I'm in the process of planning to turbocharge my n/a using stock t2 components.
Therefore i have to space the turbo out from the engine due to the large n/a LIM. I am planning to make a spacer between the turbo and manifold.

Could i weld a runner off of the spacer and mount an external wg there, and just wire (or weld) the stock internal wg shut? Would there be anything wrong with this, or anything else i should consider?

 

how big of a spacer are you going to use?

 

i think you would find plumbing it pretty difficult with clearances etc

 

like the manifold in the second post down --> https://www.rx7club.com/2nd-generation-specific-1986-1992-17/pics-aftermarket-turbo-exhaust-manis-643330/

except just one wastegate?

 

...and if that is the case, I think your manifold would have to be more of a plenum than 2 individual runners, or else if it was mounted on just one runner, the other runner would still flow exhaust to the turbo.

And if you have to go along with the single plenum spacer, I dont know if the flow characteristics would be ideal for something controlling the boost (surges, turbulence, etc...).

 

It's been done. Yes, you can do it. But if you are going through all that trouble, why not just build a manifold in the first place?

 

Ok i drew a highly detailed intricate design of exatcly what im talking about...

http://www.splatterspaintball.com/up...%20diagram.JPG



In case you are wondering all the angles will be right angles. Meaning the angle of the turbo and spacer flanges will be same as if the turbo was bolted right to the manifold.

I think it should work. I would be able to use a much larger wg instead of the stock or ported stock wg.

 

I haven't done any test fitting yet but just from eyeballing it i would imagine between 2" and 4" with no divider, just square tube.

 

The size of spacer needed is 2.5" outside to outside. Any smaller and the compressor hits the lower intake, any larger and there's no clearance with the frame rail.

 

Isn't that the distance for spacing the manifold from the block?

I'm going to bolt the manifold directly to the block and then spacing the turbo off of the manifold.

I would imagine that since it will be spaced at an angle ill have to make the space longer than 2.5"

 

Oh, oops.