One of the major elements of this build is the turbo system, and we've been contemplating the best way to do the turbo install for many months. I think I finally have an idea of what we're going to do.
There are many factors that needed to be addressed in designing the system, including:
- It's an Oldsmobile, which means you can't just go buy pre-made turbo headers
- It's going to be street-driven, so the headers need to be up to the task from a strength standpoint
- It's a mechanical 4-speed, so the driver side has a linkage clearance obstacle
- We didn't want to cut the car apart to accommodate the system
- Olds manifolds don't fit if you point them forward to plumb the piping in front of the engine
- Olds manifolds are not able to be flipped vertically to point the outlets up
So after much consideration, I think the latest idea is going to require the least amount of fabrication time and the most simplicity. Here's how it goes...
We're going to use the factory Olds exhaust manifolds, pointing in the factory direction. The passenger side manifold actually has a second port where the factory 2-1 exhaust system cross-over pipe would connect.

So we're going to run the exhaust out the driver side, under the motor like a factory 2-1 setup, then out the passenger manifold like a single exhaust car. Then, the plan is to have the exhaust make a 180 degree turn around under the car and come forward up the passenger side. We got this idea from the Turbonetics 2005 Mustang turbo kit...


Then, the turbo will live up on the passenger side of the engine bay, and dump it's exhaust back down the passenger side. This way we're clear of the clutch linkage on the driver side. The turbo will then pressurize an intercooler in the grille area, and force the charge up into the FAST EFI throttle body.
Word on the street is that the cast iron manifolds will handle the heat better than mild or stainless headers, and that the power levels are similar. We'll probably have them coated with some exotic high-temp coating and then milled flat for good sealing.
Another factor is that we already have these in-house, and the fabrication will be minimal. It's such a simple idea, we feel it would be almost irresponsible not to try them. If not, custom stainless headers are only a couple thousand dollars away....
Of course, this strategy might change if we have a bunch of problems, but that's the current plan.