chugging under heavy throttle in higher gears

[old skool]

i will for sure. youre talking about heavy accel, rite? like WOT?

 

[jdub]

Anytime during accel, including WOT. The thing is the ECU learned value has increased duty cycle on your 440 injectors to compensate for the increased flow from the Lex AFM. In the upper range of duty cycle, changes to FP can have bigger than expected results. I'm telling you to be careful...larger than 12.5 is too lean, especially at WOT.

 

[old skool]

that's very useful info there. thank you.

 

[grimreaper]

i would consider that almost against logic. stock pump runs out of steam at 60 psi give or take. If its not dead headed now its got to be close. Frustrating to get bad info but that explains the rich under wot conditions.

 

[old skool]

prolly shoulda put in a list of the breathing and vital fluid 'what-nots' to make sure we are all headed in the right direction...better late than never i guess.

AVC-R w/ stock (rebuilt) turbo @ 12psi
3" turbo back
Lexus AFM
Hard pipe intake
Aeromotive FPR
HKS metal HG
Blitz BOV

So, 550s, fuel pump, & ~27 FPR is what youre saying i need, correct? Ugh, i hate finishing what someone else left behind...

also, where should my o2 be, idealy (sp?) when it all comes together so i can tell it's not gonna blow up on the way to the tune? Cuz that might make my day really sucky.

EDIT: sweet avatar grim :thumb up:

 

[Nick M]

The thing is the ECU learned value has increased duty cycle on your 440 injectors to compensate for the increased flow from the Lex AFM.

Not to nitpick but...pulse width will not increase with a larger airflow meter, it will go down. Flow through the meter goes up, but Hz goes down. Lower restriction.

Other than that...