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How much would I gain from 317's?

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Old 03-19-2012, 09:07 AM
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Thanks does any one know which headcbolts I should buy?
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Old 03-19-2012, 10:11 AM
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ARP seems to be the way to go. Studs would be best but their bolts are good as well.
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Old 03-19-2012, 10:52 AM
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Originally Posted by Adam86
Same boost with a compression drop would cause a loss of power.
^ This!

Alot of people don't realize that. It's just physics.
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Old 03-19-2012, 02:05 PM
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I realize any drop in compression is a drop in horsepower but I am hoping for better flow and safety. I can probably go to a smaller pulley with the compression drop without destroying my stock bottom end.
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Old 03-19-2012, 06:51 PM
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Originally Posted by Ws6power1
I realize any drop in compression is a drop in horsepower but I am hoping for better flow and safety. I can probably go to a smaller pulley with the compression drop without destroying my stock bottom end.
Your really safe I have a friend pushing 598rwhp at 12psi with stock bottom ls1 but has a D1 blower, 317, cam and meth on pump gas still can turn it up way more
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Old 03-19-2012, 10:26 PM
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when you buy head bolts or studs your going to want the 98-03 head studs (diffrent lengths) , 04+ are all same size bolts..

head bolts are based on block year, not head year..
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Old 03-20-2012, 01:35 AM
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How about the head gaskets. Since mine is a 98 do I have to have a specific gasket made for a 98 or can I use the 99-02 gaskets?
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Old 03-20-2012, 02:22 AM
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If your using the 317 heads on your 98 block then you need a ls2 head gasket to match to the heads...
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Old 03-20-2012, 02:22 AM
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or a ls9 head gasket would work..
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Old 03-20-2012, 12:43 PM
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Thanks
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Old 03-20-2012, 01:00 PM
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The cosmetic head gaskets im looking at say they can be used in ls1 ls2 or ls6 is that the correct ones?
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Old 03-20-2012, 01:30 PM
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Yes. Just make sure bore size is at least 4.00"

If you want to save a buck, try the GM MLS head gaskets. they're much cheaper then the Cometic's.
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Old 03-20-2012, 01:58 PM
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Thanks
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Old 03-20-2012, 05:54 PM
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Originally Posted by BlwnLs1GTO
Yes. Just make sure bore size is at least 4.00"

If you want to save a buck, try the GM MLS head gaskets. they're much cheaper then the Cometic's.
More reliable as well.
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