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edbaus edbaus is offline
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Join Date: Dec 2001
Location: Ohio
Posts: 4,906
Small displacement twin turbo for pca gt4

I was at Mosport this weekend racing in GT4s.

One of my competitors was there with a very nice motor setup that I would like to consider replicating for myself.

He had a twin turbo setup using a 3.6L case (I crawled under and looked)

Now the limits of gt4 is a displacement of 2.8L and a turbo adds a multification factor of 1.3, so the largest displacement turbo that you can build and still be in gt4 is 2.15.

I have toyed with the idea of building myself a nice turbo motor for the class. I had never thought about starting with a 3.6L though. I have plans for a sleeved down 3.0 to give the 2.8L displacement.

How hard is this, what would I have to do. De-stroke, custom pistons, what else.

This motor seemed to do extreemly well for him. Last year his fastest time was 1:37 with a 2.8L na, now he was able to hit 1:31.


Old 08-01-2005, 05:54 AM
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