Sleeper KA-T Photos. Post them up!!!

[StryfeS13]

I'm not really sure what's going on with this forged piston talk...but forged pistons do expand more than cast pistons.

Forged pistons use a different alloy(2618/4032), and yes, they do expand more...only like 15% or something, which is nothing if you put it into perspective.

With forged pistons or any race motor you should definitely wait till it gets up to operating temperature before romping on it. The expansion isn't what screws forged pistons up...it's the expansion rate. You gotta let them warm up before you romp on it.

Notice I'm not saying you have to SIT there for 10-15 minutes, but as with any motor you should let it warm up. I usually wait for like a minute and then drive slowly, shifting at like 2-3K until it's warm.

Call me an idiot, but I have had no problems ever. And everyone else I talk to about building motors, etc, will say the same thing about forged pistons.