rangcrx you think you could check your pm's thanks?

 

Installing CTR pistons into a stock B16a block that has not been decked using a B16 head (un cut) and a stock head gasket will give you 12.132821051442619 to 1 compression ratio. People do not take into account the fact that when these pistons are installed into a B16a, they sit out of the cylinder 0.017". They have a positive piston-to-deck clearance.

 

Were are you getting your calculations ?

http://www.c-speedracing.com/howto/c...c/compcalc.php
Yields 10.801068956759683

These pistons come in a b16b (ctr motor) which yields 10.8:1
To my knowledge a b16a block is the same thing as a b16b block.

 

you should just get a b18 bottom end and put the ctr pistons in that and you will be very happy.

 

The b16b block is basically the same as the b18c1 or b18c5 but with a different crank,rods,and pistons. If you use the link provided to compute compression, be sure to change the piston-to-deck clearance at the bottom of the page to -0.017. Then you will see 12to1 compression. I have built one of these before and measured the piston to deck height my self.

 

now some 1 say he is wrong

 

i had the same set up in my b16 and the compression was all most 12.1. and it had the stock b16 head