Does weight play a role in acceleration? Who wins??
Former Sponsor
Joined: Apr 2007
Posts: 5,360
Likes: 453
From: Davie, FL
- Started building my frame with chrome molly 4140 (did not weigh the frame but it is lighter than steel because of the reduced tube thickness) & built a one off aluminum swing arm at 17#.
- I added one off 17" C/F wheels but put road tires on them which weigh in at 40#/pair in place of 19#/pair for racing tires that get 2K miles @ best before replacement is necessary.
- I made an Inverted fork, aluminum triple trees, hollow chrome molly axle & calipers (complete w/o fender @ 36.9#). It has 30mm Ohlins cartridges inside of them. The rotors weigh 2.2#/each, they are MMC 13".
- The motor is a TP 113CI worked and a 6 speed with chain drive & Sportsman Bandit clutch. I am running belt rear.
- The fenders are painted C/F and the tank is steel. The oil tank is stainless.
Road Master
Joined: Feb 2009
Posts: 766
Likes: 6
From: South Dakota
Perfect example here. I have multiple dyno sheets from both bikes. Different Dyno's, different states etc.. All come out with very close to the same numbers.
I weigh 205, She's 125.
2010 FLHX, Power duals w 4" Rineharts, SE255 Cams, SE Intake. 89HP, 98TQ
Wife's '02 Road King
V&H True Duals, 3" Rineharts, Stock Cams, SE Intake. 78HP, 89TQ
From a stop, she can get a wheel ahead of me and stay there. Doing a Roll on in the Cam's Sweet Spot I can pull away from her. Without cam's in mine, I'm certain she would be faster. Hence why I left her stock cams in when upgraded the Cam plate. Hers was already stout enough. She would hand my bike its lunch, which was nearly 2.5x as expensive after all my add-ons..
Also note, that's a 96" vs 88". The little 88 is able to rev quicker too.
I weigh 205, She's 125.
2010 FLHX, Power duals w 4" Rineharts, SE255 Cams, SE Intake. 89HP, 98TQ
Wife's '02 Road King
V&H True Duals, 3" Rineharts, Stock Cams, SE Intake. 78HP, 89TQ
From a stop, she can get a wheel ahead of me and stay there. Doing a Roll on in the Cam's Sweet Spot I can pull away from her. Without cam's in mine, I'm certain she would be faster. Hence why I left her stock cams in when upgraded the Cam plate. Hers was already stout enough. She would hand my bike its lunch, which was nearly 2.5x as expensive after all my add-ons..
Also note, that's a 96" vs 88". The little 88 is able to rev quicker too.
Last edited by SDVmnt; Jun 22, 2012 at 08:43 AM.
Outstanding HDF Member
Joined: Jun 2012
Posts: 2,248
Likes: 7
From: Atlanta, Georgia
Hi All,
Just curious how much of a role weight plays in the acceleration ability of the touring bikes. I never realized there is a 150lb difference (give or take) between a Road King and an Ultra even though the frame and mechanical components are identical.
All else being equal how much HP would be required to overcome the weight of the Ultra to keep up with a RK? I got to thinking would a stock RK be able to keep up to a stock CVO Ultra since the Ultra has more weight to accelerate?
Guys at work were throwing it around the other day and a number that was thrown out was 15% more power to keep up. Sound right??
J.
Just curious how much of a role weight plays in the acceleration ability of the touring bikes. I never realized there is a 150lb difference (give or take) between a Road King and an Ultra even though the frame and mechanical components are identical.
All else being equal how much HP would be required to overcome the weight of the Ultra to keep up with a RK? I got to thinking would a stock RK be able to keep up to a stock CVO Ultra since the Ultra has more weight to accelerate?
Guys at work were throwing it around the other day and a number that was thrown out was 15% more power to keep up. Sound right??
J.
Tourer
Joined: Apr 2012
Posts: 325
Likes: 2
From: Texas
Could you please help me out here? I have a problem with my bikes weight as my bike is much heavier than yours. Could you please let me know where I went wrong on reducing my weight as my bike is 20% heavier than yours. I will give you some facts on what I must have did wrong.
Beautiful bike by the way!
Cruiser
Joined: Jul 2008
Posts: 233
Likes: 0
From: Mississippi
And I have a 2003 Mustang Cobra with lots of goodies that has taught a lot of folks a lesson in street drags AND can touch 160 really fast....best of both worlds
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Road Warrior
Joined: Jul 2006
Posts: 1,302
Likes: 61
From: Near YVR
Everyone knows that Black M/C's are the fastest!
It is good to see civilized discussion on this with good info and some good fun.
Rob
