Edelbrock Pro Flo 4 EFI

This weekend I was messing around with the tune, since I installed an MSD shift light and was trying to get it to "turn on" at 6k RPM in the road, hahaha.

I noticed a slight hesitation at high RPMs and saw that sometimes the AFR was around 13-13.5 instead of 12 which is what I set it at (I was running map 5034). I decided to load a another map to see if that corrected it, and after trying around other 3 maps I ended up with map 5037 and that one really nailed it. Map selection can get confusing because your setup may not meet all ranges in the edelbrock guideline table, so thats what messes things up I believe.

In my case I have a mopar small block (360) that has a 426 stroker, hyd roller 238 cam and aluminum ported heads with 2.08" intake valves, I guess that changes all the airflow characteristics of a stock engine with just a cam upgrade. Despite the mods I get a pretty good vacuum at idle (16-20) because its roller type and the profile can be more agressive. Very pleased with the results, the car fells a lot stronger now because it goes instantly to 12's on AFR on full throttle.

The message is keep trying maps until you really get it just where you want it. Changing maps its pretty easy. Just make sure you screenshot every "custom settings" like fan turn on temp, timing, etc.