Subaru Enthusiasts Car Club of the Sierras - View Single Post - Exhaust cut-out & more on the road tuning.

Dean · 2005-08-16, 02:02 PM

Boost will always decrase with altitude unless you had a variable pitch configuration somehow on the turbo which I can't imagine how you would begin to do. There is less air, period and efficiency goes down. The Pikes Peek Tuning
post was great on this stuff...

I guess you could size the turbo and design the two sides for higher altitude, but I think your sea level performance would suffer.

2005-08-16, 02:02 PM	#103
Dean Señor Cheap Bastarde Real Name: Dean Join Date: May 2003 Location: $99 Tire Store Posts: 9,294 Car: $.04 STI Class: Fast,Cheap & Reliable=STI Deal, did somebody say Deal? Oh, Dean, yeah that's me.	Boost will always decrase with altitude unless you had a variable pitch configuration somehow on the turbo which I can't imagine how you would begin to do. There is less air, period and efficiency goes down. The Pikes Peek Tuning post was great on this stuff... I guess you could size the turbo and design the two sides for higher altitude, but I think your sea level performance would suffer. __________________ I am a Commodore PET --- Now get off my lawn you kids...