Gearing felt TALL on my first FJR Ride

[carlson_mn]

Where'd you get the acceleration graphs for both the GenI and GenII?

I used the data from a dyno run of a stock gen II bike. It's the red line in this chart:

I have the original DRF file, so I exported the raw data (no human error in reading the chart to get my data).

The max acceleration through all gears data is generated a program I started writing to analyze dyno data in more useful ways and to be able to actually compare potential performance between different vehicles, taking into account gear ratios, weight, etc. The Gen I acceleration data was generated from the Gen II dyno data (with the assumption that the engine hasn't changed), but taking into account the difference in weight and gear ratios between Gen I and Gen II. I believe I assumed an additional 200lbs of rider + gear on both bikes.

So what you're saying is that acceleration should be faster at 4500rpms where the TQ is above 80ftlbs than at 8100rpms, where it falls below 80ftlbs?

I think you're reading that chart wrong. The TQ is below 80 at 4500rpm, but right around 80 at 8000rpm. What I'm saying is that the acceleration is directly proportional to torque (ignoring air resistance). If you're comparing two different RPMs, whichever RPM has higher torque will give you more acceleration, as long as you are comparing RPMs in the same gear.

Nice work on the research you've done,

I still have a tough time understanding how a higher hp output won't provide more acceleration than an area lower in the powerband with more torque, but less horsepower. Even if torque figures are down a bit the higher rpms will result in more 'work/power' output? I always thought that was the point of HP measurement - the total amount of torque over time. You don't have to try to answer that one again though. Thanks

/threadjack

 

[HotRodZilla]

Oh for **** sakes...

Just ride the fuking thing! If it ain't what ya expected .. sell the damn thing.

Fuking ****.. This place is getting ghey.. :glare:

The constant dissection of this platform is really starting to piss me off. buy a fukin yugo

I was just thinking, "Man, these guys need to get some girlfriends or something." I'm glad you said it before I did. You were much more eloquent.

 

[mr.paul]

Oh, I get a kick out of power figures...for a minute or two.

Speed is relational, percieved speed is personal. I, like a number of Feejers, owned a Vmax before my 2006 FJR. The Vmax felt faster, but wasn't really. I know figures would show the Vmax had the first 1/8th mile but the FJR would take it by the end of the 1/4. But in the really important "feel" portion that everyday riding happens in, the Vmax felt like an angry beast clawing at the hopeless pavement, trying to rip your arms off. The FJR feels sophisticated and quick, but more linear. They both got into ticket range in a very short time. Interestingly, my wife's 2005 Honda ST1300, admittedly slower, is the bike that I feel I would get the most tickets on. It's smoothness and lack of feedback totally misrepresent it's speed. On a number of occasions I have busted over 100mph on that bike, thinking I was just at freeway speeds.

For much of life, perfception is reality.

mr.paul, from MInnesota

 

[charismaticmegafauna]

Speed is relational, percieved speed is personal.

The Vmax felt faster...the Vmax felt like an angry beast...trying to rip your arms off.

The FJR feels sophisticated and quick, but more linear.

For much of life, perception is reality.

Yep...:

"Snap" -- the FJR lacks snap... :blink:
Americans tend to like 'snap'... :huh:

 

[Fred W]

Speed is relational measureable, perceived speed is personal subjective.

8< 8< 8< 8< 8< 8< 8< 8< 8<

Interestingly, my wife's 2005 Honda ST1300, admittedly slower, is the bike that I feel I would get the most tickets on. It's smoothness and lack of feedback totally misrepresent it's speed. On a number of occasions I have busted over 100mph on that bike, thinking I was just at freeway speeds.

For much of life, perception is reality.

Huh? :huh:

No. Perception is just perception.

Reality is measurable and quantifiable.

That's why butt dynos are worth every penny you pay to run them.

And real dyno runs like UP's represent real data worth knowing, if you are inquisitive and want to KNOW what's going on, and not just perceive it.

 

[beemerdons]

Speed is relational measureable, perceived speed is personal subjective.

8< 8< 8< 8< 8< 8< 8< 8< 8<

Interestingly, my wife's 2005 Honda ST1300, admittedly slower, is the bike that I feel I would get the most tickets on. It's smoothness and lack of feedback totally misrepresent it's speed. On a number of occasions I have busted over 100mph on that bike, thinking I was just at freeway speeds.

For much of life, perception is reality.

Huh? :huh:

No. Perception is just perception.

Reality is measurable and quantifiable.

That's why butt dynos are worth every penny you pay to run them.

And real dyno runs like UP's represent real data worth knowing, if you are inquisitive and want to KNOW what's going on, and not just perceive it.

So Fred, you are saying you don't really trust butt dynos? You know, that is really going to hurt Bustanut joker's feelings! Fred W, you owe our Barry C. an apology!

jes' sayin' and nuff' said!