Re: Elevation=lessBHP?

["Jason Gray" <jason510@worldnet.att.net>]

-----Original Message-----
From: Vaughn Adams <vadams@mbusa.net>
To: bbell@surview.com <bbell@surview.com>
Cc: quattro200@earthlink.net <quattro200@earthlink.net>; JAYTRES@aol.com
<JAYTRES@aol.com>; 'quattro list' <quattro@audifans.com>
Date: Monday, September 13, 1999 10:21 PM
Subject: Re: Elevation=lessBHP?


>I'm at 7000' and we loose a solid 25%. Don't know why a turbo car would
>loose any less-it's dealing with the same air.

  A turbo system that references the boost level to ambient pressure would
loose power. A system that boost to an absolute pressure level would loose
no power because the turbo is capable of filling the cylinders with as much
air as is needed even though outside pressure is reduced. This is why high
performance IC aircraft use turbos to maintain sealevel HP rating at high
altitude. There will be more of a pressure differential between ambient and
manifold pressure at altitude only because outside pressure is lower.

Later-
Jason K Gray
Wasilla Alaska
4000csq
Datsun 510 turbo