90 TR Twin Turbo build

Ok, back at it again...The past couple of weeks been playing around with many possible turbo layouts...I've had the turbos installed in almost every concievable configuration and finally decided to go with what I'm posting up now (everything is always a compromise)...At first, once the stock muffler was out of the way, it looked like there was a ton of room, however, as usual once you start putting parts in, the space quickly disappears....
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This is a top view...I decided to mount the turbos as close as possible to the engine. The turbos will be affixed to the engine, so it all moves together. The turbos will be supported with small chrome moly tubing that picks up off the back of the transfer case. The turbos will be mounted on small spherical rod ends to allow for the exhaust growing. In the aforementioned dyno pull, the main pipe grew over a 1/4" in length. By moving the turbos in close, I can get them up high enough that the gravity old drain backs will work properly and I'll still have hood clearance for the support tubing. The right angle aluminum pieces mounted to the air cleaner tray bolts are temporary. From this pic, you can also see the air inlets (aluminum pipes in the center). The bends will be modified further (probably 120 degrees) so that 2 - K&N air filters will pick up air from roughly the same factory position. The turbine outlets (3" SS pipes, which appear to be straight up and down) are basically a straight shot to the original factory dual tip muffler outlets in the lower rear valence.
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This pic shows the turbine inlet plumbing with integral Tial wastegates, the internal springs are set to 6 psi.
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These two pics show the left and right turbos from underneath, you can now see the turbine outlet pipes are angled towards the back of the car...in the first pic posted today, they almost look vertical (optical contusion I guess)....
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Heat consideration is always a concern with street driven turbocharged vehicles. That's why I wanted to make the turbine outlet plumbing as short and direct as possibe... Honestly, don't think the heat will be that big of a problem in this vehicle...compared to the Corvette with twins on it and a completely enclosed hood, I think the vented rear hatch will be a big plus. I will install heat sheilds where necessary.... and am planning on using lightweight high efficiency brushless DC motors for the fans to aid in cooling.

 

Thx Joe, that's very helpful

 

J&J,
The CF turbine wrap/cover is what I use on my TT Vette, that's what I'll use on this project too...Thx for the suggestion. They work great, on the previous CF hood I had on the Vette, the paint blistered a little above the turbos, once we installed those CF covers, no more blistering. I've got miles of clearance on this project compared to the Vette, so I'm still confident that heat won't be an issue....

As for the fans, we used them on our ProMod car, I'll look up who the vendor was and post up later...They're extremely light I remember that and used brushless motors..

 

Thx for the vote of confidence,,,pls see posts 34 and 48...

 

More stuff to come shortly, thx for the kind words...Turbos are mounted, waiting on 321 SS bends out of CA...the Titanium bends turned out to be cost prohibitive, I only needed 4 and the minimum run from the Boeing supplier was 25 pcs...bummer:-(...I think the 321 .035 wall will be close enough, weightwise.