Im getting 12.1:1 and dont think its right. I have seen Zeal calc be wrong before

can somone please do the math and verify what the compression would be?


h23a1 block, rods, crank.

h22 type S pistons

h22a4 head.

OEM three layer gasket

I just dont think 12.11:1 sounds right.

TIA

 

Do you know the piston to deck height?

 

Ok, I'm getting 10.54:1 using a piston to deck clearance of zero... which is way off from what zeal said.

If you know your clearance, try putting it in here..

CR = (38.06867 + clearance) / (3.61117 + clearance)


edit: My work, anybody see anything wrong?

 

yea, thats why im asking. it looks right but w/o DC then... blah

ttt

 

http://www.bsperformance.com/compcalc/compcalc.htm

 

Looks like -.02 for H22A pistons in a H23A1 block. I'm guessing the Type S ones are the same, except they have the 3.9 cc dome.

Unfortunately, it looks like that calculator is assuming you have H22 rods which could be why it gives 11:1. Since yours are shorter, I got 10.6:1 with the pistons being .02 out of the hole. Only problem is, they might not be that far out because of the shorter rods.. ugh.

 

Right but im using the h23 rods/crank with typs pistons. I used two different calculators and got two answers, 12.11:1 and 12.25:1

I dont see how your getting 10.6:1