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Differences between LS2 and LQ9??

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Old 02-02-2007, 09:02 AM
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Default Differences between LS2 and LQ9??
Other than iron block, 317 heads, truck intake and sensors whats the difference between a 345 Hp LQ9 and a 400 Hp LS2? Where does the extra 55 Hp come from?
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Old 02-02-2007, 10:19 AM
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The cam, the heads, the intake, compression....The LQ9 is an iron block vs the LS2 is aluminum. The LQ9 is essentially just an LS1 minus aluminum with a little bigger bore. All sensors and accessories bolt right on. On the LS2, some of the sensors are different, the fuel rails are different I think, maybe a few other things.
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Old 02-02-2007, 10:19 AM
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rods a beefier and have floating wrist pins i believe. also the LQ9 have flat top pistons. i think the LS2 are dished if i remember right. i have never worked on an LS2 though. cams a slightly different also.
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Old 02-02-2007, 11:26 AM
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a ls2 and a LQ9 with 243 heads on it are roughly the same motors. 11.1 vs 10.9 cr

of course all wiring and etc
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Old 02-02-2007, 12:17 PM
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The LS2 has higher compression (11.0 vs. 10.0), much bigger cam, higher flowing 90mm intake and TB plus much higher flowing exhaust manifolds.
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