ok i got my pistons in for the 6.0 today...im hopin to get low 10's on the compression...the piston size is 4.030...they are dished...and my heads are gonna be about 72cc or so...what else do u need to know to figure out the compression? thanks!!

 

What is the dish size? They're diamonds right? If so they are probably .010" above the deck?(What is the compression height on the box) Head gasket thickness plays a role but, a good idea can be figured out using the stock specs.

Get that stuff and I'll let you know.

370ci right.

 

YES THEY ARE DIAMONDS AND IT IS A 370...the only thing i could find on the spec sheet that u listed is the compression height...it is 1.315 if that helps

 

Wellllllll, that helps a little bit but, depending on the dish size it would be real hard to guess.

Need to have dish cc.

 

just assume .010 above deck or whatever u said...b/c i cant find it anywhere

 

Ok I'll go ahead and figure your compression ratio using a stock gasket, 1.315 compression height( = .011 above the block deck), 72cc heads, and dishes from 6-13cc.

<font class="small">Code:</font><hr /><pre>
Dish size Compression ratio
6 9.65:1
7 9.55:1
8 9.45:1
9 9.36:1
10 9.27:1
11 9.18:1
12 9.09:1
13 9.00:1
</pre><hr />

If you want in the low 10:1 area you'll need to go with a smaller combustion chamber on the head. Probably somewhere in the low to mid 60 cc range

 

thanks for the help man...ill probaly go with the new patriot ls6 heads which are 64cc