you guys are best to ask since its about my b16a2 motor not the ef civic its gone into. since doing the swap the original(mechanical) speedo was useless. so i purchased a kit to make a digital rev-counter and altered the rate to use it as a speedo(it looks really cool). the only problem is how to calibrate it. i think i've got it somewhere near(and following someone on the other end of a mobile would be just a bit difficult), so my question is this, any idea what speed equates to what rpm in whatever gear? at the moment it reads 99 on the revlimiter in third but i can work with any gear at any speed(the higher the better tho). also, on my old 1400cc engine every 500rpm in fifth gear equated to an extra 10 mph (eg: 4000rpm = 80mph). it feels the same with this engine, and it couldnt be shorter geared could it? if so it will do 145 on the flat and i want to back this up. any help will be much appreiciated as the police are well keen to take your licence off u for doin 31mph

 

anyone??? maybe hav a look next time u drive?