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stage 2 t.b. tuning help

F

fbm

New member
Hi guys i installed a used stage 2 throttle body and my tune is so bad from the start my ltft +16 and after a maf tune i am getting them close to + 5 i also changed the tp pe table lower and more pe at 20-30 % throttle i am getting lots of kr, with less than 2 psi of boost i am getting 2-5° kr and i think 4 psi i can hear the detonation over 10° of kr i immediately let off where should i start and what table should i modify first or should i get a tac module
 




I wish i took some pics it looks like the one on zzp of the stage two but its a 1998 so no epoxy was needed
 
Ugg. All ported tbs are 98 style with a 99 maf...

Go back to a stock maf file and add 25% to the whole thing and go from there.
 


yes, leave your IFR where it should be... You dont really have a decent maf file to look at anymore so your IFR is going to stay put.
 
Thanks you are really close to what i started with using dhp and table modifier most my maf table has been 25-27% from 2000 to 6000 hertz i figured that the amouny of adj needed it is best to start with ifr but i am going to do the 25% the whole table and see how it goes
 
Thanks 33% increase to the maf table and now i am -5 ltft and safe pulls like craze with 50% throttle i have some adj to make and a ssic to install thanks again
 
:th_bowdown::th_clapping: now DH finally is having someone modify their MAF....wow never thought that day would come.
 


Its not required persay but when you build a maf from nothing its an option to change the curve a bit based on what you find. Fixing mechanical problems by changing the maf is still hokey.
 
darkhorizon said:
Its not required persay but when you build a maf from nothing its an option to change the curve a bit based on what you find. Fixing mechanical problems by changing the maf is still hokey.
Click to expand...

I completely agree with what you say here. You don't compensate for a mechanical problem with tuning. I could see in an emergency to limp home... But tuning is not a replacement for a broken or out of spec part
 
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