1evilss

iTrader: (8)

Will this work with the L92 heads and intake?

Steve Bryant

iTrader: (1)

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

1evilss

iTrader: (8)

Whats the difference between the LQ9 and the LQ4?

Steve Bryant

iTrader: (1)

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

bg-sdpc

iTrader: (4)

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.

Jamesbond2509

The bore of an LQ4 is 4.000 and the l92 is 4.065, so that should not matter?

Please advise

Thanks

bg-sdpc

iTrader: (4)

No, because the L76 (which has L92 heads) is a 4.00 bore from the factory.

Jamesbond2509

Excellent! - also will this bolt onto my existing setup without changing pushrods and cam. Currently the pushrods are stock.

s346k

iTrader: (4)

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_Taufer

iTrader: (1)

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

bg-sdpc

iTrader: (4)

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.

s346k

iTrader: (4)

that was the original plan...sweet action. i was under the impression that they were identical engines except for the differences in head design and after reading what he had posted, i got skurred.

Jamesbond2509

This must be my lucky day, now if only the heads are 72cc's! It would be perfect for FI

Nate_Taufer

iTrader: (1)

They're 70cc's, close enough.

Nate

Jamesbond2509

Are they in stock?

silverbandit0996

iTrader: (2)

so if there was an lq4 bare block, and a lq9 bare block. there would be no difference?

bg-sdpc

iTrader: (4)

Correct, they are the same part #.

Brian

fenix999

iTrader: (17)

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 !!

thedreamer

Thanks for the info