Drive shaft power loss?
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From: DOG POO ON Ur LAWN
Originally Posted by Stephenopoly,Jun 5 2006, 06:18 PM
where can we get a lightweight drive shaft?
The S2k is estimated to have 15-18% drivetrain loss due to it being RWD. It is better then a trypical FWD car where losses can be upward in the 20% range.
The majority of the losses are in the Transmission and Rear Diff, where most of the friction is found. The best or cheapest thing you can do for those components is switch the fluid out to synthetic. ie. Amsoil Synchomech in the trans, Amsoil or Motul 80W90 in the diff.
Another thing to keep in mind is larger diameter wheels or big brake kits. On the rear wheels they can result in power losses. Larger diameter wheel/brake rotors means higher Centripetal force...meaning the more force is needed to turn that weight, resulting in less power put down to the road.
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From: Dry Branch
Originally Posted by Stephenopoly,Jun 5 2006, 06:18 PM
where can we get a lightweight drive shaft?
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From: Dry Branch
Originally Posted by SenderGreen,Jun 5 2006, 08:09 PM
Spoon Sports has one.
Do you know the price? All I can remember is that it was too expensive for my tastes.
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From: Texas City
Originally Posted by SpitfireS,Jun 4 2006, 02:37 PM
IMO lighter drivetrain components don't really free up horsepower, they make those components speed up / accelerate faster.
And it takes just a little bit less power to keep them lighter parts spining.
Most powerloss is due to friction.
And it takes just a little bit less power to keep them lighter parts spining.
Most powerloss is due to friction.
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From: Atlanta, GA
I just weighed my driveshaft, and it is 16.8lbs. It doesn't appear that the Spoon one is any lighter by the description:
I would guess that one could have the modifications done to the driveshaft on their own, if you can find a company with a Hines balancer.
For a lighter one, I would look into the Aluminum ones. I have read of issues occuring with the CF ones, and the Aluminum ones are actually lighter by a pound.
--
Brian
The Spoon propeller shaft for S2000 is a stock Honda unit that has been disassembled then reworked and reassembled by Spoon technicians. The reworking involves the polishing of internal components to reduce friction and smoothen operation. Furthermore, the rotational balance of the shaft is improved from the standard 1.3kg/cm2 to 1.2kg/cm2 This smoothens and improves the shifting feel, eliminating the notchy 2nd gear engagement common to S2000s. (Note, to improve driving smoothness, Spoon uses the rotational balance value of 1.2kg/cm2 as the standard for all rotating parts such as the flywheel and brake rotor).
I would guess that one could have the modifications done to the driveshaft on their own, if you can find a company with a Hines balancer.
For a lighter one, I would look into the Aluminum ones. I have read of issues occuring with the CF ones, and the Aluminum ones are actually lighter by a pound.
--
Brian