Why does it seem like an F4 pulls harder than a F4i??
#11
08-04-2007, 02:11 AM
[sm=smiley25.gif]
#13
08-04-2007, 04:53 PM
RE: Why does it seem like an F4 pulls harder than a F4i??
im not sure what power on top you guys are talking about. clue me in.
both bike produce their peak power around 12.5k rpms. after you reach the peak its all down hill from there.
however, I recall seeing on bikez.com and somewhere else that at 10k rpms the f4 has about 3-4lb of more torque. thats a pretty good difference. I recall that the f4i has 46lb and the f4 has 50lb or so.
both bike produce their peak power around 12.5k rpms. after you reach the peak its all down hill from there.
however, I recall seeing on bikez.com and somewhere else that at 10k rpms the f4 has about 3-4lb of more torque. thats a pretty good difference. I recall that the f4i has 46lb and the f4 has 50lb or so.
#14
08-04-2007, 05:25 PM
RE: Why does it seem like an F4 pulls harder than a F4i??
Its not so much how much peak power it has or where it is on the dyno chart, but about how it delivers it. The F4i is a little bit more linear, while the F4 tends to spike a little more towards the top end, making it *feel* like it has a stronger top end. From what i've heard they're very very similar, but the F4i has a slight bit more midrange. But i don't have a dyno of each one in stock form to prove it.
But here's some data according to motorcyclistonline,com:
CBR600F4 ('00)94.8hp @ 12,50044.8lb/ft @ 10,00011.61 @ 115.9mph6.76 436lbs wet
CBR600F4i ('01)95.5hp @ 12,50042.6lb/ft @ 10,25010.71 @ 126.7mph 4.12 435lbs wet
The engine output is practically identical, but the 1/4 mi times are not. I'm guessing it's the gearing or additional overrev of the F4i that makes the difference...? Or perhaps the midrange pulls it through the gears a bit faster...i dunno.
Actually that may be bad 1/4 mi data for the F4. Here's the previous years stats:
CBR600F4 ('99)98.4hp @ 12,50045.8lb/ft @ 10,50010.86 @ 124.9mph 4.83 440lbs wet
Looks pretty much identical to me...at least when it comes to power and speed alone. I don't know what other updates were made to the F4i besides fuel injection and looks. I'm guessing it's a slightly different frame, but i could be wrong.
But here's some data according to motorcyclistonline,com:
CBR600F4 ('00)94.8hp @ 12,50044.8lb/ft @ 10,00011.61 @ 115.9mph6.76 436lbs wet
CBR600F4i ('01)95.5hp @ 12,50042.6lb/ft @ 10,25010.71 @ 126.7mph 4.12 435lbs wet
The engine output is practically identical, but the 1/4 mi times are not. I'm guessing it's the gearing or additional overrev of the F4i that makes the difference...? Or perhaps the midrange pulls it through the gears a bit faster...i dunno.
Actually that may be bad 1/4 mi data for the F4. Here's the previous years stats:
CBR600F4 ('99)98.4hp @ 12,50045.8lb/ft @ 10,50010.86 @ 124.9mph 4.83 440lbs wet
Looks pretty much identical to me...at least when it comes to power and speed alone. I don't know what other updates were made to the F4i besides fuel injection and looks. I'm guessing it's a slightly different frame, but i could be wrong.
#16
08-05-2007, 04:45 PM
RE: Why does it seem like an F4 pulls harder than a F4i??
So it sounds to me the Honda claim of a 5% increase is somewhat BS. It seems like the changes that were made to the engine in 01 allowed it to overrev a little more but cost it some tq in the process. Any one else jump fom a F4 to and F4i or visa versa, or has raced similar F4 to F4i?
So far it seems on engine performance they are very similar,I guess the decision will be based on handling, looksand price.
So far it seems on engine performance they are very similar,I guess the decision will be based on handling, looksand price.
Thread
Thread Starter
Forum
Replies
Last Post
