XiWastedYouthiX

Tried to search a few times, but no luck just people wanting to sell them which is never a good sign, but a fresh ls1 with speed pro forged pistons and scat I beam rods fell into my lap, so my question is, what power can it withstand without coming apart, is this setup stronger then factory or a step in the other direction? It will determine if this will end up in my fair weather daily driver or my weekend car...Any info would be appreciated

2000PewterT/A

Well I have limited experience with Speed Pro pistons is ls motors but I remember they were a decent piston for the money in sbc's. Scat rods are a good budget rod. Hopefully someone with more Speed Pro experience can chime in.

redtan

iTrader: (5)

They are most definitely a step up from factory, especially over the ls1 rods which were weaker than the current LS2/LS3 rods which are pretty good from the factory.

You still get forged parts (aluminum in pistons, steel in rods) and ARP bolts in the rods. For sure better than any cast stuff that came originally in the LS1.

Now these may not be able to hold down 700+ rwhp like other forged stuff, for a naturally aspirated fair weather driver they would be more then enough.

XiWastedYouthiX

o ok cool, thanks alot, i have no experience with them and a friend said they were brittle so it made me nervous, I was considering spraying this engine

redtan

iTrader: (5)

Again, not anywhere as brittle as the original LS1 rods that's for sure.

Depending on how much you want to spray, you may want to look at beefier h beam rods.

chrisfrost

iTrader: (8)

Just to clarify, the stock Ls based gen3 conn rods are forged powdered metal so They are somewhere inbetween cast and conventional forged rods as far as strength is concerned. I agree that the Speed Pro forged pistons and the Scat rods are for sure a click or two above factory . The only thing I don't like about forged pistons in general is the fact that They expand more than cast hypereutectic slugs so piston to bore has to be looser .
The main killer of rods is going to be rpm's . The stock 1st design LS1 rods(second design bolts or ARP bolts) can safely handle 650-700hp as long as You keep it under 6800 r's and rotating assembly is balanced well and assembled correctly,,,,,,,,etc