My new engine showed uo today and it seems to be alittle diffrent then the one i have intake and throttle body are diffrent, Did the LQ9 come with a cast iron block?

 

Any pics? What were you trying to order? What year do you have to compare it to? Yes the Lq9 is iron

 

Ill get some pics here shortly. Mine came out of a 2000 2001 HD,Come to find out this one came off a 2005 2006 caddilac SUV its drive by wire diffrent fly wheel. Factory specs were something like 345 HP 380 LB TQ. Got a steal on this motor guy didnt know what he had it came fully dressed so just have to change cam springs injectors. Im worried the tune will be off since this motor supposbly has higher compression and what not. Will i need to retune if this turns out to be a higher compression 6.0????

 

 

 

It also came with the newer round coil packs mine were square not to sure it makes much diffrence but newer anyway.

 

It is the higher compression 6.0. A re-tune might be a good idea

 

Yeah I would do a retune

 

Hopefully should see alittle more Umphhh then. Wasnt to plzd with my old 6.0. I might wanna go alittle bigger on the cam though tr228 is what im looking at now should be solid in this new engine. Thanks for the help Gents

 

I think your cam you were running on the LQ4 may have been part of the reason you weren't too happy with it. That cam would be a decent all around cam for a 5.3, for a 6.0 it should have had plenty of grunt down low, but probably fell off a bit up top. I think you'll like a TR/TSP 224 or 228 a lot better. Best bet would be to get Pat G. to spec and grind you one.