andries2

Sorry if this question has been asked before. I am looking for forged rods and pistons for a 3rd gen 4.8, block is in very good shape so I was hoping to leave the block alone (stock stroke and bore) just a quick hone and resurface the mating surfaces. Any input would be much appreciated.
Edit... will be running stock crankshaft.

G Atsma

What is the intended use of the engine? The stock rotating assembly is good for at least 600-700HP.

andries2

had a cam in it for the last couple years and wanna throw boost at it now, hoping to be real close to those numbers, almost looking for reassurance after all this work.

G Atsma

Some have thrown 1K HP at the stock bottom end with no ill effects, and others grenaded at 750.
If assembled with care and proper clearances, the stock lower end is plenty stout.
Sounds like you are taking some precautions to avoid future issues.
The parts are very good. Assemble with care and quality bearings, gaskets, etc. and you should be fine.

Che70velle

iTrader: (6)

The 4.8 has a strong crank because it’s a shorter arm (stroke). It’s stronger than the 5.3 by a nice margin and loves rpm to boot. Don’t be afraid to throw the adder at it.

KCS

iTrader: (20)

Summit has pistons and the correct length rods for a 4.8L.

https://ls1tech.com/forums/generatio...ls6275945.html