Turbo95Max

iTrader: (25)

Ok
i am back trying to get some buyers for the custom copper head gaskets im getting made. I have more info. stock head gasket is .038" thick these custom copper ones will be .043" thick. Price is expensive at $130 per set. I think he'll do $120 tho. If any of you guys might plan to go all out in the future, please buy now so i can get these started up. its been a long 12 months of building my motor and i hope i can finish it this year!. Thanks

vmok

Will that increase in gap lower the compression by any appreciable amount?

Daniel B. Martin

Let's do the math to answer this question.

The volume of each cylinder in a VQ30DE engine is 498 cc. The compression ratio is 10.0 to 1. This tells us the volume of the combustion chamber is 55.3333 cc.

The copper head gasket is 0.005 inches thicker than the stock gasket. Converting to metric measures, this is 0.0127 cm. The bore of the VQ30DE engine is 9.3 cm. The added volume of the combustion chamber would be 3.1415926 x (9.3 / 2)**2 x 0.0127 = 0.8627 cc. The total volume of the "new" combustion chamber is 55.3333 + 0.8627 = 56.196 cc.

Computing the "new" compression ratio, (498 + 56.196) / 56.196 = 9.86.

vmok

Wow... nice math. Now I know why it took me 3 quarters to pass Calculus 'A' in college!

-V

Oh, I guess that means that it will lower by somewhat... but probably not by any appreciable amount for n/a vehicles (except that those people who want to use 87 octane fuel all the time can expect less detonation)... I guess every little bit helps for the forced induction crowd!

Turbo95Max

iTrader: (25)

wow, thanks for the Math Daniel....i wouldnt have been able to figure that one out. With that said.....anyone interested? cmon guys, i really want these done so i can finish my motor....if anyone wants it in the future, juss buy them now so we can get them made.