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HP with a LQ4&9

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Old 12-22-2008, 10:59 AM
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Default HP with a LQ4&9
can anyone tell me the hp on a stock lq4&lq9
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Old 12-22-2008, 11:02 AM
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Google....
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Old 12-22-2008, 11:14 AM
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lq9 345 hp
lq4 300-335 only difference being the tune.
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Old 12-22-2008, 11:34 AM
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Originally Posted by colyneedsv8
lq9 345 hp
lq4 300-335 only difference being the tune.
LQ9 has higher compression doesnt it? I thought the pistons had a different top.
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Old 12-22-2008, 11:35 AM
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Originally Posted by 00ChevyScott
LQ9 has higher compression doesnt it? I thought the pistons had a different top.
yes. i meant the only difference between the ratings on the different LQ4's is the tune.
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Old 12-22-2008, 11:38 AM
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Originally Posted by colyneedsv8
yes. i meant the only difference between the ratings on the different LQ4's is the tune.
duh

i missread your post
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Old 12-22-2008, 01:10 PM
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Originally Posted by 00ChevyScott
LQ9 has higher compression doesnt it? I thought the pistons had a different top.

LQ9 = 10:1 compression, flat top pistons
LQ4 = 9:1 compression, dished pistons
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Old 12-22-2008, 01:17 PM
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No the LQ9 is 10.08:1 and the LQ4 is 9.4:1

The LQ4's rated at 300 were at lower rpm's I believe whereas the LQ9 is rated at 5200 where the stock cam makes peak HP. LQ4 is 335 and LQ9 is 345, negligible difference.
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Old 12-22-2008, 01:44 PM
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didn't know that the LQ4 was 9.4:1......excuse me for being .08 off on the LQ9
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Old 12-22-2008, 03:16 PM
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Originally Posted by Fireman31
didn't know that the LQ4 was 9.4:1......excuse me for being .08 off on the LQ9
I dont think he ment any harm by correcting you, rather just trying to clear things up.

After 04 I believe the only difference was the pistons prior the rods were also slightly different. I think all 05 and newer use LS2 Rods. Someone correct me if I am wrong. I am trying to remember.
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