icarus
Expert Class
Posts: 344
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posted April 02, 2009 02:58 PM
BST's and horsepower
Has any seen or know of the amount of horsepower freed up by the use of BST wheels?
I'm just curious to see what the RWHP change would be on a dyno. Thanks.
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8.820 @ 161.05
  
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Shane661
Needs a life
Posts: 11494
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posted April 02, 2009 05:19 PM
Some tech on the wheels:
http://www.blackstonetek.com/Inertia.htm
I doubt you would see a ton on the dyno...I'm guessing 5 hp or less?
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Wheelie
Needs a life
Old Man
Posts: 6902
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posted April 02, 2009 05:27 PM
I dont think you would gain hp would you?
wee
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Shane661
Needs a life
Posts: 11494
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posted April 02, 2009 05:30 PM
Well, a heavy tire can give lower dyno readings...so it would stand to reason that a lighter wheel might show additional hp.
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icarus
Expert Class
Posts: 344
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posted April 02, 2009 06:03 PM
I'll probably have to see if Brock has tested this on his dyno. I guess you could call it a gain
but I was thinking more along the lines of having more available horsepower to move the
bike rather than turn the wheel.
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8.820 @ 161.05
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masszx14
Pro
A mind beside itself!
Posts: 1806
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posted April 02, 2009 06:19 PM
When I put lighter wheels on my car the numbers stayed the same.
The weight difference was not nearly as dramatic as with the CF wheels though.
Interesting to find out if Brock recorded any gains.
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universal@mind
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Bawls
Needs a job
re-learning to ride
Posts: 2701
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posted April 02, 2009 08:09 PM
I'd still like to see if brock gained much ET by changing them out.
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Best 60ft: 1.42
Best 1/8th: 5.97
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JDC
Zone Head
Posts: 570
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posted April 03, 2009 10:49 AM
 Edited By: JDC on 3 Apr 2009 18:51
You will 'gain' HP, but not on the dyno, since the dyno does not HP for real life moving mass. It will arrive from dropping weight, and your HP/weight ratio changing for the stronger.
As an example, take your OEM weight/HP then your new weight/HP... very small drop in moving mass -vs- HP.
If your bike was 585 lbs and 165 HP , that would be 3.54 lbs per HP - 3.54:1
Drop 10 lbs .... . 3.48 lbs per HP... - 3.48:1
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kawasakijockey
Pro
Posts: 1876
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posted April 03, 2009 11:58 AM
quote:
You will 'gain' HP, but not on the dyno, since the dyno does not HP for real life moving mass. It will arrive from dropping weight, and your HP/weight ratio changing for the stronger.
As an example, take your OEM weight/HP then your new weight/HP... very small drop in moving mass -vs- HP.
If your bike was 585 lbs and 165 HP , that would be 3.54 lbs per HP - 3.54:1
Drop 10 lbs .... . 3.48 lbs per HP... - 3.48:1
You will see rotating mass hp differences, not static mass difference.
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Get on the shortbus boys 'cause its time to get schooled.
2007 ZX-14
1.38 60ft
9.03 @ 149mph
8.95 @153 small shot n2o
8.68 @160mph 5lbs boost
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bigdtd
Needs a job
Interceptors
Posts: 4209
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posted April 03, 2009 02:07 PM
translation = it will be quicker
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2006 Black ZX-14,6 inches over,16/42, flies out,BMC Street Filter,Brock's Street Meg,Brock's Radial Mount Strap,PClll with Race map,Dynojet LCD w/Techmount, ZX-14 fender eliminator,Pilot Power2CTs,Speedohealer,Pazzo Levers,Cox Radiator Guard, Garmin Nuvi 265WT
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icarus
Expert Class
Posts: 344
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posted April 03, 2009 02:52 PM
Last time I was there Jason told me they dropped from a 40 to a 38 tooth sprocket to
keep the wheelies under control.
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8.820 @ 161.05
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extrapilot
Expert Class
2008 ZX14
Posts: 155
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posted April 04, 2009 03:47 PM
I would think that acceleration would be the biggest gain factor, less mass to overcome the resistance to accelerate.
'pilot
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'pilot
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KSPZ3
Expert Class
Posts: 334
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posted April 04, 2009 04:18 PM
quote:
translation = it will be quicker
But not faster - i.e. terminal velocity will not improve - and traction at speed may become an issue sooner -
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