls and doesn't want to start. Went on 7 hour trip to Arizona, and after getting to destination noticed black smoke. You can keep the IAC port closed or open it back up. I've since tried adjusting the Target AFR table as well as the Base Timing Table to lean out this area of the map, but there's no Each of the cells in the table has a resolution to one-tenth. When you have a very good tune, turning off Closed Loop below 1200 might work, but in the area where it's at idle for an extended period you have a Target AFR of 13. Holley had me change out the WBO2 sensor, that didn't change anything. You're going rich in cruise areas and actually a little lean in some of the acceleration areas that aren't fully WOT. 0 range. Ensure the ECU is "Learning" (Learn Table LINK). In the datalogs you posted the AFR is acting normally for a system with a Wizard tune. The way your Target AFR table is set up under light acceleration you may end up even more lean under certain conditions. The lbs/hr fuel graph is pretty smooth. The Holley Sniper EFI will intermittently inhibit Closed Loop at idle, if the AE vs TPS/MAP RoC Blanking values are set too low . If you're using the 2D Table, I try to set the 9 or so cells in the idle area to 14. The Target Air/Fuel Ratio Table & The Coolant Temperature Enrichment Table modifies (enriches) the Base Fuel Table. Warm Idle AFR: Get the ending started and warmed up thoroughly (at least 10 minutes after it hits the thermostat opening temp). 2 and 13. 030". In 4th gear, I run 16:1 AFR. 8 idle. Sniper 2300 on a 2-to-4 adapter to an air-gap single-plane intake. Scrutinize: RPM, MAP, MAT, TPS, CTS, IAC, Target AFR, AFR Left, CL Comp, Ignition Timing, Duty Cycle, Fuel Flow, Fuel Pressure & Battery. . AFTER initial fueling corrections have been made: If you use Speed Density mode (in lb/hr), if you change the commanded AFR value, you also have to change the lb/hr values in the fueling Sniper seems to want to add too much fuel. Same with the Base Timing Table. To start viewing messages, select the forum that you want to visit from the selection below. 3. The bigger tuning issue is likely your Base Timing Table setup. Your Datalogs are in the "Documents", "Holley" folder, "Sniper" folder, "Data Logs" folder (. The actual tuning from there will be the Target AFR table, not the VE% Table or Base Fuel Table. Kit received Jan 2, 2020, Blueprint Page 45: Target Afr Target AFR Allows changes to the Target Air/Fuel ratio at idle, cruise, wide open throttle & boost offset if applicable. My 390 with iron heads liked 13. His Coolant Temp Enrichment doesn't go to 100% until 345 seconds into test. The Target AFR in this region is 11 which would likely initiate a bog from an over rich condition. 9 at cruise (1600 RPM plus), runs great. These are on a Gasoline scale. If you're still using the Simple mode, then change the target idle to 14. 2. I find this really odd. In that attached datalog, I let it warm up, then went for a short cruise on the highway, back into the neighborhood, idled on the driveway for 30 seconds ish, then put into gear to check stall condition. Note that place and then adjust the Base Fuel Table so the engine is happy at warm idle in Open Loop. 0 AFR, you get a difference of 1. then set your Target AFR at idle to that number. Then change it back to 2D Table, go to the graph, and smooth all two times. 4 and 12. Some changes to targets along with some Base Fuel Table changes will help to clear eventually. I have AFR heads, so a lot of timing is not needed. Next, change it back to "Simple" and enter idle - 15, cruise 15, and WOT 13. The numbers will reset, but aren't uniform. By tuning the VE so that the target AFR is actually reached, you can then change the target AFR table, and the engine will reach this without touching the VE table. However, you can do some quick changes with the handheld that might get you closer. If the problem gets worse at 14. What other threshold needs to be meet? I'm in Denver so the MAP only sees 80 kPa at wide open throttle. 63. ) works off of it to maintain the programmed AFR, so it must be right. If it has to do the same thing multiple times it "remembers" that adjustment and stores the "memory" in the Learn Table. If you want a different result, your gonna have to tell it so. Let it idle, watching the “bubble” in either the Target AFR or Base Fuel tables. The Target Air/Fuel Ratio Table & Just came across this excel spredsheet, that rescales you timing, afr and fuel table. This may be related to some transition issues with temporary lean AFR. You should be using 2D Tables and you should smooth them. TARGET AFR AT CRUISE Typically between 13. 25,40s Terminator EFI Tuning & Tech. Terminator EFI Tuning & Tech. Please indicate the expected redline for the engine and I'll provide a better initial Base Timing Table based on the redline and common settings for a stock cam. Ignition Timing Table (not enough advance in cruising area & light acceleration area). 