kawboy81
Expert Class
Busa Eater
Posts: 273
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posted January 08, 2009 06:12 AM
hp to weight ratio
does anybody know a hp to weight ratio? best way to describe what im asking is........ say i weigh 190, and my bike puts out 200 hp......(just using a even number) lol....... and i gain 5 lbs, how much hp does that take away.... i mean i know its not actually losing hp but its having to work harder to pull me therefor i go slower..... so about how much u loose in hp per lb gained?
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07 LE bolt on bike
  
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street racer
Expert Class
Posts: 141
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posted January 08, 2009 06:16 AM
Motorcyclist magazine claims loss/gain of 7 pounds equals about one horsepower.
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kawboy81
Expert Class
Busa Eater
Posts: 273
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posted January 08, 2009 07:23 AM
thanks thats just what i was looking for.... so theres no way to tell whats really overweight or when ur taking away from ur bike? like what lb rider it was built for? example.....i know a guy thats like 260 and was saying his 08 1k gixxer is faster than my 14 because its lighter and puts out the same hp. i told him he full of shit cuz if it did, ur losing anything u may have had over me cuz of his weight. he was saying that it tote him fine. im done arguing with him, just gonna spank that ass when weather lightens up. but it did get the brain thinking and i wanted some facts.
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07 LE bolt on bike
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SubZer0
Novice Class
Posts: 66
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posted January 08, 2009 07:30 AM
Weight has no effect on top speed. Top speed is only effected by drag. Weight effects acceleration.
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Ninja14
Pro
Posts: 1136
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posted January 08, 2009 08:41 AM
My friend is 230 and rides a 600 at the track(twisty track - not drag)....he also has the lap record.....so...practice before diet :-)
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2006 Turbo ZX-14.
2005 V-max 20th Anniv.
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Bawls
Needs a job
re-learning to ride
Posts: 2701
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posted January 08, 2009 08:47 AM
We've always used 8 lbs as a hp and it's proven to be pretty good.
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Best 60ft: 1.42
Best 1/8th: 5.97
Best 1/8th MPH: 119
Brockland Police Badge # 001
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Sticks_n_Stones
Needs a job
Posts: 3930
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posted January 08, 2009 10:25 AM
5000lb+ vehicles = 15lbs equals 1hp or 2ftlbs torque on a diesel
3000lb vehicles = 10lbs equals 1hp
?700lb bikes = 7lbs equals 1hp?
Seems to follow the general order of hp to weight. My brother is "into" drag racing diesels and the 15lbs to 1hp is there rule-- though that might be skewed by there overt reliance on torque versus horsepower. Of course, once you reach really serious professional level speeds weight doesnt seem to be as important as traction...
Something to consider: Once you get into the low 9's you run into steep end of the "Increased hp to decreased elapsed time" curve (for a bike, heavier vehicles notice this sooner). That is the point where ever increasing (almost squared) hp is required to get elapsed time gains.
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'06 zx14
Muzzy M10/M14
PCIII w/ Muzzy map
Flies out K&N in!
bits n pieces...
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smokehouse4444
Zone Head
XX to ZX
Posts: 648
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posted January 08, 2009 10:46 AM
Don't know if this is exactly true or not, but a very experienced drag racer that I ride with likes to say that each 30lbs is about a tenth in the 1/4 for the big bikes (12's, Busas, 14's etc...). I wonder if that is the same with the liter bikes?
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2008 Atomic Silver ZX-14, Brock's this and that, some other stuff, 260 in full gear, powered by Cheese
2005 Ducati 999 with all the goodies
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01smokes
Needs a job
Posts: 2243
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posted January 08, 2009 03:19 PM
quote:
Don't know if this is exactly true or not, but a very experienced drag racer that I ride with likes to say that each 30lbs is about a tenth in the 1/4 for the big bikes (12's, Busas, 14's etc...). I wonder if that is the same with the liter bikes?
i have a friend that is 20lbs less than me and he will pick up 2 MPH over me
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PayPal, vigilart22@yahoo.com
Email, artvgl@yahoo.com
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bawls
Needs a job
re-learning to ride
Posts: 2701
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posted January 08, 2009 05:02 PM
Supposedly It takes approximately 3hp to gain 1mph on a bike like ours.
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Best 60ft: 1.42
Best 1/8th: 5.97
Best 1/8th MPH: 119
Brockland Police Badge # 001
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Ninja14
Pro
Posts: 1136
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posted January 08, 2009 06:26 PM
Sometimes weight is good - helps traction........
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2006 Turbo ZX-14.
2005 V-max 20th Anniv.
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