Thread: AFR and Timing Tuning (02 Regal GS 223k!!!)

Originally Posted by darkhorizon

NIC cam for example works great with stock maf... commanded PE matched actual PE afrs dead nuts every single one I have tuned right out of the box.



You have a mechanical issue.. the maf sensor installed does not match the pcm maf table.




boost is not measured for fueling reasons in a 3800pcm.



Bigger injectors get different IFR values... its "tuned" when you put the correct values in. "crazy" sized injectors (80+lb) can cause some interesting issues by increased deadtimes or less linear flow rates, but its usually not sigificant enough to worry about, or you could adjust it in the maf on a per car basis, without using the narrowband.



I share all my "secrets". The "secret" is nerds sit around the internet reading 10000000000 things on tuning and are convinced its a 223 step process... its no harder than screwing a new air filter on in reality.... The hardest and really only "tuning" part is figuring out what AFR you want to run in PE... and thats something you can ask experts like myself or figure out on your own.

If your commanding 11.5 for your NIC cam and getting 11.5 then which table are you modifying? RPM vs Time?

Do you personally ever touch PE vs TPS?

Am I right when I say it must be one of both of those?

How do I get the correct IFR's then for 42lb injectors (if they are wrong)?

This is a zzp 1.0 I found.