5 on the target AFR. 5 AFR for a Lean Cruise, when the Stoich is 14. I If the plugs are wet from gas, they can short and not spark at all. Content is constantly being 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"). hefi file). 8 for idle, 14. The actual Config File is in the Sniper, and isn't on the SD card unless you download it. You may have to register before you can post: click the register link above to proceed. Post Cancel The 1st tuner wouldn't touch the Sniper although they loved the other Holley EFIs. 0 and timing is 36°. When it was running the Target AFR was 13. 9 although his Target AFR table is 13. I'm assuming that the shoddy Base Timing Table/Target AFR table is affecting the Learning, thus creating the wonky VE table. Ford SVO Y302 aluminum heads. L33 , 7875 single , Terminator X 120 lbs, T56 , pump gas. The reason I bring up this table; if you don’t get the AFR tables correct Holley Sniper EFI Training Part 12: Main Fuel Table / Airflow Model walks you through how the VE calculation works within the Sniper system. Andrew: Yes, I agree, that's the way to achieve your Offset Target AFR. Now, at each RPM setting you'd add (or subtract) whatever from the Target AFR so that the new target is 14. Another area that will affect acceleration from low to high RPM is in the upper left of your tables. The Target Air/Fuel Ratio Table & Base Timing Table can then be 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"). 8-13. I mean it's over 20 times per second it's making changes to the Target AFR. Changing the values in the Target Air/Fuel Ratio Table is easy; click and drag all of the cells with the same value, type in the value you desire, and press Enter. 38s with Grizzly Lockers, 40" Toyos on Hutchinson Beadlocks. The Target Air/Fuel Ratio Table & Base Timing Table The area of this AFR table that shows the cruising area of the map (3000 rpm row, columns 50 to 90 kPa) show slightly leaner than stoichiometric AFR. A Learn Table that's filled with single digit numbers says you can drive Allows changes to the Target Air/Fuel ratio at idle, cruise, and wide open throttle. 7 AFR and E100 at 9. This may be due to spark plugs or what appears to be a fairly lean Target Air/Fuel Ratio at idle of 14. Are you running both the Base Timing Table & Target AFR tables in 2D Tables? The 1st tuner wouldn't touch the Sniper although they loved the other Holley EFIs. How much ignition There are strategies that can be used to generate a smooth transition graph and keep good AFR parameters for different operating loads. I spoke with one of the guys on the Holley forum tha suggested I add fuel via the base table. 2 block, Eagle 3. The Target Air/Fuel Ratio Table & Member List; Calendar; Forum; Holley EFI; Sniper EFI; If this is your first visit, be sure to check out the FAQ by clicking the link above. NOTE - I've found the following EFI tables to be the most significant areas for improving fuel economy: Target Air/Fuel Ratio Table (too rich in cruising area). Truck was built for multi-day off-road. When the AFR is consistently lower than the target other suspicions would be excessive fuel pressure or a stuck injector. The Target Air/Fuel Ratio Table & Base Timing Table can then be The Target Air/Fuel Ratio Table & Base Fuel/Timing Table (and MAP kPa & RPM axes/scales) should be configured using the Terminator X EFI software: In the Terminator X EFI software , Target Air/Fuel Ratio Table (Fuel ICF) & Base Timing Table (Spark ICF), select "2D Table" Type (not "Simple"). The Target Air/Fuel Ratio Table & 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"). You're currently using the Simple mode for the Target AFR which limits the ability to tune specific areas of the targets. 4-speed Toploader MT, 3. All my other datalogs the Target AFR is pretty stable with very minor/gradual changes. Dead cold engine (Datalogging as it warms, then modifying the tables on a computer. In Learn Table I can see that it's adding around 20% on idle, and Specs: Holley Sniper 550-511. Andy: I think the Coolant Enrichment table is there for the guys that want to reduce their Closed Loop Limits to 5 to 10%. '02 Dakota, 440 big block Mopar with Holley Sniper 4150 and HyperSpark ignition, 46RH, Atlas 4, D60/14B - 5. You can also save your Config File, change the Target AFR to simple instead of 2D Table and live tune. If it stays like this, I'll be delighted. 1973 AMC 360 bored . On the AFR side try changing the basic three targets to idle 14, cruise 14. The Target Air/Fuel Ratio Table & Base Timing Table can then be The same goes for WOT. I have zeroed out the following to isolate the source of the rich mix: - Coolant Enrichment - A/F Ratio Offset - Air Temp Enrichment What's strange is that it will run 11-12 AFR with a target of 13. The idle stall during shifts (manual transmission), the dead cat RPM bounce at idle, and high RPM/light load flat spots are all gone. It might work, but it isn't what a pro would build. 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). I suggest that after changing the target and getting your idle setup that you may want to go to the 2D Table Target AFR. 5 AFR at cold (AZ so 85°F) idle. 8, you know that the engine probably doesn't like running that lean. Round up to the nearest tenth to make the mixture leaner; round down to make it richer. The following are typical values and tuning notes. All cells are updated accordingly. 