1redvtss

WTF? Ls1 rods???
Guys please someone help!!! I have a alloy ls1 it requires a rebuild and I can't make sense of the con rod sizing? I think mine being standard are 6.098 but if I want H beam they come in 6.100 or 6.125? Will these be fine with a normal crank? And standard pistons??? Or do I need shorter pistons to accomidate there extra length? If so how much shorter and is the pin size different on these rods? I need new rods as I spun 4 big ends but pistons seem fine I just want it standard but stronger. Cheers guys!

KCS

iTrader: (20)

You'll probably need new pistons since they use a press fit pin. Usually, the pistons are ruined when you press that pin out.

1redvtss

I wanted to replace them but I am very unsure about pin height sizes to suit rods? If I could find a set together that fits standard crank bore and compression ratio I would jump at it.

KCS

iTrader: (20)

For starters, you have roughly 9.240" for deck height, so with a 3.622" stroke crank, you have to subtract half of the stroke (1.811") and the rod length (6.125") and it leaves you with roughly 1.304" for a piston compression height to get "zero deck". Wiseco offers a K398X3903 piston with a 1.304" compression height and a .927" pin (for aftermarket rods) for a 3.903" bore.

With this combo, you can either use a .040" head gasket without surfacing the block to get .040" quench, or you can use inexpensive GM MLS gaskets with roughly .052" compressed thickness and surface the deck of the block to tighten up the quench.

Sales2@Texas-speed

iTrader: (5)

What pistons, specifically, are you trying to run? A part number would be beneficially so we can make educated recommendations for you!