408 iron or aluminum?
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Teching In
Joined: Apr 2005
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From: Houston
408 iron or aluminum? i know you can get the LS block in either aluminum or iron...i like the idea of the aluminum being all in all about 600 lbs but im wanting to run a TT kit pushing 15-20 psi making right around 1,000-1200 hp...its pretty much a must that i use an iron block with all the heat and everything right? i just wanted to make sure..i know that aluminum would expand very easily and possibly warp
thx for any advice
thx for any advice
For structural integrity, strength, longevity, and peace of mind I would recommend the iron block, especially at those power levels. It has been done on the Alum but I'm not going to risk my investment knowing that the alum blocks are 50% weaker than the iron.
On The Tree
Joined: Mar 2004
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From: Cleveland
An engine builder who is well regarded here told me he generally sees higher power levels with the iron block. The cylinder walls are more rigid, not to mention the increased stability on the bottom end. All in all, a worthwhile tradeoff for the ~80 Lb weight penalty.
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Teching In
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From: Houston
also has anyone ever done TTs above the engine? top mounted on an lsx motor? i know of the plastic intake and a couple other things possibly damagable but i fig someone has gone around that stuff...whats the main reason? could it work in a different car? say a thirdgen
Originally Posted by GodSpeedGTA
also has anyone ever done TTs above the engine? top mounted on an lsx motor? i know of the plastic intake and a couple other things possibly damagable but i fig someone has gone around that stuff...whats the main reason? could it work in a different car? say a thirdgen
I was planning to go with a 370 iron block until i saw what W2W did with their LS2 block. They are running 28lbs of boost and trapping 16x mph with an LS2 aluminum block. Hell my setup will never see that much boost (16-18lbs max plus 50-100 shot) so im going with a LS2 block instead of a LQ9 block. At least its 80lbs lighter.
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Thread Starter
Teching In
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From: Houston
im talkin about two turbos sitting above the valve covers...can it be done...like i said this will be on a thirdgen so it wont be the same engine bay...i think we have a bit more room than the 4th gens and the lsx motors dont tuck as much
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Yes a resleaved aluminum block is very strong, but the penalty is cost and the fact that many people have had trouble with resleaved blocks when they aren't done properly. For what you would spend on a resleaved LS2 block you might as well buy the Dart block and be really strong.
I would (and did) go iron. The block is cheap to buy and its a proven performer.
I would (and did) go iron. The block is cheap to buy and its a proven performer.
Originally Posted by TS6
....For what you would spend on a resleaved LS2 block you might as well buy the Dart block and be really strong....
May wanna check those prices again...
Originally Posted by GodSpeedGTA
im talkin about two turbos sitting above the valve covers...can it be done...like i said this will be on a thirdgen so it wont be the same engine bay...i think we have a bit more room than the 4th gens and the lsx motors dont tuck as much
You don't have to resleeve a ls2 block, it comes stock with a 4.00 bore and with a 4.00 crank will give you 402cuin. or 370 with a stock crank. Mike Browns alum. 370 is making 1200+crank hp for over a 1 1/2 years with absolutley no issues and he runs the car at the track alot!!
Yeah, that's the kit I was talking about. BBS sells/did sell that kit on ebay. First off those SBC manifolds will not bolt up to an lsx block. Also that placement would put them right where the wheel well/shock tower is.
