LQ4 block?
I would suggest that you do a search on this question. I am pretty sure that the LY6 engine offered for 2007 is essentially an 6.0 L Iron Block with the new heads and truck intake. These heads and the L76 intake would work for a car. However, don't take my word for it, do a search.
Steve
Steve
The LQ4 and the LQ9 both are 6.0 L cast iron blocks and have the 317 casting heads. These 317 heads are basically the same as 243 casting LS6 heads except the combustion chambers are set up for 72 cc. The pistons and rods are different as the LQ4 has 9.4:1 CR and the LQ9 has a 10.0:1 Static CR. The LQ9 was used in the Denali, Silverado SS and the Escalade. The LQ4 was used in everything else. Both have cranks with a 3.622" stroke, but the counterweights are set up to match the rotating/reciprocating mass of the piston/rod assemblies of the respective engine. Except for the rotating assemblies, they are the same engine. All other parts are interchangeable. They both have the same basic cast iron crank.
Hope this helps.
Steve
Hope this helps.
Steve
The L92 heads will work with any LS block with a 4 inch or larger bore. The L76 car engine is a 6.0 short with L92 heads. Some of the 07 SUV / Trucks are going to have this engine also.
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Originally Posted by bg-sdpc
The L92 heads will work with any LS block with a 4 inch or larger bore. The L76 car engine is a 6.0 short with L92 heads. Some of the 07 SUV / Trucks are going to have this engine also.
The bore of an LQ4 is 4.000 and the l92 is 4.065, so that should not matter?
Please advise
Thanks
Originally Posted by Jamesbond2509
The bore of an LQ4 is 4.000 and the l92 is 4.065, so that should not matter?
Please advise
Thanks
Please advise
Thanks
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From: Ontario
Originally Posted by bg-sdpc
No, because the L76 (which has L92 heads) is a 4.00 bore from the factory.
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Originally Posted by Steve Bryant
Both have cranks with a 3.622" stroke, but the counterweights are set up to match the rotating/reciprocating mass of the piston/rod assemblies of the respective engine. Except for the rotating assemblies, they are the same engine.
Originally Posted by s346k
so...does this mean that the lq4 would be more prone to engine failure (bottom end) vs an lq9? is the lq9 more apt to take high rpms? i am asking because i am going to cam the hell out of an iron 6.0 with plans of shifting ~7k, and if an lq4 isn't up to the task, i won't use that shortblock.
Nate
Originally Posted by Jamesbond2509
Excellent! - also will this bolt onto my existing setup without changing pushrods and cam. Currently the pushrods are stock.
Originally Posted by Nate_Taufer
No he's saying that the two shortblocks are balanced for their respective bottom ends. Put some rodbolts in and spin the hell outta the block.
Nate
Nate
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From: Ontario
Originally Posted by bg-sdpc
Just checked the GM catalog and the L92 uses the same length pushrods as the LS1. Therefore, you will be good to go with the cam and pushrods that you have.
This must be my lucky day, now if only the heads are 72cc's! It would be perfect for FI
only change between both LQ9 and LQ4 iron block is the pistons in the engine. Everything else is basically identical and interchangeable. . One if like a dish piston (LQ4 9.4:1) with low compression while the higher compression motor (LQ9 10:1) will have a flat top style pisotn like a normal 5.7 LS1, that is all no need to complicate things lol we already have enough on our minds to handle with the ls1, ls2, ls3, ls4, ls6, ls7 stuff. This stuff can get confusing at times. Hope everything goes good with whatever you build !! 
