SS TITANIC Posted October 19, 2005 Report Share Posted October 19, 2005 Does anybody know all the differences between the LQ9 & LS2? CAM, HEADS, TUNING, ETC. Link to comment Share on other sites More sharing options...
CoolBlueSS Posted October 19, 2005 Report Share Posted October 19, 2005 Mainly cam, heads, and intake. LS2 use aluminum heads, I believe. Don't know the spec on the cams, but they have different part numbers. Link to comment Share on other sites More sharing options...
SS TITANIC Posted October 19, 2005 Author Report Share Posted October 19, 2005 Mainly cam, heads, and intake. LS2 use aluminum heads, I believe. Don't know the spec on the cams, but they have different part numbers. <{POST_SNAPBACK}> SAME size chambers, valves? Link to comment Share on other sites More sharing options...
CoolBlueSS Posted October 19, 2005 Report Share Posted October 19, 2005 Don't know? All I have is part numbers. Lol! I'm sure someone on here has all the particulars. Valves are probably the same size, but the pistons are different. Link to comment Share on other sites More sharing options...
CoolBlueSS Posted October 19, 2005 Report Share Posted October 19, 2005 If you're thinking of a cam/head swap from an LS2, I've read on here that there may be better choices in the aftermarket. Link to comment Share on other sites More sharing options...
Krambo Posted October 19, 2005 Report Share Posted October 19, 2005 ...saw you posted the same question on PerformanceTrucks.net as well ;) Between the two boards, you will get the answers you are looking for. Link to comment Share on other sites More sharing options...
BenKey Posted October 19, 2005 Report Share Posted October 19, 2005 LQ9 has aluminum heads also. Link to comment Share on other sites More sharing options...
Kyle's03SilveradoSS Posted October 20, 2005 Report Share Posted October 20, 2005 Out of curiousity what is LQ9 and LS2 short for? If anything at all. Link to comment Share on other sites More sharing options...
CoolBlueSS Posted October 20, 2005 Report Share Posted October 20, 2005 Out of curiousity what is LQ9 and LS2 short for? If anything at all. <{POST_SNAPBACK}> GM RPO (regular production option) codes for engine. LQ9=6.0 HO 345HPLS2=6.0 400HP Link to comment Share on other sites More sharing options...
CoolBlueSS Posted October 20, 2005 Report Share Posted October 20, 2005 LQ9 has aluminum heads also. <{POST_SNAPBACK}> I did not know that. I've had my hood up several times, but have not even taken the side covers off. It just came out of warranty so I'll have to work on it myself now. Link to comment Share on other sites More sharing options...
detjoe Posted October 20, 2005 Report Share Posted October 20, 2005 LQ9 has aluminum heads also. <{POST_SNAPBACK}> I did not know that. I've had my hood up several times, but have not even taken the side covers off. It just came out of warranty so I'll have to work on it myself now. <{POST_SNAPBACK}> wow you learn something new every day, thanks. I remember my 96ss did not have alum heads... Link to comment Share on other sites More sharing options...
edessa Posted October 20, 2005 Report Share Posted October 20, 2005 Correct me if I'm wrong but I think the LQ9 has a steel block and the LS2 is an all aluminum engine. Link to comment Share on other sites More sharing options...
Brandon27 Posted October 20, 2005 Report Share Posted October 20, 2005 I have always thought it was weird that gm put the lt1 in the imp ss's and used the iron heads, while the f-bodis and vettes got the aluminum heads. Brandon Link to comment Share on other sites More sharing options...
CoolBlueSS Posted October 20, 2005 Report Share Posted October 20, 2005 Correct me if I'm wrong but I think the LQ9 has a steel block and the LS2 is an all aluminum engine. <{POST_SNAPBACK}> I believe that is correct. Link to comment Share on other sites More sharing options...
misterp Posted October 20, 2005 Report Share Posted October 20, 2005 I have always thought it was weird that gm put the lt1 in the imp ss's and used the iron heads, while the f-bodis and vettes got the aluminum heads. Brandon The cops and taxi drivers wanted it that way, at the time those customers believed long-term head gasket life between dissimilar metals was a serious problem, so GM continued to use iron block & heads until the remaining head gasket issues were later proven to be overcome. There were other factors as well, but by and large these customers were more than happy to sacrifice some weight and potential hp for durability. Mr. P. Link to comment Share on other sites More sharing options...
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