CAN-AM (BRP) Discussions about CAN-AM ATVs.

Drag racing food for thought.

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  #21  
Old 11-26-2002, 12:27 AM
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Default Drag racing food for thought.

I run an adjustable cam, adjustable ignition is soon to come.

Why would you need a six piston rear caliper to slow you down? I can lock up the rear end easily at any speed.
I personally would want to lose the the rear brake. You want to lose as much of the driven rotational mass as possible. You can lose more weight by dropping the front brakes but that weight isn't as important. I heard that every pound that is saved from the rotaional mass is worth 10 pounds of dead weight off the vehicle. That might be an exaggeration though.
Why isn't the front disk as important, they are rotational mass.

I read in motorcycle consumer news that 1 pound of centrifical weight and three pounds of dead weight were equal.



30 degree backcut
[img]i/expressions/face-icon-small-happy.gif[/img]

Now this is what I have missed seeing on here!!!!!!!
[img]i/expressions/face-icon-small-smile.gif[/img]!!!!!
 
  #22  
Old 11-26-2002, 01:11 AM
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Default Drag racing food for thought.

Chromoly frame purpose built -30 lbs
Lightened crank aprox 5 lbs off recip
Flywheel lightened, charging system removed 3-5 lbs off recip and no generating drag
Total loss electrical system would necessitate battery charging between rounds though.

Yah I don't have much to do either.
 
  #23  
Old 11-26-2002, 07:26 PM
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Default Drag racing food for thought.

[i]
Why isn't the front disk as important, they are rotational mass.

I'm not positive but I believe that since the rear disc is rotational mass that is driven throught the powertrain, it is more crucial. I don't know, maybe the rotational mass on the front is as important. I'm glad you brought it up...hmmm
 
  #24  
Old 11-27-2002, 06:02 AM
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Default Drag racing food for thought.

You also have to consider wave rotors for which ever you chose, since they are lighter. I don't know if they front/back thing is right it just makes sense to me.

Good thread BTW
 
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Old 11-27-2002, 09:24 AM
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THAT!!!!!Sounds down right sexy!
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Default Drag racing food for thought.

rotaional mass on the front is not the same as in the rear but wolud be more of a weight thing???[img]i/expressions/face-icon-small-wink.gif[/img]
 
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Old 11-27-2002, 11:53 AM
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Default Drag racing food for thought.

I have no idea what kind of ride this is, but thought it might go well with this topic.
There are other pics of drag machines here also
drag bike
drag2
 
  #27  
Old 11-27-2002, 02:30 PM
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Default Drag racing food for thought.

AZ not syaing you are wrong, just wondering if you can explain why?
 
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Old 11-27-2002, 04:37 PM
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Default Drag racing food for thought.

i went from stock ds weight to 460lbs. and did not go any faster in 300 feet. i was disappointed.
 
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Old 11-27-2002, 06:54 PM
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Default Drag racing food for thought.

Originally posted by: dsmike
i went from stock ds weight to 460lbs. and did not go any faster in 300 feet. i was disappointed.
Wow, I'm surprised. Was that from just one run, or an average of many runs? I'm sure it would make a much bigger difference in hillclimbing though.

 
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Old 11-27-2002, 07:38 PM
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Default Drag racing food for thought.

it might have picked up a few thousands of a second. and a 1/4 of a mph. i'm at a point with my bike it is hard to get it faster, a stock bike would more than likely pick up. don't think in tenths of a second. a tenth is very hard to get. 650manica went from running all shocks to struts and picked up .030 (5.20-5.17)seconds in 300 feet. i think that the struts is the best way to get better times. after he and i didn't pick up very much from the struts i run my shocks at the sand drags now.

on a 2 stroke weight really seems to help. i think it is because of my power and torque that the weights don't seem to effect it.


i have let bigger riders than me drive it and they think that weight doesn't effect it either. to go fast is in the motor more than the weight of the bike. if you lost 100lbs you would be able to tell a difference in 300 feet. but i don't not know of a 100 pounds that can be deleted from the bike
 


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