91si

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??

bbarbulo

iTrader: (2)

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

HAPPY

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

imported_gatherer

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

bbarbulo

iTrader: (2)

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

dingus88

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

Jugglez

Compression and Displacement Calculator

archive this bruno!

bbarbulo

iTrader: (2)

Ohhh that IS nice!

Jugglez

that made ya all horny didn't it?

bbarbulo

iTrader: (2)

little bit