Cwarta

iTrader: (12)

WHat do you guys think the RPM limit would be for this engine, based on the rotating assembly alone. AS in, when would you start to get scared it may fly apart.
Stock LS3 crank
Manley platinum series flat top pistons
6.300 lunati voodoo h beams with 2000 arp bolts
King bearings and Childs & akerly rings
all new machinework and balancing etc.

Im thinking it should be able to take 8,000 all day long.

Obviosly I know cam/valve train is going to play a huge part, but I want to know what the botoom end can take on a regular basis.

DietCoke

iTrader: (18)

will spin as high as your valvetrain will let it. balancing is key to rpm

Cwarta

iTrader: (12)

Thanks Diet I appreciate the input! I fully understand the precision machining required to make a reliable high rpm motor, along with supporting topend.

I posted this question on a Gto forum (not ls1gto) I had some complete idiots trying to tell me anything over 7,200 and it's going to toss rods out the side. I've seen stock rods with rod bolts handle 7,500 with no issue, so I just deleted my post instead of wasting my time with those "Internet engine builders" , no reason a long rod motir with quality internals can't live @7,500 or even 8,000

TurboBuick6

iTrader: (2)

I would have to think 8K would be doable.

snowman47

I know this isnt apples to apples but there are guys running $400 bone stock, junkyard 5.3's in demo derbys turning them 7500 a half hour at a time. I think you do not need to worry about turning a forged aftermarket rods/pistons to 8k or a little more.

Cwarta

iTrader: (12)

Agreed, especially one with better than stock rod angles like this one will have!