PDA

View Full Version : question for historians (54ci vs 55ci)


aemsee
19th December 2010, 06:51
Just wondering if there is a reason that 883's are listed as 55c.i. in literature, when they are actually 54c.i.? Is it just a 'mine is bigger than yours' game that the auto manufacturers have always played? If so, who's engine was Harley trying to 'one-up'?

jnoonan1
19th December 2010, 06:56
When the cubic inches include a fraction, it is rounded up.

racerwill
19th December 2010, 07:00
usually mfgrs round up to the next popular number but 883CC is actually 53.8 CI..... I think it goes back to the Ironhead 900 CC engine which is 55CI and when it got re-invented in the Evo confiruration, they just kept the 55CI

just my guess....

Ww

aemsee
19th December 2010, 07:04
When the cubic inches include a fraction, it is rounded up.

Yup. Which puts it at 54 c.i.

gunterjaeger
19th December 2010, 07:06
Yeeeeeeeeeeeeuuuuuuuup!

Baphomet
19th December 2010, 07:07
usually mfgrs round up to the next popular number but 883CC is actually 53.8 CI..... I think it goes back to the Ironhead 900 CC engine which is 55CI and when it got re-invented in the Evo confiruration, they just kept the 55CI

just my guess....

Ww

I agree with your guess.

PilotCrabby
19th December 2010, 07:48
most likely just a marketing tool.

Rogster
19th December 2010, 10:25
Dont know about the ci part but I've been told the 900 was actually 883 but same as the fraction in the CI it was rounded up to the even number 900..much like a yamaha 650 isnt called a 647...Rog

Tin Man 2
19th December 2010, 14:10
The 396 C.I. 375 H.P. Chevy was really a 402 C.I.D. engine, so you see its not a mine is bigger thing, Its a marketing thing, 396 just had a better ring to it than 402 so Chevy kept the number on the big 396s just like the little 396/325s. I believe a 350 Honda was really only a 343 or some such thing.

Doc45
19th December 2010, 16:27
"220, 221. Whatever it takes." :D

Mosey
19th December 2010, 18:59
I have an old Yamaha XS1100 that is really 1101 cc's. Makes me so mad that I can barely ride...

aemsee
19th December 2010, 19:09
I have an old Yamaha XS1100 that is really 1101 cc's. Makes me so mad that I can barely ride...

thanks for your witticism. not sure when I'll stop laughing.:doh

I am looking to replace the '883' air cleaner insert with one in c.i. I was going to use 54 c.i. until I saw that the 883 is refered to as a 55 c.i. So it just made me curious.