.040 head gasket on LS3

[07-SRT]

Originally Posted by zz430camaro

Cool, I ended up getting a 0.045 gasket so I should be right around 11:1 compression wth 0.038 quench height.

Nice..That's what compression I'm at, you will like the extra torque!

[Russell James]

Originally Posted by zz430camaro

0.010 for clean-up, finished chamber is 68 cc

If you are using a .045 hg with that .010 mill, are they able to calc out what the PTV clearance will be?

I'm thinking of doing a similar set up, wondering if there is any advantage of increasing the compression more with the milling, and using a stock head gasket? Like if you used a stock or LS9 hg, and milled .020. Is there there much difference in landing around 11 to 1 that way? Or did you find it's better to mill less and remove the remaining in the head gasket?

[zz430camaro]

Because the cam I am using has lower duration I dont have to worry about the PTV clearance but larger cams you definetely have to worry. If you use cams from Texas Speed, they can help you in this department as the techs had a good sense of how much room you have with their cams. Although people can give you direction no one will truly be able to calculate it. You need to measure upon assembly.

[zz430camaro]

Originally Posted by Russell James

If you are using a .045 hg with that .010 mill, are they able to calc out what the PTV clearance will be?

I'm thinking of doing a similar set up, wondering if there is any advantage of increasing the compression more with the milling, and using a stock head gasket? Like if you used a stock or LS9 hg, and milled .020. Is there there much difference in landing around 11 to 1 that way? Or did you find it's better to mill less and remove the remaining in the head gasket?

I just millled to clean up the deck surface and used a .045 head gasket to get .038 quench distance. It worked out to about 11:1. So you can play around with this stuff if you want.g

Pick your cam first and then figure out how much you can squeeze it if you want. You can always put the cam in and measure your PTV clearance and then figure out how much room you have to play with the milling/gasket thickness instead of guessing.

[rich2342]

Originally Posted by zz430camaro

I just millled to clean up the deck surface and used a .045 head gasket to get .038 quench distance. It worked out to about 11:1. So you can play around with this stuff if you want.g

Pick your cam first and then figure out how much you can squeeze it if you want. You can always put the cam in and measure your PTV clearance and then figure out how much room you have to play with the milling/gasket thickness instead of guessing.

Are you still on here?

What size cam spec and what was the end result of the cam plus added compression?