Mill heads .010" or just run cometic .045"?
05-20-2013, 12:15 AM
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Mill heads .010" or just run cometic .045"? I race in a power/weight limited class so I can't get crazy with the heads or a bigger cam. That said, torque is unlimited so a slight bump in compression can boost torque w/o adding much power. I was going to have the heads milled .010, but instead of spending the money, why not just run .045" Cometic head gaskets?
My research shows the MLS '02-'04 head gaskets I have are .060" compressed so running the .045" cometics would be equivalent to milling around 15 thousands.
Thoughts?
EDIT - It seems they're around $180 a pair which is close to the same cost as getting the heads milled.
My research shows the MLS '02-'04 head gaskets I have are .060" compressed so running the .045" cometics would be equivalent to milling around 15 thousands.
Thoughts?
EDIT - It seems they're around $180 a pair which is close to the same cost as getting the heads milled.
05-20-2013, 12:41 AM
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I'll have to pull timing to flat line the new engine at around 350-355 rwhp so not sure I can take advantage of that. I'm putting my LS6 heads on a new LS1 crate engine so this is one of those "might as well while I'm in there" things.
Last edited by Cobra4B; 05-20-2013 at 12:51 AM.
05-20-2013, 01:38 AM
#4
Peak HP and Peak TQ are usually a little different in timing. You could look into a truck style intake. Should eat a little top end and give more tq.
Are you able to change the cam? You may be able to run a cam that has just tq in mind. A 350 limit should make it easier to get a great tq curve.
You could also mill and do the .045" gasket. So long as it stays withing the reason of the fuel you're using.
Are you able to change the cam? You may be able to run a cam that has just tq in mind. A 350 limit should make it easier to get a great tq curve.
You could also mill and do the .045" gasket. So long as it stays withing the reason of the fuel you're using.
05-20-2013, 09:23 AM
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I got a used '01 LS6 cam to go in it. I lost two lifters in my 123k original LS6. The 2001 heads have longer valve stems to account for the '01 cam's smaller base circle so I didn't want to mess with it.
Probably just going to mill the heads .010" and use the OEM gaskets I already have and call it a day. Need to have the heads checked over due to the mileage anyway.
I want to keep the car able to run on 93 octane as the price jump to 100 is substantial.
Probably just going to mill the heads .010" and use the OEM gaskets I already have and call it a day. Need to have the heads checked over due to the mileage anyway.
I want to keep the car able to run on 93 octane as the price jump to 100 is substantial.
