ls2 block

[chevytoo]

A couple of us guys are having a debate on how much power you can throw at one of these blocks. It is a turbo aplication. Any help would be great and maybe quiet down the shop. lol (ls2 aluminum 6.0l)

[TTDolson]

North of 1300 would be dangerous.

[Suicidal Racing]

i'm not sure how strong the aluminum blocks,i know the ls1 and ls6 aluminum blocks u are limited to about 800hp or so.

[chevytoo]

Has anybody here broken one? I know this is a long time debate.

[Suicidal Racing]

go onto ls1 tech and ask..i think most will tell u to go with a lq4,lq9 or lsx block

[SLED28]

How much power are you looking to make with the LS2 block?

[chevytoo]

1200rwh is what I need to make.

[qwiknotch]

I have heard 1000 with the aluminum and 1100 with the iron block with the billet main caps and main studs..
you buy the truck block, main caps and line hone it and prep the block, you have more than half the cost of the LSX block.

[eb02z06]

I've made over 900 rwhp through a LS6 block 347 and never hurt it.

[qwiknotch]

what else is in your combo?

[eb02z06]

Procharger F1C 18 psi, CNC ported Patriot LS6 heads, custom cam, Pump gas and meth.

[Collinsautomotive]

I have yet to see a block actually have a hard fialure. I have seen the cam bearings spin though with big power. Usually they spin due to block flex and distortion. I have also seen the center main bearing due the same thing.

I've made over 900 rwhp through a LS6 block 347 and never hurt it.

[eb02z06]

I don't think 1000 rwhp is out of the norm if you pay attention to all the details-no prob if you just want the number and it's a street car. BUT if you want more than 1000 and are going to race it , then the iron blocks make clear sense.

[SLED28]

1200 + rwhp is definitly steel block territory. Either a 6L or the new Bowtie... What size turbo are you using?

[zracer]

What mods would you need to make to the 6.0 iron block to hold up to a 101mm turbo or would the LSX be a better choice. Just trying to make a good choice. Thanks for input.

[Suicidal Racing]

a 101 and a good ls1 heads is around 1500hp for sure i would say.

a lq4 block migh hold up to that with billet main caps and alot of block work and filled,but the price that would bring you up to i would say just get the lsx block,there rated for 2600hp

[315plus]

What mods would you need to make to the 6.0 iron block to hold up to a 101mm turbo or would the LSX be a better choice. Just trying to make a good choice. Thanks for input.

with billet caps, line hone, price of block, etc. you are upwards near the price of a lsx block, and that block is the ticket "hands down"

[zracer]

Thanks that is what I was thinking.. I wanted to weigh the cost to get the 6.0l up to standard or just buy the LSX. How much prep does the LSX require i.e. bore, hone etc. Looking to build a 427 with L-92 heads

[JimmiSizzzle]

Why are you shooting for so little cubes zracer??? You can detune for traction, but cubes rule on the top end.

[Suicidal Racing]

some people like little stroke high reving engines..seeing its going to be turbo theres no need to but a monster crank in it..

[zracer]

works for lynch and many others. I owned a 99 camaro and still have a 02 WS-6 and always wanted to do a LSX motor but not in the daily driver. Intend on putting it into my 79 Z28 and try some stock suspension, radial racing. Probably won't be top qualifier but can have fun and learn a thing or two in the process. maybe St. pete will stay an all run field.

[Suicidal Racing]

i think most them big inche turbo engines are 5" or 4.9" bore spacing engines with little cranks

[Eric@VictoryRacing]

Val, I agree with you 100% about the LSx block.

Used 6.0L Block $200.00
Callies Billet Steel LS1 Main Caps $539.99
ARP Main Studs $189.99

You're looking at roughly $930.00 before any machining. If you can't happen to find a 6.0L used GM wants around $800 for one, and that puts you way too close to the price of a LSx.


with billet caps, line hone, price of block, etc. you are upwards near the price of a lsx block, and that block is the ticket "hands down"

[qwiknotch]

From what I hear. unless you dry sump or use an external wet sump, the LSX block has oiling problems above 7600rpm.
I plan on setting my car up to run below that rpm, and use more stroke in the engine.

[chevytoo]

I have decided that if I had to ask the question I should be going with the lsx. Just have to wait till feb now. lol

[JL ws-6]

my ls2 402 has made 480 rw n/a and with a 150 shot has had zero problems so far, I am not gonna worry about the block itself when a 2nd stage eventually gets added.

