lq9 vs lq4 differences

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Sep 10, 2009 | 03:42 PM

dre2013

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From: Akron OH

lq9 vs lq4 differences

i have a friend who swears that lq4= 364ci and lq9= 377ci.

ive done some decent research on these motors, and from what ive seen the only diff is the dished pistons? thanks

Sep 10, 2009 | 03:51 PM

novaflash2002

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From: Billings, Mt

they are both 364 s the lq9 has flattop pistons with floating pins, and the lq4 has 7cc dished pistons with pressed pins

Sep 10, 2009 | 03:55 PM

NemeSS

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From: Houston,TX

Quote:

Originally Posted by dre2013

i have a friend who swears that lq4= 364ci and lq9= 377ci.

ive done some decent research on these motors, and from what ive seen the only diff is the dished pistons? thanks

your friend is wrong, and your research is correct

Sep 10, 2009 | 09:05 PM

67RS/SSx2

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From: Central Oklahoma

What about the rods? I've read on here some say the LQ9 rods are superior to the LQ4 when it comes to higher rpm (6500 - 7000 or more).

Sep 10, 2009 | 09:13 PM

novaflash2002

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lq9 have fully floating rods, lq4 have pressed rods

Sep 10, 2009 | 09:17 PM

Hilton

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Rods depend on the year. The newer ones are all the same.

Sep 10, 2009 | 09:22 PM

novaflash2002

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From: Billings, Mt

those also have a different engine code too

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Sep 10, 2009 | 10:56 PM

novaflash2002

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From: Billings, Mt

they claim a floating pin is safer for higher rpm andhas less friction, but i have had lock come loose on them. plus i have never seen a pressed pin comeout yet unless you press it out.