911racer

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.

Thanks

Ed

Geoffrey

You may want to check with Rick Deman (845) 727-3070 who built the 2.1l turbo in the Orange GT4 car. It is not based off of a 3.6l case however.

analogmike

Be careful before investing, as the rules may change. A small turbo engine can easily get 100 - 200HP more than a 2.8 n/a engine. It's all $$$$$, so not a fair rule. One of the fastest GT3/4 drivers in the country is trying to put together one of these engines. If he does, he will win easily and probably be faster than GT3 cars, and the rule will get changed.

38D

I suggest you change you gearing first