Patriot heads. NEED HELP!
03-20-2007, 05:34 PM
#1
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Patriot heads. NEED HELP! Im going with the LG5X3 cam on 112 LSA and a set of Patroit ls6 "style" ported heads with stock 2.00intake/1.55exhaust valves for piston to valve clearance.
I need advice on what cc's to go with and what size head gasket. The car is not a daily driver, but 99% of driving is on the street. I want proper/safe compression, while gaining the benifit of power in compression.
LG said: 59cc with .040 gasket for 11:1 compression. (although I was told that would make 11 1/2:1 compression, which is bad?)
Patriot said: 64cc milled to 62cc with .041 gasket for 10.8:1 compression.
Input? What cc's and what size head gasket?
Thanks.
I need advice on what cc's to go with and what size head gasket. The car is not a daily driver, but 99% of driving is on the street. I want proper/safe compression, while gaining the benifit of power in compression.
LG said: 59cc with .040 gasket for 11:1 compression. (although I was told that would make 11 1/2:1 compression, which is bad?)
Patriot said: 64cc milled to 62cc with .041 gasket for 10.8:1 compression.
Input? What cc's and what size head gasket?
Thanks.
Last edited by BatmobileWS6; 03-21-2007 at 05:02 PM.
03-20-2007, 08:46 PM
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if you're trying to save piston to valve clearance, milling is not the way to go. i don't know the specs on your cam, but the 59cc head with stock head gaskets will get you very close to stock Piston-Valve clearance.
03-20-2007, 09:55 PM
#4
They don't publish the spec's, but they are floating around here. It is a little bigger than what was posted above, which is why LG recommends more compression. Since they weld the combustion chambers, you should be ok with valve clearance on a stock size gasket, but you'd get better quench with a .040 or .045 gasket and a slightly larger chamber.
I would mock it all up and measure the clearance with a .040 gasket to see how much you lose with .013 -.016 less gasket. You shouldn't have to flycut much at this duration (unless the heads are milled).
With the numbers I've seen posted, 61cc and a .040 gasket comes out to 11.51 SCR, 8.79 DCR, which is right where you want to be. If you have to remove anything at all, even 1 more cc keeps you at 8.68 DCR.
I would mock it all up and measure the clearance with a .040 gasket to see how much you lose with .013 -.016 less gasket. You shouldn't have to flycut much at this duration (unless the heads are milled).
With the numbers I've seen posted, 61cc and a .040 gasket comes out to 11.51 SCR, 8.79 DCR, which is right where you want to be. If you have to remove anything at all, even 1 more cc keeps you at 8.68 DCR.
03-21-2007, 04:28 PM
#7
Originally Posted by BatmobileWS6
So you would say get patriot to do a 61cc and use a .040 gasket?
What is the stock size cc and stock size gasket?
What is the stock size cc and stock size gasket?
A stock LS1 is 67cc and depending on what year gasket, they will be .041"-.052".
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03-21-2007, 04:58 PM
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Hey Gunnar...what would a price be on a 243 casting CNC ported?
And do you recommend going with the 64cc milled to 62cc with a .041 gasket for 10.8:1 compression?
Is that extra? How much would my total be?
And do you recommend going with the 64cc milled to 62cc with a .041 gasket for 10.8:1 compression?
Is that extra? How much would my total be?
03-21-2007, 08:46 PM
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Originally Posted by BatmobileWS6
Well LG doesn't exactly give the specs but I've heard its something like 232/240 .600/.610
How does that correlate with compression?
How does that correlate with compression?
milling doesn't cost anything extra from Patriot
03-21-2007, 09:46 PM
#10
Originally Posted by 2000TransAmWS6
i was thinking more about piston to valve clearance
milling doesn't cost anything extra from Patriot
milling doesn't cost anything extra from Patriot
Post # 23 of the G5x3 vs. MS3 thread
Originally Posted by Louis
Hi guys, there is 220 thou of valve drop with a milled, 59cc AFR and .040 cometics. There is 200 thou of valve drop on a stock motor.
Any X series( G5, X1, X2, X3, X4, 111/112/114 excluding the xX ( which in most cases, thats install only here at the shop) will fit on a stock engine, 112 or 114. The X3 110 will not clear stock heads, but it will be close on the AFRs. You gain quite a bit of PTV with AFRs. If you are not sure, and want to know what your setup came in at, check it.
Any X series( G5, X1, X2, X3, X4, 111/112/114 excluding the xX ( which in most cases, thats install only here at the shop) will fit on a stock engine, 112 or 114. The X3 110 will not clear stock heads, but it will be close on the AFRs. You gain quite a bit of PTV with AFRs. If you are not sure, and want to know what your setup came in at, check it.
