trevmust

anyone deal with Diamond for making custom pistons? or is that something I should take to a builder to ask for help with?

Jontall

It's always better to buy an off the shelf piston and hone for its size. Custom pistons are expensive and take a long time receive. Only do it if you need something really special and if that's the case, take it to a professional engine builder.

JAH

If there isn't an off the shelf LS piston, could you use a gen I piston? I would think you would have to have the valve reliefs re-machined. At what point does a piston become a custom piston?

Re-machining valve reliefs, changing the pin location, odd size bore, any of the three? Or other items?

Jontall

The post is too random to answer... He is not saying exactly what's needed.

trevmust

i want a cr of 9.5, and i cant get that with an off the shelf piston in the bore size i want. What do i do? (is that better?)

trevmust

i need a -16cc piston and the closest i can find is -8

FLYZNTN

JE sells a 4.075" x 3.622 (6.125 rod) -19.6.

JE Pistons

That's the closest I could find to a 4.075 x 3.622 -16 cc piston that is off the shelf.

I think Wiseco could build you a reasonably priced set of what you are looking for but, honestly, I've never bought a set. I'm only going by word of mouth so don't take that as gospel. That said, "reasonable" is a relative term. What I mean by it is 30-50% more then an off the shelf piece.

IMO, the best thing to do is contact the manufacturer directly or submit a form:

http://JE -Custom.pdf

http://Wiseco - Custom.pdf

trevmust

that doesnt work. i need a 4 inch stroke piston.
4.075, 4, 6.125, 1.105

Black_Phantom

With that odd CH plus 4.075" bore it's gonna be custom set.
you can contact Brian Tooley Racing for a custom set of wiesco, he is a dealer

trevmust

sorry I need -18 (dish). whats the max bore on a ls3 block? I've heard that its 4.1, and anything below (4.1) as long as i can get it to give me a 9.5cr, i'm good with it. and i want to be able to supercharge it too, so the closer to 4.075 I am the happier i am lol

trevmust

the form looks tricky, so when i'm ready I'll contact a builder about it, see what he says. Maybe he will even let me help put the engine together, cuz I'm kinda afraid to do it myself, but I don't want to be left out of the process.