Chris Troudt wrote:
>
>
> "Around" 9.5:1?
>
> IMHO, if you're going to all the trouble to get the squish band
> correct then you should also match the compression ratio of the
> front and rear cylinders. Taking off the same amount of metal
> (total of 0.065") is no garauntee that the compression ratios
> are matched. The area of the cylinder bore cross-section and
> the aread of the D-shaped chamber cross-section differ somewhat.
> Let's say you take 0.015" off one jug and 0.050" off that head.
> Then you take 0.020" off the other jug and 0.045" off that head.
> Your compression ratios are not matched, and if you want a real
> smooth runner that makes a difference. The better approach is
> to set up the squish band correctly and then CC the heads to
> determine the exact cut required to get the desired compression.
>
> --
> CT AH#40
I agree, I will match the cylinders to 0.1:1 within each other on CR,
-IF- I'm getting paid to do it.
Many of my customers aren't able or willing to pay for several hours of
cc-ing and dicking around, that's why I came up with a safe quick way to
boost the cr and not break the bank.
Just spin and shave, and put it back together.
It's a compromise between time and money.
HogDr
--
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