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lq9 vs lq4 differences

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Old Sep 10, 2009 | 03:42 PM
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Default 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
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Old Sep 10, 2009 | 03:51 PM
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they are both 364 s the lq9 has flattop pistons with floating pins, and the lq4 has 7cc dished pistons with pressed pins
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Old Sep 10, 2009 | 03:55 PM
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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
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Old Sep 10, 2009 | 09:05 PM
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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).
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Old Sep 10, 2009 | 09:13 PM
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lq9 have fully floating rods, lq4 have pressed rods
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Old Sep 10, 2009 | 09:17 PM
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Rods depend on the year. The newer ones are all the same.
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Old Sep 10, 2009 | 09:22 PM
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those also have a different engine code too
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Old Sep 10, 2009 | 09:54 PM
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what does the pressed pin versus floating mean as far as longevity or performance?
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Old Sep 10, 2009 | 10:56 PM
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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.
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Old Sep 11, 2009 | 06:59 PM
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I was wondering about this as well. thanks for the info.
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Old Sep 12, 2009 | 10:40 AM
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thanks guys
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