compression

[bigdemo1]

If I have a stock bore and stock stroke with my flat top piston .080"in the hole and a .040"head gasket also a set of RHS heads with 64.5 cc's with flat face 2.02"intakes what is my comp can some show the math please so I can check mine.

 

[fishy68]

Need engine size. Can't compute it without it.

 

[bigdemo1]

D'oh sorry 360 LA

 

[jefflock]

I'm not sure how to figure it with .080" down in the hole.

 

[fishy68]

If the pistons have no valve relief's it comes up to 9.19 to 1. If the pistons have 5 cc valve reliefs it is 8.76 to 1. That's according to the calculator on my desktop dyno program. I've noticed some calculators vary a little so each number is give or take a smidgen.

You can also go here to figure it yourself

http://www.csgnetwork.com/compcalc.html

It seems to coincide with the Desktop dyno program to the T.

 

[Brian Hafliger]

If I have a stock bore and stock stroke with my flat top piston .080"in the hole and a .040"head gasket also a set of RHS heads with 64.5 cc's with flat face 2.02"intakes what is my comp can some show the math please so I can check mine.

I get 9.4:1 with no reliefs.