[Supras] 57 trim CT@ boost capability

[Jeff Mohler]

IIRC, he is using mild steel.


On Dec 27, 2007 8:04 AM, Dave Henry <daveh at to4r.com> wrote:
> Are you using mild steel or stainless?  FYI, I used mild steel for
> intercooler piping many a year ago, and I ended up with condensation in the
> pipes and rust.  I had orange streaks throughout the IC piping and into the
> throttlebody/intake manifold.  I did not like the idea of the engine
> injesting rustwater so I changed the piping out to aluminum.
>
> DaveH
>
>
> ----- Original Message -----
> From: <berniek at technicaldevelop.com>
> To: "Walker, Brian (Rich. Dist)" <Brian.Walker2 at VDOT.Virginia.gov>
> Cc: <Supras at supras.com>
>
> Sent: Wednesday, December 26, 2007 8:04 PM
> Subject: Re: [Supras] 57 trim CT@ boost capability
>
>
> > Brian and group:
> >
> >
> >    Just took a break from making up hard pipes from 2-1/4" thinwall
> > steel tubing.  The Treadstone Spearco knockoff is due tomorrow.
> > Although I enlarged the stock air box opening, the IC discharge hardpipe
> > won't fit there due to the width of the HKS filter on the snout of the
> > Lex AFM and the filler neck for the windshield washer.  Yes, the HKS
> > lets a lot of dirt though, so it will be changed to something else,
> > probably with 3" dryer vent hose to an element located below the
> > headlight. I'll put a grille of some sort in the bottom cover there.
> > No floods to worry about here.  In the meantime, I'm very careful where
> > I drive.
> >
> >
> >    I'm using the stock routing for the IC discharge pipe with a
> > coupling hose where it emerges from the fender well (have my BOV in a
> > 2", actually 2.4", copper tee there for connection to it).
> >
> >
> >    The car in question is a '91 with 550cc, Lex, 57 trim CT26, 3" turbo
> > back and everything that goes with it.  Had a stock '90 before, only
> > moving the wastegate actuator diaphragm connection to the 3000 pipe.  On
> > cool days I noticed almost no boost difference (plenum boost transducer
> > only operates dash gauge, nothing more).  On 80F days, there was 2.5-3
> > PSI more (actually 3 PSI occurred when near 100F) with everything
> > stock.  Nonetheless, I'm now running 15 PSI at the intake plenum, so the
> > upgraded intercooler and piping are a safety measure.
> >
> >
> >    NAPA carries very good worm clamps with Belleville washers and
> > radiator hose over 2-1/4" ID.  Wall strength seems more flexible than
> > the Supra hose, however.  I may try some.
> >
> >
> >    Bernie
> >
> > Walker, Brian (Rich. Dist) wrote:
> >>
> >> Bernie, you're still using stock IC and pipes right? If you're seeing
> >> 15-17 psi at the manifold, you're already beyond 18 psi at the turbo.
> >> Replacing the pipes and IC with something more headloss efficient
> >> generally frees up 3 or so psi so I'd bet you're actually producing
> >> 18-20 at the turbo now.
> >>
> >> Not sure why you you didn't see a difference when switching the WG
> >> signal (psi) location. Seems if you moved it to the manifold, there
> >> would be 3 or so psi you wouldn't be accounting for (assuming a manual
> >> controller) and you'd see the normal max pressure plus any headloss
> >> you are now bypassing.
> >>
> >> Brian
> >>
> >> Date: Mon, 24 Dec 2007 19:59:08 -0500
> >> From: "berniek at technicaldevelop.com" <berniek at technicaldevelop.com>
> >> Subject: [Supras] 57 trim CT@ boost capability
> >> To: "Supras at supras.com" <Supras at supras.com>
> >> Message-ID: <477055DC.4040005 at technicaldevelop.com>
> >> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
> >>
> >> The fellow (Mario?) at Performance Techniques tells me that the 57 trim
> >> mod is good up to 17 PSI from a bearing wear standpoint.  I'm getting
> >> 15-17 PSI at the intake plenum so I'm over that at the turbo.  A
> >> Treadstone Spearco knockoff is going in later this week, as are 2-1/4"
> >> hardpipes, to get the turbo discharge pressure down.  I do know that
> >> moving the waste gate actuator connection from the turbo discharge to
> >> the 3000 pipe caused very little boost increase under all but hot summer
> >> conditions (then it was 2.5 PSI difference with an all stock engine).
> >>
> >>
> >> Anyone have experience with life of a 57 trim CT26 at probably 18 PSI
> >> boost at the turbo?  Already thinking about an upgrade.  TO-4?  Needs to
> >> fit Lipp elbow and stock exhaust manifold.
> >>
> >>
> >>     BernieK
> >>
> >>
> >>
> >
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>
>
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