Tuning for elevation change

D

Dove33

one piece at a time ...
Joined
Feb 17, 2012
Messages
33
I just moved from sea level to 7700'. Truck seems to be lacking a lot of low end and fueling a little too much, hence more smoke than I like to see. I expected a little bit of lag and smoke but not quite as much as I am getting. I am going to clean my air filter today and see if the helps. Truck also threw an overheating code, got a little hot towing through Kansas and Oklahoma, I don't know if that is part of the issue. Thanks for any and all help.
 
Well at 7700 feet your oxygen percent goes down to 15.5, air pressure from 14.7psi at sea level to only about 11 psi, that's a significant change. You'll have to either turn the Juice box down and/or learn to roll into it a little more slowly. The good thing about a turbo engine is it can offset thin air by a certain amount but it does affect spoolup.

I have a Garrett Stage 3 (GT3788R) dual ball bearing turbo and when I was at 7300 feet last year on a warm day it did surprisingly well, sure it was a bit slower but was easy to drive smoke free.
 
Last edited:
I get the concept of lower oxygen % and less air pressure and I expected some loss of performance and turbo lag but it seems to be a good it more than expected. Even with the edge all the way down and a very slow start the egt's seem high and the smoke can get ridiculous until the charger finally lights.
 
You must log in or register to reply here.
Back
Top