LQ9 head gaskets?
Thread Starter
Teching In
Joined: Sep 2012
Posts: 9
Likes: 0
From: Chicago
LQ9 head gaskets? Looking for advice on head gaskets. I have an 2003 lq9 with tick performance stage 2v2 cam and all the obvious upgrades to work with a larger cam, once tuned and ready to run it should be around 500 to 550 horsepower.I'm going to run it on motor for a year or so and then boost it, just looking for advice on a head gasket that might work well for both setups or the head gasket that will work well for all motor. Thanks!
Thread Starter
Teching In
Joined: Sep 2012
Posts: 9
Likes: 0
From: Chicago
317 have a 71cc combustion chamber. You would end up with a 9.91:1 compression ratio with LS9 gaskets.
4.00 Bore
3.62 Stroke
71cc Head combustion chamber
0 Dome or dish... LQ9 has flat top piston
.051 Head gasket thickness on LS9's
4.10 Head gasket bore on LS9's
.008 deck hight.
http://www.wallaceracing.com/cr_test2.php
So you can run the LS9 gaskets on your motor with out dropping the compression much at all. Stock LQ9 compression is 10:1. If you don't think forced induction will happen I would go with a .040 cometic and bump the compression up a bit.
4.00 Bore
3.62 Stroke
71cc Head combustion chamber
0 Dome or dish... LQ9 has flat top piston
.051 Head gasket thickness on LS9's
4.10 Head gasket bore on LS9's
.008 deck hight.
http://www.wallaceracing.com/cr_test2.php
So you can run the LS9 gaskets on your motor with out dropping the compression much at all. Stock LQ9 compression is 10:1. If you don't think forced induction will happen I would go with a .040 cometic and bump the compression up a bit.
Thread Starter
Teching In
Joined: Sep 2012
Posts: 9
Likes: 0
From: Chicago
317 have a 71cc combustion chamber. You would end up with a 9.91:1 compression ratio with LS9 gaskets.
4.00 Bore
3.62 Stroke
71cc Head combustion chamber
0 Dome or dish... LQ9 has flat top piston
.051 Head gasket thickness on LS9's
4.10 Head gasket bore on LS9's
.008 deck hight.
http://www.wallaceracing.com/cr_test2.php
So you can run the LS9 gaskets on your motor with out dropping the compression much at all. Stock LQ9 compression is 10:1. If you don't think forced induction will happen I would go with a .040 cometic and bump the compression up a bit.
4.00 Bore
3.62 Stroke
71cc Head combustion chamber
0 Dome or dish... LQ9 has flat top piston
.051 Head gasket thickness on LS9's
4.10 Head gasket bore on LS9's
.008 deck hight.
http://www.wallaceracing.com/cr_test2.php
So you can run the LS9 gaskets on your motor with out dropping the compression much at all. Stock LQ9 compression is 10:1. If you don't think forced induction will happen I would go with a .040 cometic and bump the compression up a bit.
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Looking for advice on head gaskets. I have an 2003 lq9 with tick performance stage 2v2 cam and all the obvious upgrades to work with a larger cam, once tuned and ready to run it should be around 500 to 550 horsepower.I'm going to run it on motor for a year or so and then boost it, just looking for advice on a head gasket that might work well for both setups or the head gasket that will work well for all motor. Thanks!
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