Got 6.0 and ls3 heads for free!!!

[pl4yboy]

And the general rule of thumb is .007=1cc. So if heads are 70cc, then .030 would net you right under 66cc heads. I would go with .030 and a thinner gasket to get your compression up to 11:1, or .030 or a stock gasket to get 10.7. This is assuming you run the flat top LQ9 pistons and running 91-93 octane.

[pl4yboy]

Again, if you aren't looking for compression quite that high, you can not mill them quite as far.

LQ9 pistons + stock gasket + stock 70cc heads = 10.2
LQ9 pistons + .040 gasket + stock 70cc heads = 10.5 <----------cha ching?
LQ9 pistons + stock gasket + .030 (around 65.8 cc) = 10.67
LQ9 pistons + .040 gasket + .030 (65.8cc) = 11.05
LQ4 pistons + stock gasket + stock 70cc heads = 9.44
LQ4 pistons + .040 gasket + stock 70cc heads = 9.73
LQ4 pistons + stock gasket + .030 (65.8cc) = 9.87
LQ4 pistons + .040 gasket + .030 (65.8cc) = 10.18

It took me quite a while to run all these numbers lol. After I did, I realized that I used 4.030 for gaskets. So these numbers are just a tiny tiny bit off.

[J Industries]

Thanks man I really appreciate all the work.
I can only get 91 octane out here so I was shooting for 10.7 but 10.5 and no milling sounds good.
Would they not be the 4.030 gasket?

[pl4yboy]

MLS replacement, part number #12589227 is 4.020. I guess it depends which ones you get. MLS are also .051 thickness. Numbers fudge based on which gaskets you go with. Stocks would be 4.030, so I guess my numbers are clean.

If it was my ride, I'd be going with the 10.5 CR just because it doesn't require milling.

[J Industries]

Also the ls3 heads seem to be 68cc's so I might be perfect.

[pl4yboy]

Also the ls3 heads seem to be 68cc's so I might be perfect.

Also, it was brought to my attention that pistons may stick up past deck height slightly, like .008. That's going to raise it a little too. All my calculators were at deck.

[J Industries]

It's never a bad thing finding out you don't have to spend more money.

[Frenchy]

Bit late on this but as far as custom cams go, mine is an off the shelf unit with the LSA tightened up 2 degrees, that's it. My dyno chart looks exactly like I wanted it too, my truck drives, performs and sounds exactly how I wanted it to. It doesn't need to be a ground up one of a kind design to be best suited to your combo.

[J Industries]

I wasnt saying it had to be, but since it will be a nelson tune I will go by his advice.

On another note is 175 shipped a good price for a L92 truck intake, no TB.

[J Industries]

After much research, I think a cam like this would fit my requirements.
227/235 .614/.621 on a 113.

PL4yBOY what are your thoughts?