I've searched and looked, where/who makes aftermarket pistons for a 3.1RWD?

I want to raise the compression from the stock 8.5 IIRC to at least 9, would like 9.5SCR though. I'm basically going for a slightly performance oriented stock rebuild. (higher compression ratio, more cam, maybe headers and possibly ported larger valves in the heads.) I was looking at northern auto parts, for their master rebuild kit, but I'd just as soon buy the parts seperate and get my pistons and cam that I want.

I'm looking to try and push the engine from the stock 140 to 180-200 Crank HP using the compcams Chevy 16-233-4 V6 cam (says its a good performance cam for the 2.8 with a lope at idle, and good top end power

opinions suggestions welcome.

Dont say go with a 3.4 though, thats in the future I just want this car to run, later in a few years I'm going to start a 3.4/3500 hybrid turbo project. (that or by a 4th gen with a 3.8 and use the grand prix parts to turbo that)

You can shave the heads and manifold to increase SCR. Custom pistons aren't cheap.

The DOHC pistons will give you close to 10:1 IIRC at most, I plan on using those in my new motor.

OP has a 3.1 block.

But there was never a 3100 DOHC motor made?

I didnt want to go custom on this build. just some domed pistons, but it appears no one makes them. I'll just stick with stock ratio then I'm not putting a whole lot into this motor, i just want my car to move again (its been siting for close to 2-1/2 years now.) maybe i'll rig a M90 from a T-bird SC up. about 6lbs of boost should do it

Federal Mogul made forged performance pistons for the 2.8L. So you could destroke it and raise the SCR that way.

If you do the M90 here is a thread that could give you some ideas. The M90 was mounted on a 3.4 in a 4th gen.
http://www.fullthrottlev6.com/forums...ad.php?t=37794

Go to www.kb-silvolite.com and scroll through the silvolite section, they have replacement pistons for every 60* ever made. A lot to read through, but it's the best recource.