as the topic says how reliable of a site is http://www.c-speedracing.com/h...c.php as a source for calculating c/r of a motor. My application is a stock b16 head w/ stock b18a1 block with oem 3 layer h/g. If that source is right then it says my c/r should be around 9.5:1 or so. Anyone care to differ?

 

anybody?

 

I find its not bad, but missing a few fields. I like the ZealAutowerks http://www.zealautowerks.com/ one a bit better. None of them are COMPLETELY accurate, but they do give a decent idea of where one needs to be, and if it is not the right setup. I've built a couple of High compression NA engines based off of it, but not as many turbo cars.