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83 gs750e build thread

  • Thread starter Thread starter tarzanscot
  • Start date Start date
posplayr said:
The estimate is a little on the high side, as it represents the increase in hp required due to frontal area drag. Frontal area drag required hp that increases to the 3rd power of velocity. Any internal drag terms such as engine drag or to the extent that rolling resistance do not increase to the square of velocity then all drag components do not contribute to the 3rd power rule.

Hp = Force x velocity
C x V^2 x V = C x V^3

However it was interesting that Chef and I were BSing one day and used the formula to estimate the horsepower and top speed of the world record holding busa and then related that to KrisV's nitors/turbo 1150. I don't have the figures but the conclusion was that the model worked well to predict top speed/hp requirements. It ignores gearing and RPM obviously.
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It may be a little high, but I estimated by taking a bit off what the Kawasaki makes thinking it can go a bit faster yet. Interesting though that frontal area drag is related to velocity cubed. I guess that explains why incremental increases in speed once you get past 120 are not trivial. I'll make a note of that.

You gotta be slippery - that's the real key to speed.
 
reddirtrider said:
It may be a little high, but I estimated by taking a bit off what the Kawasaki makes thinking it can go a bit faster yet. Interesting though that frontal area drag is related to velocity cubed. I guess that explains why incremental increases in speed once you get past 120 are not trivial. I'll make a note of that.

You gotta be slippery - that's the real key to speed.
Click to expand...

Red

Drag is proportional to Vel ^2

HP = Force (e.g. Drag force) times Velocity

Hence Horse power is proportional to Vel^3

Horsepower is a measure of ability to perform work which is applying a given force at a specificed velocity. Example pushing against 100 lbs at 10 ft/sec.

http://www.howstuffworks.com/horsepower.htm
 
posplayr said:
Red

Drag is proportional to Vel ^2

HP = Force (e.g. Drag force) times Velocity

Hence Horse power is proportional to Vel^3

Horsepower is a measure of ability to perform work which is applying a given force at a specificed velocity. Example pushing against 100 lbs at 10 ft/sec.

http://www.howstuffworks.com/horsepower.htm
Click to expand...
Dude, my mind is full I'm not going to read articles on stuff I'll never use in a theoritical sense. I have more than enough problems keeping up with work.

Anyway, thanks for the clarification. I was thinking drag was related to the square of the velocity in the first place but misread your post and just went with it.
 
reddirtrider said:
Dude, my mind is full I'm not going to read articles on stuff I'll never use in a theoritical sense. I have more than enough problems keeping up with work.

Anyway, thanks for the clarification. I was thinking drag was related to the square of the velocity in the first place but misread your post and just went with it.
Click to expand...

Red,
Most of the time when I post I know you either know it or just forgot about it :p and so it is partially a memory jog as well as for anybody else that might read my post and start asking even more questions. :rolleyes:
Jim
 
posplayr said:
Red,
Most of the time when I post I know you either know it or just forgot about it :p and so it is partially a memory jog as well as for anybody else that might read my post and start asking even more questions. :rolleyes:
Jim
Click to expand...
I know you're giving me a hard time, but when I look back at some of the mathematical problems we had to solve in school I just scratch my head and wonder who did that - it sure looks like my hand writing. ;)

You won't believe how many times I set my glasses down when working on bikes and 2 minutes later wonder where I put them. Dazed and confused.
 
reddirtrider said:
I know you're giving me a hard time, but when I look back at some of the mathematical problems we had to solve in school I just scratch my head and wonder who did that - it sure looks like my hand writing. ;)

You won't believe how many times I set my glasses down when working on bikes and 2 minutes later wonder where I put them. Dazed and confused.
Click to expand...

I have to ask the wife to help me find mine before I sit on them. :eek:
 
alright i havent got it out to test the top speed yet but i do plan to slay the dragon in a couple of weeks so maybee on my ride over i will attempt it. But i have some more pics of mods.
 
removed the steel mount an fabbed up a aluminum mount for fuse box
 
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