69Tinindian

Who has put alot of power thru a ls2 floating rod?...trying to decides if I should use the set I got for free or buy h-beams. I only shooting for 700whp but id like to turn it up with good gas and go for more eventually. And input helps

HexenLord

Run em. They'll probably handle whatever you plan on throwing at them.

RonSSNova

iTrader: (3)

Hey,
If they need to be resized, I'd just go ahead and get the better aftermarket rods.
Have you bought the peestons yet? If so, your choices are limited due to the .944 pin size.

Ron

69Tinindian

Ya I built pistons from wiseco for a .945 pin. I thought the stock were 945 atleast thats what wiseco said

RonSSNova

iTrader: (3)

.944 or .945, I forget. Either way, most aftermarket rods are .927
Ayron

69Tinindian

Ive had a hell of a time with pistons and rods. Ordered rods 6.100 .927 then called wiseco they told me the lowest compression piston is 10:1 for that rod in my bore. Otherwise they'd be custom. So I wouldve had to buy heads since im on pump to get the comp down. So I sent the rods back. Ended up getting some ls2 rods for free and read around that they're .945. So I found some wiseco pistons that'll give me 9:1for a .945 stock length. Myles called them and theyre out and have to make them, wont be done till the 22nd. I think youre right tho theyre .944. Alot of the threads ive read said .945. Now I may be shopping for rods again.

69Tinindian

Eagle makes a rod 6.100 in a .945. I talked to a guy at scat and he wasnt sure of the stock ls2 small end diameter

69Tinindian

I know the gen111 rods hold up at 640whp thru a th400 and the pistons let go before the rods. I know ive done it twice. So id was hoping the floating dimple rods being alot beefier could hold alot more. I hope I dont find out in a bad way.

HexenLord

Pistons usually let go because of a bad tune or excess heat. Pistons often withstand high power figures very well as long as they remain cool and there is no detonation. I'm going to guess that if you've lost pistons twice, it was a bad tune, or poor steam line venting. 95% of the people that break parts on here from power alone are usually breaking the rods. Busted ring lands are NOT a sign of making too much power.

There was a stock Gen 3 4.8 on here that broke 1000whp before the rods let go. 4.8s have the best chance at letting the rods stay alive due to rod length and rod/stroke ratio. Less leverage is put on the rods. There have been a few Gen 3 5.3s in the ~900 whp range. I've seen several stock LS1s over 800whp on gen 3 rods.

That being said, there are more than a few 1000whp gen 4 rod/pistons setups out there. There is currently a gen 4 rod/piston 5.3 trying to break into the 4s in the 1/8th mile (which it may have already done, but was running 5.0xx last I checked), which puts it up to at least 1200whp. The current stock bottom end LS record is on gen 4 rods/pistons and is probably around 1100 flywheel hp.

Ever seen gen 3 and gen 4 rods and pistons side by side? The gen 4 rods are MUCH beefier. I don't doubt they'll handle 25-30% more power than gen 3s reliably.

69Tinindian

I know it was detonating for sure. I was asking for it on pump gas. It was making good power for along time before it let go. Little more conservative on timing this time around lower comp and forged pistons

Forcefed86

iTrader: (4)

1400whp and 7800 rpm is the highest I've heard of on a gen4 rod. Was on a 5.3, OE crank and block as well.

https://www.facebook.com/BrianTooley...levant_count=1

asubennett

iTrader: (6)

Low end torque is what kills rods in every motor. It is also what makes a street car fun. I bet that thing is the lamest set up ever on the street but on the track who gives a sh*t. Unreal power for 4 bolt heads, stock short block less the rod bolts.

Forcefed86

iTrader: (4)

It has aftermarket pistons as well.

asubennett

iTrader: (6)

Ha - that's funny. If he went through all the trouble of replacing the pistons why not the rods too? Point proving or?

69Tinindian

Even tho im only planning on making mid 700whp. The rods would be fine. But like you said im having a hard time with the idea of forged pistons on stock rods. I know later down the road ill be regretting it as it will be be the weak link. Now im also wondering why im going thru all this work and money to forge a 5.3 and not a 6.0! It never end haha