compression ratio calculator
 

i am building a motor to put in a crx but have a queston. Its a b18c1 (gsr) block with ITR piston and rods, if i put a first gen b16a head on it what would my compression be??

Formulas for compression ratio

(CylVolume + ChamberVolume) / ChamberVolume

cylinder volume = pi/4 x bore^2 x stroke

chamber volume = cylinder volume / compression ratio - 1.0

displacement ratio = cylinder volume / chamber volume

amount to mill = (new disp. ratio - old disp. ratio / new disp. ratio x old disp. ratio) x stroke

there ya go... figure it out

hehe - or you can do a Google search for displacement and/or compression calculator and go from there...

you have to measure the volume of the combustion chamber at least since it's an odd shape the rest is easy measurements

if the head is not ported, the chamber volume is well known

ok make it easy for the guy...he bascally has a home made itr motor b18c block with a itr head (sir/itr same casting) so you will have 11:1 ish...if you haven't milled the head...you basically have a itr with ****ty b16a cams...get soem better cams..atleast gsr's

Compression and Displacement Calculator

archive this bruno! :D

Ohhh that IS nice! :thumbup:

that made ya all horny didn't it? :naughty: :haha:

:nods: little bit :p