[Supras] 57 trim CT@ boost capability

Thu Dec 27 23:57:33 CST 2007

Joe:

   
    Yes, I did get the Setrab pix.  One of these days I intend to 
upgrade the oil cooler, but there is so much to finish now that I have 
time off until January 2nd.  Got the hard pipes done with 2-1/4" steel 
tubing run through the stock inner fender opening, but I did need to add 
an additional elbow where the flattened offset section of the plastic 
was.  Had to stop short of installing the Tredstone intercooler though, 
not accustomed to doing this kind of work anymore day after day as a 
senior.  My wife complains about the odor of Ben-Gay, but then again she 
thinks I'm nuts for working on cars instead of wanting to visit family. 


    You should see the NAPA clamps.  Yes, they are worm type, but you 
have never seen anything like them.  I've used T-bar types before, 
especially at the turbo outlet.  The NAPA clamps have Belleville 
washers, though, so they are self-tightening.  Have T-bars here too.  
I'm going to wind up with a nightmare of a plumbing job with NAPA 2-1/2" 
radiator hose off the intercooler down to 2-1/4" for connections 
elsewhere.  I've refined the "soldered wire bead" hose holding technique 
pretty well to the point where I'm 99% sure that I will not have a hose 
blow off.  The NAPA radiator hose looks a bit skimpy but it must be 
built to withstand 15 PSI hot.  I'll use those pieces with 90 degree 
bends to come down off the IC connections and then switch down to 
2-1/4".  No one seems to have 2-1/2" X 2-1/4" reducing elbows in stock.  
I could pay my local speed shop $60 EACH for them overnight but I could 
also burn $100 bills.


    The treadstone has angle aluminum at the ends. At least the oil 
cooler end is almost a bolt-up with a little drilling.  I need to make 
an extension plate for the hose end. 


    Thanks for the pix.  Take care and have a good new year.


       Bernie

joe at wilmcd.com wrote:
> Bernie, I'd probably just order up some nice SS t-bolt clamps. They'll
> cost you less than that.
>
> PS: Did you get my Setrab install pics?
>
> -Joe
>
>   
>>     The NAPA here sells worm drive clamps but they are nothing like you
>> have ever seen.  The are super heavy duty, 3/4" wide, with a stack of
>> Belleville washers under the screw to hold tension.  They are $5.00 each.
>>
>>
>>        Bernie
>>
>> Jim Jobe wrote:
>>     
>>> Just a tip, Napa also sells t-bolt clamps.  They are
>>> much better than any worm drive clamp.
>>>
>>> On Wed, Dec 26, 2007 at 09:04:45PM -0500, berniek at technicaldevelop.com
>>> wrote:
>>>
>>>       
>>>> 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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