You can take these blocks into the nigh 8 second range when properly built without any problems.... you'll lift the heads off before you have a block failure.

[Fryguy302]

The Stenod guys went 8.2x @ 3200# with a stock LS1 aluminum block and twin turbos. The LS2 block is supposed to be stronger than that. The LS3/L92 stronger yet.

[greatwhitess]

When you get to that power level you are going to have plenty of other problems besides the block. Keeping the heads down seems to be a big problem past 900RWHP or so. The thicker deck aftermarket heads help some. Anything north of 8000 rpms you better look at dry sumping it. They have crappy oiling systems. We are looking at putting restrictors and restricting PRs in ours to help a little on the SR motor.

If I am not mistaken they are having a bunch of casting problems with the LSX blocks. There is the aluminum Warhawk block that would handle the power you are talking about with ease but you pay for it.

[njc.corp]

Their are some nice sleeve ls2 going around making big power and also punching out low to mid 8.00-8.50 et's

Maybe thats a option-

i know red do it and also erl

http://www.raceenginedevelopment.com/pages/694927/index.htm

http://www.inteli-com.com/erl/high_performance_engine_services.asp

from memory i think erl had a interview @ the pri show on power tv-saying their ls2 program has put over 150 hard runs without any issues-

maybe thats the go if the lsx block are having issues--

Nick--

[Steve Turley]

The red camaro in my sig. is the car with the erl ls2 with 150+ runs with no issues. Last year it was a conventional 4 bolt per cylinder head,this year they added 2 more head bolts(like lsx) and I have new allpro 6 bolt heads, looking to go 7.50 or faster.

[njc.corp]

i thought so--

steve if u dont mind what they charging for the ls2 block all done-u can pm me if u dont want to put the price on the net-

nick--

[Steve Turley]

To be honest I dont know, i'm not sure if its even aval. to the public yet. I will find out and let you know.

[njc.corp]

To be honest I dont know, i'm not sure if its even aval. to the public yet. I will find out and let you know.

Thanks steve-

Nick--

[Billyman]

I have yet to see a block actually have a hard fialure. I have seen the cam bearings spin though with big power. Usually they spin due to block flex and distortion. I have also seen the center main bearing due the same thing.

Ditto.

An LS1 and LS2 aluminum block can be good up to around 1500 HP with the use of a good main girdle. The girdles help reduce the block flex and typically resolves the cam bearing/center main bearing problem.

A high nitrous or boosted LS aluminum block really needs to be filled and it will take the handling capacity to new heights.

The car in the link below dyno's at over 1100 RWHP on an aluminum LS7 block (not the C5R). Main girdle and block fill let's it live with no problems. :)

http://www.yellowbullet.com/forum/showthread.php?t=46202

[Steve Turley]

The Blocks are avalialble, i'm waiting on pricing.

[1BADAIR]

many are pinning the main caps over 800hp or so.

[Mr.Martystone]

I don't really think a girdle does shit on the ls1 cars unless it is the W2W piece. The DM Engineering or whatever it is called, is kind of a waste of money versus pinning the caps.

[thechad]

Around 800 most ls blocks and I've even seen the LSX's eerrr 2500 HP block crack bulk heads at 1700. I'm machining one out of a solid chunk 4140 right know at work. for about 10 G's I can hook you up. ;)

[Billyman]

Around 800 most ls blocks....

Jeesh, that's stock bottom end HP around our shop and we've only thrown rods. :)

[Nutcase]

Bringing this one back from the dead...We pulled apart my LS2 motor (stock stroke) and it showed no evidence of block flex or problems after 40 runs (made 1213 RWHP)

other than a little dirt (due to the motor sitting assembled w/o a pan for a few years) it showed no bearing wear. thrust surfaces looked new and all the mains looked good.

only problem was main cap walk since the main's weren't pinned.

[qwiknotch]

nitrous engines are little more abusive and shock the engine more. I think with a main girdle or pinned caps or both and motor plates over motor mounts, it will provide enough security to not have the engine flex. Mine will have a main girdle and now motor plates, in the hopes of not having the block move when I dump the clutch at 7000

[back n black]

Jeesh, that's stock bottom end HP around our shop and we've only thrown rods. :)

lol.. I was thinking the same thing.