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"). Holley Sniper EFI Training Part 13: Target AFR Table walks you through understanding how the target AFR table is an integral part of the airflow Sniper EFI. 3 in the Target AFR table. Engines with larger cams may need a richer setting for smoothest idle. From the first start everything worked perfect, got to cruising to break in clutch, transmission and all. Then put it back into Closed Loop and see what it does. Holley's base calibrations are not designed for good fuel economy. 5. May God's grace bless you in the Lord Jesus Christ. 536ex 112LSA 9. I was only adjusting the target AFR, since Closed Loop & Learn were active, it is my assumption that adjusting the Target AFR, will allow the Sniper to make the necessary changes to hit that target. 331 SBF stroker: Mid-9s CR. 5 (2 points richer than the Target AFR table). 7 and put the timing at what would be considered normal for a SBC at the RPM I cruise at. If I was working on the car I'd adjust the Target AFR at idle until I found the engine's happy spot. No matter what I do, it goes dead lean under 3000 RPM and a quick stab WOT. I got a Ford 32 hot rod with a 350 Chevy (Edelbrock top end kit, should be around 300 HP) and a 4L60E transmission. In the Sniper EFI software , Target Air/Fuel Ratio Table (Fuel ICF) & Base Timing Table (Spark ICF), select "2D Table" Type (not "Simple"). Since you're not using timing control with the Sniper, there may be some tuning issues that can be modified with timing rather than the Sniper. Closed Loop and subsequently Learning might be able to make up the difference, but at 12 it would indicate that your Base Fuel Table is rich. Many tuners here suggest trying different AFRs in Open Loop mode until the idle is good, then using that number in your Target AFR Table idle cells. Using the Holley Sniper EFI software (LINK), look at where the live cursor moves to during this occurrence, and You should use the software to reconfigure the Target AFR to "2D Table" instead of "SIMPLE" and focus on raising the AFR right at idle instead of a more broad range. This will set the entire table to 2. 9 and see if it acts any better. If you look at the first 0-10 seconds of the datalog, the Target AFR (not actual AFR) is fluctuating like crazy between 14. I checked the Learn Table and I'm confused why it's doing this. 5-13. I’m trying to tune a Sniper Stealth 4500 part #550-842. 3 AFR with the center of that square right at the full warm idle RPM If a Holley Sniper Throttle body is calibrated at 15. The Learn and Target AFR tables will be changed to the new RPM settings automatically. I think your idle AFR is too lean. I have some Advanced Tables setup to change the Target AFR & timing at the flip of a switch. The measured AFR tracks the Target AFR much better now. Some do, some don't. Or pay somebody to put it on a dyno. It idles pretty decent as it sits, but I'm a bit perplexed by the fact that when fully warm and I command an AFR in the upper 13s or lower 14s in all the cells that are involved at idle, the WBO2 reports a pretty consistent low 13s sort of number (not dead flat, it moves around a bit) and doesn't seem to get to my Target AFR. I lowered the Base Fuel Table manually to 50 and got the AFR to 13. 623" lift/114° LSA H/R Sniper EFI Tuning & Tech. Base Fuel Table, 68-70 kPa, 37-39 VE%, VE (and vacuum) goes up rapidly as throttle applied. The actual AFR is in the 12s. 5 & WOT at 11. 5 AFR for safety margin via extra fuel combustion cooling should be fine. The Target Air/Fuel Ratio Table & RPM, MAP, MAT, TPS, CTS, IAC, Target AFR, AFR Left, CL Comp, Ignition Timing, Duty Cycle, Fuel Flow, Fuel Pressure & Battery. CTS, IAC, Target AFR, AFR Left, CL Comp, Ignition Timing, Duty Cycle, Fuel Flow I'm having an issue with a Holley Sniper 4150 style TBI. 8 The Sniper tunes itself to match what's programmed in the Target AFR table. I need suggestions on why it adds 20-40% fuel to Learn Table. 3:1, then you target should be set to 14. 0:1. Target AFR @ 14. I ran some numbers in the EXCEL spreadsheet program that might work pretty well for you. The Target AFR should be richer on startup and should lean out as the engine warms up. Comment. No, changing the Target AFR table doesn't change the Learn Table. You also Essentially, it's going in & out of tune and the frequency of the "surge" or instability may be related to the response of the Sniper control conditions. The Target Air/Fuel Ratio Table & Base Timing Table can then be Your Config File is in the "Documents", "Holley" folder, "Sniper" folder, "Config Files" folder (. Observed AFR steady between 12. For example, the default Target AFR setup creates a lot of sharp AFR steps that can be misinterpreted as bogs. Is the idle AFR reading too low or too high with lots of camshaft overlap? What's a good idle Target AFR for a big camshaft street engine? But in simple terms, I'm at 18° idle, 36° WOT & 28° at 1900 cruise (65 MPH). The Target A/F Ratio table is probably too lean at idle. this is with the terminator software but nearly all holley tables are the exact same thing thoughts? I'll be having my Holley Sniper installed soon and I'm wondering how to find out the target A/F ratio to enter in the parameters for the initial start up ? I know that most vehicles nowadays aim for a ratio of 14. 