AE settings for best 60 foot?

[RockinRobin]

Taking it to the track tomorrow night to try to fiddle with AE settings and see If I can get a better 60 foot. I assume the setting to change volume is AE TPS vs Coolant temp and if I want it to last longer MAP AE Time vs Coolant. Any advice on AE?

[Danny Cabral]

http://forums.holley.com/showthread....9444#post29444 (EFI Acceleration Enrichment In Carburetion Terms)

[RockinRobin]

http://forums.holley.com/showthread....9444#post29444 (EFI Acceleration Enrichment In Carburetion Terms)

Great info, Danny! I'll take this to the track with me.

[Danny Cabral]

The most prevalent adjustment is the AE vs TPS Rate of Change.

[RockinRobin]

In case you want to see where it's at now:

[a b c]

Looks like you may be able to lean it out a little in the AE tables. Looks like they're forcing it a little rich on the hit. May want to Limit the CL Comp negative control to minus 3 or so, to keep it from over correcting and giving you that little lean spot just after the hit. Of course, I have no idea what your doing with the timing, but after that, it looks like chassis work, gear, and torque converter may be your next moves.

You could work on the area of the Base Fuel Table where you are staging/idling the car. The transition off idle is not well tuned/smooth.

[RockinRobin]

Timing is locked all the way up, so it shouldn't be an issue. What about Learned Compensation Limits? Should I bring those down, too? I noticed they're at 50%, while the Closed Loop Compensation Limits are all at 20%. I'll look at Base Fuel Table off idle. I assume you mean at 100%TPS.

[Danny Cabral]

I never completely disable Learning. https://forums.holley.com/showthread...271#post231271 (Programming GCF To Prevent Corrupt Tune From Failed WBO2 Sensor)

[RockinRobin]

Well, it seems I've gotten ahead of myself, as it looks like the Base Fuel Table is not well tuned yet. Appears to be a bit rich in some areas. Should I just keep Transferring Learning To Base and smoothing at this point?
MyZipFile.zip

[AndyF]

Yes, you should tighten up the Learn Limits. You have them at 50%, but your Learn Table has small numbers in it. I don't see anything larger than a few percent so you could tighten the Limits up to something like 15%. If you race at tracks with different elevations you might want to build tunes for each track.

I think your Target AFR is too rich at full throttle. Most wedge head engines run best at 12.8 or 12.9 when burning race gas. I'm not sure what fuel you're running, but 12.4 seems too rich to me. Have you had the engine dyno tested? If that isn't in the cards, then you'll just need to try different Target AFRs and watch the time slips and the plugs.

[RockinRobin]

Thanks! This is actually a Mopar Gen III engine at 13.5: Compression with a race cam. I'll see if I can get some info from people who build and dyno these things a lot. Other than that, like you said change the WOT AFR and run it down the track and see what happens. Also, I'll tighten Learned Limits to 15%. Thanks! Should I keep Transferring Learning To Base during this process?

[Danny Cabral]

Should I keep Transferring Learning To Base during this process?

Read this thread (LINK), that's what it's all about.

[AndyF]

Okay, now I remember that you're running a Gen III. Which is kind of a Twisted Wedge rather than a true Hemi like the Gen II. I've done a little dyno testing on Gen III super stock engines. I know that they're super sensitive to ignition timing, but from what I recall we always ran them around AFR of 12.8 or 12.9 with race gas. Timing was usually around 26° to 28° total, but I suppose that can vary depending on which head is being used.

I use the Learn Table as a tuning tool. For example, if the Learn table has big numbers in it, then Transfer Learning To Base since the big numbers mean that the Base Fuel Table isn't correct. If the Learn Table has small numbers in it, then I just zero it out before we start making passes so I can see what the system is doing today. With a race car I check the datalog and the Learn Table after each pass just to see what's going on. If nothing is going on, then no adjustments are needed and you can let it rip. If something is happening in the tune then figure it out and fix it.

[Danny Cabral]

https://forums.holley.com/forum/holl...313#post372313 (Related Idle Tuning Post)

[RockinRobin]

AndyF: I have an opportunity to test & tune at my local track this Friday night. I've cleaned all of the plugs (they appeared slightly black and not fouled) and it idles fine. My WOT is currently set at 12.4 AFR, I propose to set it to 12.6 AFR before the 1st TNT p**** then reset to 12.8 AFR and make a pass. Does this sound like a reasonable approach? Will I need more than 1 or 2 passes at each setting for the Learn to adjust?