Frederic Breitwieser/turbo discussion

[Gary Derian]

This has been done to make a small engine behave like a big one.  Mazda RX-7
and Nissan Skyline GT-R or some such Japanese only homologation special.
Since you already have a big one and can prolly spin your tires at will I
don't think the complexity is worth it.  Just put two turbos on it set for
mid to high rpm.  After all, the only time you are under 3000 rpm is in
first gear, even with a Pontiac.

SAAB uses a turbo on one bank of a V-6 for the whole engine.

Gary Derian <gderian at oh.verio.com>
>
>I was mulling around a little idea I had about my Pontiac.  It's in the
>garage with no fenders, the 400 looks pretty bare, with no harness or
>plumbing.  I have a spare (used) turbo sitting there from my old Mustang
>('84 GT350, turbo4) and have been contemplating adding this along with efi.
>Then I thought about a setup something like the original post about the
>variable exhaust system.  I was thinking about a relatively small turbo
>driven by one bank, to get the boost rolling, then a pretty large turbo on
>the other bank that would take over at higher rpm's.  I didn't get into the
>pro's and con's yet.
>
>One  thought was the need for some sort of "flapper" valve to avoid the
>small side disrupting the spooling up of the big side.  A 2 into 1 Y, with
a
>long flap in the transition area, that would effectively close off the big
>end at lower rpm, when the little guy was pumping away, then as boost built
>on the big side, it would force open the valve and provide big end juice.
>
>How about that?  Food for thought, or brain fodder?
>
>Jim Yeagley
>1996 Dodge Indy Ram
>See it and many others at: www.indyram.org
>1975 Pontiac Grandville Brougham Conv. (in baskets)
>webmaster at indyram.org
>jimyeagley at stratos.net
>
>