LQ4 vs LQ9
some LQ4's come with electric throttle too, 03 suburban has electronic throttle, probably more.
dont know of the external differences between the two
dont the LQ9's have flat-top pistons to boost compression?
dont know of the external differences between the two
dont the LQ9's have flat-top pistons to boost compression?
lq9 has flat top pistons and a beefier rod.
lq4 03+ all have electronic throttle.
i wouldnt care which i had, both are going to make the same amount of power.
same head, same cam.
i doubt the .6 bump in compression is worth what GM "advertises"
good luck.
lq4 will be MUCH cheaper.
most online auctions and junkyards want more for them used than a brand new longblock costs new.
it came from an SS or a caddy... so it cost a fortune, LOL.
lq4 03+ all have electronic throttle.
i wouldnt care which i had, both are going to make the same amount of power.
same head, same cam.
i doubt the .6 bump in compression is worth what GM "advertises"
good luck.
lq4 will be MUCH cheaper.
most online auctions and junkyards want more for them used than a brand new longblock costs new.
it came from an SS or a caddy... so it cost a fortune, LOL.
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The earlier LQ4s (I think '99 model year, not sure about '00) had iron heads. But the later LQ4's ('01 and newer) use the same alum heads as the LQ9 (or maybe that's the other way around). And the LQ4/LQ9 alum head is basically an LS6 head with a bigger chamber (72cc vs 65cc or so) so they flow pretty well.
'Dreamin'
'Dreamin'
iron headed 6.0's are based on 98 ls1 castings.... so stay away from them if maximum HP is your goal.
ive heard that 99-02 were mixed iron/aluminum.
all 03+ are aluminum.
check for the "317" casting # on the corner of the head.
ive heard that 99-02 were mixed iron/aluminum.
all 03+ are aluminum.
check for the "317" casting # on the corner of the head.
