Mallett
Member
Posts: 511
Oh, what a ride!!!!
Laurel, Mississippi
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« on: May 07, 2013, 05:59:53 AM » |
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I was reading at a Darkside forum that if you run a CT you will lose horsepower...if true, how much?
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Any coward can fight a battle when he's sure of winning; but give me the man who has pluck to fight when he's sure of losing.
GEORGE ELIOT
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Jess from VA
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« Reply #1 on: May 07, 2013, 06:11:01 AM » |
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My bullsh!t meter just pegged.  |
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Mallett
Member
Posts: 511
Oh, what a ride!!!!
Laurel, Mississippi
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« Reply #2 on: May 07, 2013, 06:14:06 AM » |
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My bullsh!t meter just pegged. So no loss in HP, Jess? |
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Any coward can fight a battle when he's sure of winning; but give me the man who has pluck to fight when he's sure of losing.
GEORGE ELIOT
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JC
Member
Posts: 321
The Beast
Franklin, TN
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« Reply #3 on: May 07, 2013, 06:15:50 AM » |
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I don't see how the two are related, rubber on the road vs. engine HP. If anything, I would think more rubber on the road should mean more HP transferred to motion.
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Damn thing gives me the grins every time I get on it!
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Jess from VA
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« Reply #4 on: May 07, 2013, 06:23:20 AM » |
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My bullsh!t meter just pegged. So no loss in HP, Jess? HP is a function of engine size, compression, fuel, timing/ignition, air flow in and out. The only impact of a car tire is it is a heavier tire with a bigger contact patch. Never did a dyno, but my bikes' smoke most everything on the road regardless of rear tires used. |
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Pete
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« Reply #5 on: May 07, 2013, 06:25:21 AM » |
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Additional tire weight (rotating weight)would have a damping effect on acceleration.
I am not sure how accurate the butt dyno would be in reflecting this.
Rolling resistance could also affect acceleration as well as contact patch.
Again not sure the butt dyno could ascertain .
I would suspect that a real dyno could ascertain the actual effect. + or -
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Bone
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« Reply #6 on: May 07, 2013, 06:26:22 AM » |
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The final drive gear ratio will increase or decrease from stock if the tire is taller or shorter in diameter.
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jimmytee
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« Reply #7 on: May 07, 2013, 06:46:29 AM » |
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Additional tire weight (rotating weight)would have a damping effect on acceleration.
I am not sure how accurate the butt dyno would be in reflecting this.
Rolling resistance could also affect acceleration as well as contact patch.
Again not sure the butt dyno could ascertain .
I would suspect that a real dyno could ascertain the actual effect. + or -
The final drive gear ratio will increase or decrease from stock if the tire is taller or shorter in diameter.
Yes any increased or decreased weight could have a negligible effect on horsepower transmitted to the ground. Like above, don't know whether this would be noticeable. |
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"Go sell crazy somewhere else,we're all stocked up"
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Ricky-D
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« Reply #8 on: May 07, 2013, 10:27:43 AM » |
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Depends a lot upon which make of tire you're talking about.
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2000_Valkyrie_Interstate
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tank_post142
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« Reply #9 on: May 07, 2013, 11:17:15 AM » |
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you'll find you have more HP if you wear white.  |
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I got a rock  VRCCDS0246  |
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old2soon
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« Reply #10 on: May 07, 2013, 02:49:36 PM » |
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Front end of my I/S comes up a lot easier with a C/T than it ever did with a M/C specific tire. If yer an old drag racer-it hooks up and launches.  RIDE SAFE. |
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Today is the tommorow you worried about yesterday. If at first you don't succeed screw it-save it for nite check. 1964 1968 U S Navy. Two cruises off Nam.
VRCCDS0240 2012 GL1800 Gold Wing Motor Trike conversion
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Rio Wil
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« Reply #11 on: May 07, 2013, 05:33:03 PM » |
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Additional rolling resistance is virtually not worth mentioning (if running 40-44 psi) , addition rotational weight is almost worth mentioning (but not really), the big difference is if you install a 65 profile, a 60 profile or a 55 profile. The 65 profile is slightly larger in diameter than stock and will slow down acceleration a bit. The 60 profile is about stock and will be no noticeable change. The 55 profile will give the illusion of more hp because of smaller diameter and quicker rev....(can do a wheelie easier)...... I like the 65 profile because it reduces highway rpm about 200-300 rpm.
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Tropic traveler
Member
Posts: 3117
Livin' the Valk, er, F6B life in Central Florida.
Silver Springs, Florida
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« Reply #12 on: May 07, 2013, 05:45:20 PM » |
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Anytime you add unsprung weight to a vehicle driveline it will take more engine power to turn it. I would think that the small difference in weight would be negligible on a Valkyrie, at least offset by the traction factor of a CT tire contact patch as far as acceleration is concerned. That is if you can stand the crappy handling.  |
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'13 F6B black-the real new Valkyrie Tourer
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