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Tuned sea level, now @ 5000. runs sluggish, what next?
Posted: Sat Jul 13, 2013 8:59 pm
by 321 Go
Very rusty from 7-8 year hiatus. So I consider myself a newb. Have clear understanding of tuning. Just not much experience with s300. Helping a friend. His car was tuned at seal level on s300. Ran great, now at 5000 feet above sea level. Runs awful and wont boost when warmed up.
Runs ok when cold. But, when warm the car will not boost and it feels like it hits a wall. No audible detonation. Some details since Im a newb would be greatly appreciated.
Setup on my friends car is D16y8 built motor, 8.5:1 compression. (I know, don't ask) 6 psi turbo, and 440 dsm injectors.
Re: Tuned sea level, now @ 5000. runs sluggish, what next?
Posted: Sun Jul 14, 2013 5:11 am
by Luke
the height above sea-level might be the problem.
normal P28/30 don't have that circuit inside, which measures the barometric pressure to compensate.
P72, afaik, have that. change the ECU and everything shall be fine.
best regards Lukas
Re: Tuned sea level, now @ 5000. runs sluggish, what next?
Posted: Mon Jul 15, 2013 12:01 am
by 321 Go
Changing the ecu is not an option. My question is what do you recommend I change first to get the car to run right at this elevation. Will be street tuning. Thank You
Re: Tuned sea level, now @ 5000. runs sluggish, what next?
Posted: Mon Jul 15, 2013 12:09 am
by Luke
i haven't mentioned a new tune, because then it'll run great at 5000ft, but not at sealevel anymore.
you will have to compensate that somehow.
best regards Lukas
Re: Tuned sea level, now @ 5000. runs sluggish, what next?
Posted: Mon Jul 15, 2013 10:17 am
by Spunkster
What is the code on the side of the ECU?
Re: Tuned sea level, now @ 5000. runs sluggish, what next?
Posted: Fri Jul 26, 2013 1:15 pm
by 321 Go
Spunkster wrote:What is the code on the side of the ECU?
It's a P28. I thought these ecu have a barometric input. Guess I was wrong... Can I highlight the entire low and high cam fuel map and subtract say 10% and go from there?