off topic: mounting tb before turbo, benefits and drawbacks???

[Bruce Plecan]

-----Original Message-----
From: Chris Conlon <synchris at ricochet.net>
To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
Date: Wednesday, October 07, 1998 1:04 AM
Subject: RE: off topic: mounting tb before turbo, benefits and drawbacks???


Well, if you're really in lag reduction, the Indy Buicks used like 7-8, and
I
think a 9 butterfly setup.  A blow-off valve, and some clever metering, and
maybeusing an EGR for admitting air into the exhaust should all be good
answers.
Buce


>> Most turbos do not have the compressor side seal required to allow
>> them to live in a repeated high vacuumm state.  It can be ordered
>> with SOME models..
>
>Could someone please make some specific suggestions as to what brand(s)
>and kinds of turbos can be had with a good enough seal? The possible
>lag-reduction benefits of running a turbo this way are too much for
>me to ignore. I'm looking for something about the size of a large
>Turbonetics T-3 or a small T-4, if that helps with picking specific
>turbos or manufacturers.
>
>   Thank you,
>   Chris C.
>
>