Quote:
Originally Posted by 69halfton
this cant be right..
if you do multiply by 61.3... how come 8.1L x 61.3 = 496..
and 502 / 61.3 = 8.1?
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Dude, you got to take off your other shoe and count those toes too.
Actually, if you want to be nit-picky about it….
8.1 x 61.3 = 496.53
(rounds up to a 497 CID)
502 / 61.3 = 8.1892333789559543230016313213703
(rounds up to a 8.2L)
I doubt 61.3 is actually the natsazz conversion but it is pretty darn close. There really isn’t a big CID displacement change when you get down to tenths of liters. That said, 61.3 still gets you pretty dang close to what they are. Unless you want to go out and measure the bore and stroke of all these engines with ISO certified measuring devises and post up your results.
Keep in mind no two engines will be manufactured
exactly the same with the
exact same bore and stroke and there will be upper and lower spec limits spread over large quantities of engines manufactured that will need to be factored into your equation. Plus you will need to recertify your ISO certified measuring devise after 100 engines. So, when you’re all done averaging your ISO certified tool results and averaging all the bore and stroke samples of engines like the manufactures do you would probably come up with 496 CID for the 8.1L and 502 for the 8.2L.
61.3 sounds like an easy conversion now don’t it?