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Old Apr 23, 2008 | 08:52 PM
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anyone have any idea how much hp/ i will get by adding ls6 heads milled down to 59cc 1.8 rockers and ls6 intake to a 2000 auto coupe. dont want to do a cam yet but maybee in the future thanks

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Old Apr 23, 2008 | 08:55 PM
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you would get about 40 rwhp adding those items

heads - 20 rwhp
intake mani - 10 rwhp
1.8 rockers 10 rwhp
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Old Apr 23, 2008 | 10:10 PM
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anyone else
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Old Apr 23, 2008 | 10:15 PM
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40 is a very high estimate.

Be very happy with 30
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Old Apr 23, 2008 | 11:24 PM
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i am hoping for more then that they are ls6 243 heads milled to 59cc that will bring compresion up to 11.5
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Old Apr 24, 2008 | 12:25 AM
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If you go to the work of changing the heads, do the cam at the same time. It's a little more work and about an additional $400 for the cam of your choice, a few gaskets, and a new balancer bolt. Either that or wait on the heads and do them both at once.

I hate to see you have to go down that road twice, unless you just enjoy it...

Also, be cautions with 1.8 rockers and milled heads....you might consider staying with 1.7's and just get the cam with the specs you want. (Be sure that your springs will handle it and you have enough PTV clearance)
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Old Apr 24, 2008 | 01:06 AM
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Originally Posted by ISeeRed
If you go to the work of changing the heads, do the cam at the same time. It's a little more work and about an additional $400 for the cam of your choice, a few gaskets, and a new balancer bolt. Either that or wait on the heads and do them both at once.

I hate to see you have to go down that road twice, unless you just enjoy it...

Also, be cautions with 1.8 rockers and milled heads....you might consider staying with 1.7's and just get the cam with the specs you want. (Be sure that your springs will handle it and you have enough PTV clearance)

Oh yea I didnt think about the clearance issue with the 1.8 rockers and milled heads
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Old Apr 24, 2008 | 07:36 PM
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the 1.8rr will bring my stock cam at 500 to about 528 you think that would have clearence issues with the 59cc head??
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Old Apr 24, 2008 | 08:25 PM
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No, I honestly don't think you'd have an issue with that low of a lift, but I'd save the money on rockers, and put it into a cam that gives you what you're looking for, since you're going to be in there. If you buy a cam later, you'll probably want to go back to 1.7's.

My 2 cents. You obviously have to spend your money according to your desires, but I think you'll be happier if you do it all at once.
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