stock48

iTrader: (17)

Looking for reliable combo's running stock sleeves, and main caps with forged internals. Is a honest reliable 1000-1100 RWHP too much to ask from the block without upgrading sleeves and caps?
Thanks! J

SirNemesis

At 4.000-4.005" should be doable, I think there are a few over that power level on here. Mine failed at about the 750hp mark but it was at 4.030".

stock48

iTrader: (17)

I plan on no more than 4.005''. What let go on yours?

1fast bird

iTrader: (22)

The only thing I would worry about would be the caps "walking" around. Get them pinned and it should be a good, light motor. Fireball on here was running a stock sleeved ls2 that finally let go at somewhere north of 1500 hp..... Ended up cracking a sleeve.

dmaxvaz

iTrader: (1)

With the weight of your vehicle, I would stay away from aluminum engine blocks, unless its a dart or RHS castings.

Blackpanther99

iTrader: (8)

I would go another route with a different block. Never know when that LS2 will give up on you.

dschmittie1

iTrader: (64)

My ls2 has pinned mains and is otherwise stock. Car dynoed 800rwhp on 15 psi.

LS2 block can be very strong with pinned mains and a little bit of block fill.

I think mightymouse was using an ERL aluminum block that was stock ls2 cubes

FlashWS6

iTrader: (18)

Stock cubes but not stock sleeves I believe

SirNemesis

This happened.

Slowhawk

iTrader: (12)

Yes it is to much to ask for. Has been done. Reliable, 1000rwhp,stock sleeves. Might be reliable for a little bit.

stock48

iTrader: (17)

Thanks for the replies good info. That's kinda what I was afraid of as well as main cap walk on the window style blocks. Also don't want flexing cyl walls and a binding crank costing my power. Do the blocks usually break at the top of cyl like pic above?

stock48

iTrader: (17)

Thanks for the pic! What boost, and fuel were you running ? Did you ever detonate engine?

SirNemesis

Australian 98 octane street fuel, which is about the same as 93 octane for you guys. Was only running 7psi when I noticed the failure, but it might have started cracking months earlier when I was running 15psi. No detonation on the logs, but no doubt it had detonated at some point.