Quote:
|
Originally Posted by Insider
Can we get an update on how the car performed at 4,000 feet? Was it able to maintain full boost etc? Thanks!
|
I don't know if it was 4000' (the Grapevine in socal), but it turns out the factory ECU doesn't fully compensate for a decrease in atmospheric pressure. In other words, the car ran lower absolute manifold pressure at high altitude. This may be something that we can fix. However, we do need to be realistic with turbo limitations before asking it to run full manifold pressure at 5000' above sea level. Especially at the upper reaches of the RPM band where the turbos begin to run out of breathe. I'll try to take some more datalogs tomorrow when I drive through the Grapevine again. It was closed today due to road ice hazards. Hopefully it'll be negotiable tomorrow... fingers crossed.
-shiv