Boost question when tuned at higher elevations?
Thread Starter
Instructor
Joined: Nov 2006
Posts: 211
Likes: 11
From: Alamogordo New Mexico
Boost question when tuned at higher elevations?
When you do some mods, say a lower or upper pulley on a ZO6 supercharger, then get a tune at a higher elevation, say ABQ or Denver, you won't see the same max boost as will be seen at sea level. Say 10 PDS at Denver V 13-14 PDS sea level. Will the ECU adjust for this as you drive from Denver to say Houston. Or will the tune for this higher boost be a best guess by the tuner?
I see where you retune at sea level(or thereabouts and then drive to Denver, but in the sea level tune all the boost will be seen, so no problems. But going from a higher elevation tune then drive down to sea level, you get more boost so what goes on with this?
Thanks, Best. Tom.
I see where you retune at sea level(or thereabouts and then drive to Denver, but in the sea level tune all the boost will be seen, so no problems. But going from a higher elevation tune then drive down to sea level, you get more boost so what goes on with this?
Thanks, Best. Tom.
Racer
Joined: Jul 2019
Posts: 411
Likes: 100
The mass air flow and barometric sensors let the ECM know the air density changes and adjust accordingly.
Just dont max out your fueling at higher elevation because it may not keep up in cooler weather or sea level ect.
Just dont max out your fueling at higher elevation because it may not keep up in cooler weather or sea level ect.
Burning Brakes
Joined: Aug 2009
Posts: 770
Likes: 164
From: Southeastern NM
Not long ago, we had a crazy weather spell and the DA showed to be a lil over 1200' and I was on 78% E (a lil more than what I was tuned for). My car did not run well and backfired. Also, my engine light flashed as if it had a misfire, come to find out, I was runnig out of fuel, lol!!! All is good now, car screams on E50.
