PDA

View Full Version : MAF/INJ value files... dumb question


SpeedofSound
September 9th, 2008, 12:58 PM
sorry for the ignorance here guys but i have a question that will probally seem dumb to most but it has been stumping the absolute heck out of me for a while now.

senario...

i have a 03 mach 1 thats cammed with crower stage 3's
i have a 90mm lightning MAF (HOUSEING ONLY) with my stock MAF sensor bolted in that is cal'd for stock 24# injectors
i have also replaced my stock 24# inj with 36# injectors

what values am i supposed to load?

right now i have tried....
1) 90mm lightning MAF with 36# injector files
2) value file i got from Justin a while back that was made for a 85mm c&l housing with stock sensor and 36# value files(tune i got from him with my PRP package for an old combo but it still worked with new combo in guam but does not work stateside)

i have played with the maf trans function and still i have a diveability buck when holding cruise rpm's and at a decel at low speeds in too numerically high of a gear...lugging per say. while i know i will never get the car to drive like stock and i also know that i cannot LUG in to low of a gear because of the cams power range.... this i know.

so do i try loading just the 36# injector file and then redo my stock maf trans function? if i do this then i am assuming that i will need to scale the maf trans function to about 20% higher just to start the vehicle and datalog so as not to start too lean.

i know i'm retarded....please help.... in laymans terms or pm me if needed.

Thank You all in advance
Rob

SpeedofSound
September 11th, 2008, 10:05 PM
nevermind
sorry to waste everyones time!!

Justin@VMP
September 12th, 2008, 09:57 AM
I don't think the 90mm maf housing works that great on NA cars.

I would load the 36lb inj vals, then add 10-20% to the stock maf xfer to compensate for the larger housing, and tweak from there.