5-14. The Target Air/Fuel Ratio Table & Base Timing Table can then be 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"). 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). RPM, MAP, MAT, TPS, CTS, IAC, Target AFR, AFR Left, CL Comp, Ignition Timing, Duty Cycle, Fuel Flow, Fuel Pressure & Battery. You should have the Target AFR table in 2D Table and you need to find the best Target AFR. But also now WOT AFR immediately got Lowest MAP and most steady idle (yellow ball, feel, sound, MAP fluctuation), it's still liking about 13. So this indicates the Target A/F Ratio table isn't optimized. 5 and timing is set at 32°. The Target Air/Fuel Ratio Table & Base Timing Table can then be properly configured & tuned for any engine. The Target Air/Fuel Ratio Table & 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"). Not knowing the specifics of your engine, for the timing set idle to 18° (only 10° currently), cruise to 40°, and WOT to 34°. 9 to 14 at idle. Seeing an issue where my 2300 Super Sniper is too rich during cold start with NO temperature enrichment. However, changing TARGET WOT AFR and the idle AFR immediately got better. Program that number into your AFR table for the idle setting. Your "A/F Ratio Offset" dictates your Target A/F Ratio and your Coolant Temp Enrichment and Closed Loop will work to achieve your Offset Target AFR. It looks like the ECU is doing what you're telling it to do. 6R80, NP205, Locked D60/10. 6 AFR. 7 AFR. So, idle in high 13s AFR for smoothness, cruise around 14 AFR for economy, and WOT 12. 8, cruise at 12. ) 1. 528/. if you change rpm range or map range the fuel and timing table cells does not automatically re-scale in the holley software. I always suggest taking notes of your current distributor's ignition timing specs/curves The Sniper doesn't "Learn" how to make the engine run best, it just Learns how to maintain the A/F Ratio specified in the Target AFR table. 7 and other fairly lean targets in the cruise range. Comp cam 270H. You can adjust the VE% Table all you want, but in Closed Loop the ECU will adjust the fuel to match the Target AFR, and will undo any changes you made if you did not change the Target AFR. 2 AFR - Safe Best Power at Wide Open Throttle (WOT) 13. What you see is my attempt at the "How To Build A Custom Timing Table - Sniper EFI" that Holley posted on YouTube. I was digging through my info from the Holley classes the other day and found a chart that showed the various stoichiometric values for gas, methanol, E85 & E100. Post I installed the complete Sniper EFI system with timing control via Sniper Box and Hyperspark distributor into my 383. 2 to 1 to If you have the Sniper in Open Loop then you should manually adjust the Base Fuel Table while watching the display to see what AFR the engine likes best. dl file). 623" lift/114° LSA H/R I was never really happy over the past two years with the base calibration Timing & AFR tables modified by the Sniper. I downloaded the EFI program, 80 kPa Target AFRs are 14. Interestingly, your Base Timing Table is currently set correctly. First thing I noticed was that the Base Fuel Table is very rich, I saw 70 VE% in the idle area which had it running at 11 AFR. TARGET AFR TARGET AFR AT IDLE Typically between 13. 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 ( LINK ), Target Air/Fuel Ratio Table (Fuel ICF There's a crater in the Base Fuel Table at idle. 200" forged pistons, Trick Flow Twisted Wedge 11R 205 CNC Comp Ported heads, 12:1 compression ratio, 232°-244° duration/. I have a Sniper with an odd problem. I’m running on E85. The Target A/F Ratio Table is the "commander". Login or Sign Up Logging The Sniper tunes itself to match what's programmed in the Target AFR table. 470" forged steel crankshaft & H-beam rods, Wiseco 4. 7:1 Compression Around 2200 stall converter with th400 3:73 gears in the rear The Sniper is running pretty good, much better than the carb I had on it. The following are typical values and some tuning notes. 5 and the system is tracking that very well. Everything (WBO2 sensor, Closed Loop operation, Learn Table, Base Fuel Table, etc. Then look exactly where this happens on the Base Fuel & Timing Tables. If this is your first visit, Although Holley employees will take part in answering questions from time to time, your questions may or may not be answered by Holley personnel. After doing some math and dividing the AFR numbers, the difference between straight gasoline at 14. khitq spvns tsda uazn kpu azqmaifar yzk oxbbe ifjn qcw

Holley sniper target afr table. Suddenly it started to go really rich on idle.