Originally Posted by LSX.Tom

Rebuilding my LS1

I was going to get some new Forged Rods and Pistons For my 1998 LS1 out of a Camaro SS.

Not sure what to get or what sizes to buy, bore size, ring size? Does it come with rod bearings? Does it come balanced? I hear a lot of people go with wisco pistons and eagle rods. Flat top? I heard the H beam is stronger than the I beam. And arp 2000 rod bolts are good. I’m ready to fill my shopping cart but not sure what items to put in for my set up.

Car is currently Running Texas Speed 228R Cam, 243heads, long tube headers, and LS6 Intake manifold. Stock Crankshaft.

Car is gonna stay that way for a while, but would like to be able to handle Nitros or Boost in the future.

Originally Posted by Kfxguy

I'd run the summit PRO ls stuff.


Edit. Let me just say this. I had my summit pro ls pistons with me, went to my buddys house and he had a new set of wiseco pistons. we compared them. I could not find a difference except some grooves cut in the top ring land. The wrist pin was exactly the same too.

Originally Posted by That_One_Person

I read somewhere that their supplier(s) are Wiseco/K1. Pretty solid reputations as far as I know. Seem to be decent for the $ unless you wanted a big power/rpm build that might require some more stout pieces.

Edit: Buddy has a bare 6.0 block just chilling wouldn't mind making a 370/408 out of with one of these setups.

Originally Posted by LS1Formulation

I just assembled my engine with a stock crank and Summit Pro LS crank and rods. Steve Morris Engines did all my machining, and he was impressed that the rotating assembly needed nothing in the way of balancing. Said they spun it up and it was already good. It's quality stuff!

Originally Posted by Kfxguy

yea when I built my 5.3, the machine shop guy said nothing really needed to be done for it to balance out. Pro ls pistons and rods. I’m eventually building a 5.7 and I’m not gonna worry with balancing it. Waste of $200-$250

Originally Posted by Summitracing

@LSX.Tom,

Are the -3cc dome pistons good for nitros?

We have a variety of options for the LS1 in our Pro LS piston and rod combos. The pistons are modern 2618 forgings designed for boost and nitrous. They have thick ring lands for durability. The rods are top-notch 4340 H-beams precision-honed in the USA to +/- .0001". The rods come out of the box with ARP-2000 7/16 rod bolts with 200,000 psi tensile strength. We include a premium ring pack including steel top rings with Napier-hook second rings for maximum strength and oil control.

The main thing would be what is the end goal for the build. Are we building for N/A or are we building for boost? If it's going to be N/A for now and then boost down the road you'll have to sacrifice a bit of power now with a dished piston for the "end goal" of boost. Then the bores need to be checked. You may need to have them bored/honed to clean them up and go with the .005" over option. We recommend .004" piston-to-wall clearance with our Pro LS 2618 alloy pistons. You'll need to have the balance checked of the rotating assembly with the new pistons and rods.

7cc dish with 6.125" rod (9.7:1 with .045" head gasket and 243 heads)
- Stock Bore: SUM-PR36L8987
- .005" over: SUM-PR36L9037

-3cc dome with 6.098" rod (11:1 with .045" head gasket and 243 heads)
- Stock bore: SUM-PR368983
- .005" over: SUM-PR369033

Our H-beam rods will require narrow rod bearings. We recommend the Clevite H-series CLE-CB663HN.

Originally Posted by LSX.Tom

Are the -3cc dome pistons good for nitros?

Originally Posted by coryds07,

?????