[Shotimes] Re:Twin Turbo SHO

[Ron Nottingham]

I would say without a doubt, that the twin turbos had nothing to do with the
spun bearing, but rather bad lubrication from the start.

If you want to put twin turbos in a SHO, one would need to use either 2 T2's
(or something of a similar small size) below the heads, or either 2 T25's or
maybe T3's (these may be too large to fit) over the gearbox.  A single T04B
(the one that was used in the CarTech kit for the Mustang GT, I forget all
the small details like A/R, etc.) is just the right size for the engine.
Two T25's (like those on 87 to 89 Z31 300zx turbos with the VG30ET engine,
just need to rob two cars though) would give awesome torque, and still have
some left over for a nice top end charge.  The T25's may fit below the heads
also, I haven't tried to fit them (didn't have access to any at the time).
I do know the turbos from a late 80's Chevy Sprint Turbo (I think these are
a T2) will fit just below the heads.  They may be a bit too small for
anything over 12-14 psi, but for a low boost application should provide some
serious torque low in the rev range.

Of course, if the SHO engine will be mounted in something other than an SHO,
you may have more clearance to hang the turbos off of the manifolds
(remember, the closer the turbo is to the heat source, the better) and have
a wider choice of turbos.  If I were to build an all-out twin turbo SHO, I
would get a couple of those Disco Potatoes (look in past issues of Sport
Compact Car), small turbine, large impeller, ball bearings, the works.

I will try to dig through all my "junk" to find the info I had researched
some time back for turbocharging the SHO, and some links about sizing for
the SHO engine.  I pretty much gave up in doing anything to my SHO (I had
planned on building a twin turbo with a huge I/C) when I became infatuated
with BMW's.  Heck, most parts are less expensive ($30 for a timing belt AND
tensioner!) and easier to come by (I can have ANY part the next day!) for
the Bimmer than for the SHO, and what is more expensive is usually allot
easier to replace (under 15 minutes to replace the fuel pump, try that on a
stock SHO!).  But, I still like the SHO for what it is :-)

Ron N. - Dalton, GA
90 SHO
89 325i
"It takes a man to suffer ignorance and smile"

----- Original Message -----
From: "louis grande" <luigigr8@yahoo.com>
To: <shotimes@autox.team.net>
Sent: Wednesday, June 11, 2003 10:42 PM
Subject: [Shotimes] Re:Twin Turbo SHO


> I'll have to refer you to shoforum.com to hunt down persons with some tt
sho motor experience. Use the directory or search features and look for
92turboshoprobe. Lance was trying to get a tt sho motor to run in a probe.
I'm not sure if he changed back to supercharger or stayed with the tt's. I
know he had it all piped and installed, started it up and spun a bearing
right away.
> Also look for offroadsho. Tom has a dune buggy with a sho motor. I don't
remember if he has it turbo'd or not yet. One of his buggy friends has a tt
sho motor setup on a dunebuggy, which would come close to what you might be
looking for.
>
>
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