Tuned sea level, now @ 5000. runs sluggish, what next?

s300 and SManager software questions & answers
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321 Go
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Joined: Thu Jul 11, 2013 10:46 pm

Tuned sea level, now @ 5000. runs sluggish, what next?

Post 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.

Luke
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Joined: Thu Mar 26, 2009 10:24 am
Location: Dorsten/Germany

Re: Tuned sea level, now @ 5000. runs sluggish, what next?

Post 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

321 Go
Posts: 4
Joined: Thu Jul 11, 2013 10:46 pm

Re: Tuned sea level, now @ 5000. runs sluggish, what next?

Post 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

Luke
Posts: 249
Joined: Thu Mar 26, 2009 10:24 am
Location: Dorsten/Germany

Re: Tuned sea level, now @ 5000. runs sluggish, what next?

Post 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

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Spunkster
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Re: Tuned sea level, now @ 5000. runs sluggish, what next?

Post by Spunkster »

What is the code on the side of the ECU?

321 Go
Posts: 4
Joined: Thu Jul 11, 2013 10:46 pm

Re: Tuned sea level, now @ 5000. runs sluggish, what next?

Post 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?

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