R_trim 93GT

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I haven't done much posting over here in a while and figured I would start off with a build thread for anyone that might be interested in seeing a custom twin turbo build on a C5 Corvette.

The build was set in motion right after this picture was taken:

R_trim 93GT

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The goals for the build are to come up with something that is simplified:

Simplified meant for the most part:

• Easy access to the turbos
• Very limited exhaust piping
• Air filters but no inlet piping if possible
• Gravity drain
• Make use of available exhaust manifolds
• No major relocation of accessories or systems

R_trim 93GT

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I said good-bye to the proven TTiX kit




And went shopping..

silvea

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lol I'd be stoked if Walmart carried that stuff. I live right next to comp turbo though. So still just a short drive

R_trim 93GT

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Nice, do you ever stop by there? This was probably one of the most expensive items to ever fit in their shopping basket.

R_trim 93GT

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Here was the initial plan



After some mock-up, I knew there was no turning back.

A teaser pic to show where this is headed:

This will check the box for very limited exhaust piping.

R_trim 93GT

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A joint effort between TopSpeed Motorsports and Extreme Turbo Systems produced a pair of PTE-6870 turbos with a ported S cover and 0.96 A/R T4 turbine housing.





Next, AutoMods, LLC provided the Precision BOVs and wastegates.


(2) - 46mm wastegates




(2) - 64mm BOVs

R_trim 93GT

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I went through JS Fabrications to order a "1500 HP" intercooler that was designed in-house and it was fabricated by Bell Intercoolers.

Here's a quick shot right after it showed up and before mounting it to the car. The fin density on the core is insane.



I was also able to source a "starter kit" consisting of misc aluminum and stainless bends, couplers, and clamps. This would prove to come in handy as the project progressed.

R_trim 93GT

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The turbos were in hand but a few more key pieces were needed to get the turbos located and begin routing all piping.

304 SS T4 Flange with mounting ears from Motion RaceWorks





321 SS T4 transition pipes from Specialty Products Design

RealQuick

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sub'ing for a cool build

silvea

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i have stopped by. They are super cool guys, but it's all work no play. They are helpful beyond necessity just not a place where you shoot the ****

R_trim 93GT

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That's good to hear. Do you have any experience with their line of turbos?

R_trim 93GT

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I've been thinking building something like this for a little while now. There are a few options out there these days for turbo kits that are readily available but I kept coming back to the idea of locating the turbo in the fender and routing the downpipe right out the fender. This picture probably shows the concept the best and is where the pro mod style name originates. The front half chassis mods on this car are a little farther than I want to go at this point, but the car will be getting a front engine plate this go round.

R_trim 93GT

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I wanted to hard mount the turbos to the frame and getting the location right was going to be key to the success of the kit.

Constraints:

They had to be tucked in tight to give room for the 3.5" downpipe.
They had to be up high enough to allow for a gravity oil drain.
A filter was desired for street driving and the inlet is 4".
The inner fender apron needed to remain intact to protect everything from dirt and water.
The car is low, so ground clearance is important.
Unless necessary, cutting into the frame and firewall needed to be avoided.

In short, move what needed to be moved to get a good location and then work out routing the piping and mounting all other items afterwards.

I started with the driver side knowing that it would be tight with the clutch master cylinder and brake booster on that side. The external fuel lines, boost control solenoids and meth pump were removed to make room for the turbo. These items would have to find another home later.

1/8" plate welded to frame




Driver side turbo mounted

R_trim 93GT

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Now it was time for the passenger side. In the picture below, the ECM has been removed as well as the vacuum canister, the battery mount has been deleted and the 45 degree brace needs to be cut out. Also the rubber firewall drain or "udder" has been removed. All of this will be addressed later after the turbo and piping is in place. The battery will go to the rear, the vacuum canister will be relocated and the ECM will move to the engine compartment. The plastic hasn't been trimmed yet in this photo.




1/8" plate welded to frame




Passenger side turbo mounted

RonSSNova

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Cool build. Keep the photos coming!

Ron

AnotherWs6

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This guy is a **** tease.

R_trim 93GT

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This is the point of the build where the C5 purists will want to look away. :rofl:

Locating the hole




Holesaw and cordless drill




Checking initial fitment

R_trim 93GT

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Putting the pieces together




Ready to mark for the slash cut




Complete Downpipe




Passenger Side Done

R_trim 93GT

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The driver's side was completed the same day. This went much quicker than anticipated.