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Engine block strength....

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Old Mar 6, 2010 | 04:32 PM
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Default Engine block strength....
Anyone know-FOR SURE-if there is any difference in strength between the L92 block and the LS3 block? I think I read somewhere that when the ZR1 C6 came out, the LS9 engine was built around an LS3 block because, with the exception of the C5R block, it is the strongest aluminum block G.M. makes, including the LS7 block. The strength comparison to the LS7 appears to make sense, because it would seem that G.M. could get the same 600H.P.+ output from the LS7 with its 427 cubes with far less boost. Thanks.
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Old Mar 8, 2010 | 07:17 AM
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best to speak to someone like VA speed. These guiys have pushed over 1500bhp out of GM cast LS2 blocks.....

Chris.
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Old Mar 11, 2010 | 04:38 PM
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What type of hp are you looking to make
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Old Mar 12, 2010 | 12:12 AM
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LS-Series Blocks Ratings by GM

LS1/LS6 Alum 3.890" " RATED @ 450 HP
LS2 Alum 4.000" RATED @ 450 HP
L92/LS3 Alum 4.065" RATED @ 525 HP
LS7 Alum 4.125" RATED @ 550 HP
LS9 Alum 4.065" RATED @ 635 HP
C5R Alum 4.117" RATED @ 900 HP

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Old Mar 12, 2010 | 12:32 AM
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Originally Posted by WS6-R
LS-Series Blocks Ratings by GM

LS1/LS6 Alum 3.890" " RATED @ 450 HP
LS2 Alum 4.000" RATED @ 450 HP
L92/LS3 Alum 4.065" RATED @ 525 HP
LS7 Alum 4.125" RATED @ 550 HP
LS9 Alum 4.065" RATED @ 635 HP
C5R Alum 4.117" RATED @ 900 HP

if those ratings were true there would be a lot of blown up cars around here. Funny how conservative gm is with those ratings...
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Old Mar 12, 2010 | 12:20 PM
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Originally Posted by got-a-ls1
if those ratings were true there would be a lot of blown up cars around here. Funny how conservative gm is with those ratings...

lol i agree
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Old Mar 12, 2010 | 01:51 PM
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As I understand it GM didn't SC the LS7 because the liners are too thin to reliably hold boost. I have heard of a few cases of cracked LS7 liners but never seen one.
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Old Mar 12, 2010 | 03:10 PM
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Originally Posted by WS6-R
LS-Series Blocks Ratings by GM

LS1/LS6 Alum 3.890" " RATED @ OVER 450 HP
LS2 Alum 4.000" RATED @ OVER 450 HP
L92/LS3 Alum 4.065" RATED @ OVER 525 HP
LS7 Alum 4.125" RATED @ OVER 550 HP
LS9 Alum 4.065" RATED @ OVER 635 HP
C5R Alum 4.117" RATED @ OVER 900 HP

Well, actually they say TESTED AT OVER...
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Old Mar 12, 2010 | 03:31 PM
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I think you will have different real-world fail points
depending on whether you make your HP by torque
/ cylinder pressure (boost, stroke, CR) or by RPM.
Lifting heads vs breaking rods, etc.
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