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Can I use a LQ4 Engine in my LS1 car?

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Old 10-17-2009, 02:00 PM
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Originally Posted by gnasty1521
LQ9's are the same except for dished pistons I believe. They only came in high end caddilac's and some H2's. They are very rare, and thus, are more expensive. Either way, most people change out the cam anyways so LQ9's are not that much better at all.

Someone please correct me if I am wrong...
You are incorrect about the pistons. LQ4's have dished pistons for 9:1 compression and LQ9's had flat tops for 9.5:1 compression I believe.
Old 10-17-2009, 03:54 PM
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Comp ratio's-
LQ4- 9.41:1
LQ9- 10.08:1
Old 10-17-2009, 04:52 PM
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Iron block 6.0l and 243 heads here and this beast runs hard.
Old 10-17-2009, 07:55 PM
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Originally Posted by Pharcyde50
Iron block 6.0l and 243 heads here and this beast runs hard.
Thats my next engine mod also...P&P 243's.
Im running 317's now,
Old 10-18-2009, 12:15 AM
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OK well my original thought was still correct. LQ9 is not worth looking for over LQ4...



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