I am building a LS6 with a new block, 3.898 bore. I'm using a '02 Z06 cam and heads,stock crank and rods. I want to use forged pistons but having trouble finding forged pistons for a basic stock set-up (flat tops). I might have to mill the heads .040 to clean-up, so valve relieving on a flat tops a plus. Lunati makes a set #LS1J that is an NHRA piston that is almost right, but it uses .927 wrist pins.

 

Check out http://www.texas-speed.com/ I got my forged short block from them with MAHLE pistions flat tops with -2cc relief cut. They have several brands and alot of 346ci pistions.

 

mahle

Item:
Mahle Motorsport Forged 346 cid LS1 Flat-Top Piston Set: 3.898" Bore, 3.622" Stroke, 6.098" Rod Length, .945" Wrist Pins, 1.340" CH, -1cc Dish; Wrist Pins and Piston Rings Included
Price: $509.99

 

From what I've seen, Wiseco has the niceset 'off-the-shelf' forgings. JE, Mahle, and Diamond also offer very nice pieces.

 

I'm not seeing this on their site...

edit: Nevermind, everything is under Corvette...

 

Mahle's here from Texas-speed with their Crower Rods also. It's been a Great Setup for me so far!

 

Ok, I looked at Mahle, then I also found something from Lunati. I'll probably end up getting Mahle's, but how do these two products compare? I'm not too sure on the specs that aren't shown... this is for a Nitrous setup btw, planning on going up to 400 HP dual stage.

Lunati 346: http://www.holley.com/products.asp?product=LS1J

vs

Mahle 346: http://www.texas-speed.com/item_deta...ProductID=1329

Thanks!
-somebody

 

Your going to need rods for that man. You cant just go shooting the moon on stock rods, and ****. You need custom pistons for that much juice to live as well. Max I would put on the stock replacement Mahles would be 225hp, maybe 250 if it were two staged and/or progressive. But feel free to blow it and see how long it lasts. Thats why there are so many forged bottom ends being built and sold.
B/w the two, I would go with the Mahle, already coated! Other than that they are so nearly Identical. Also the Mahle has a better relief area around the wrist pins.

 

Well of course I will, lol. I just wasn't sure of the difference in those two pistons. I'll be getting that set of beefy Lunati rods: http://www.texas-speed.com/item_deta...?ProductID=796

Thanks for the clarification though

 

Never heard of Mahle before I got mine. Turns out (this is what I read) they are the largest piston manufacturer in the world. All NASCAR run Mahle. Got mine with 3.905 pistons, pins, rings and 6.125 forged rods for $750.00. Ebay. I believe I read that factory cast LS6 pistons are Mahle also.