Save weight dump the gear box

mutley · 09-21-2009, 01:58 PM

Save weight dump the gear box

As the project is about removing as much weight as possable.

(No Gearbox) that's a lot for weight, including clutch, flywheel, gear stick assy, comes in at 65kg's 2 x = 130kg's . That would feel like an extra 26hp . Plus will also free up whp as no more gearbox losses, would end up giving back around 30hp for both boxes.Plus the 26 = 56bhp bonus or there about.

Going along the lines of just 1 gear only. A home made centrifugal clutch and using some thing like a vans rear brake drum. will up date as and when.

Feel i need a bigger chlange as this would be.

Avatard · 09-21-2009, 03:12 PM

How about using a small diameter "Long-style" pressure plate clutch from a car, with lower rate coil springs and larger centrifugal weights? That might work- it's kind of how scooter slipper clutch works anyway. Obviously, a fork/throwout and cable/lever arrangement would allow a full disengage, and the preload on the pressure plate could be adjusted by replacing/cutting/shimming the coil springs, and the final lockup could be set by using larger/smaller centrifugal weight rollers.

defector · 09-21-2009, 03:16 PM

Larger trucks around here use a drum for the parking brake. Smaller than the actual brake drums (like 11 inches maybe?), and already have a provision to bolt a driveshaft to. Could fit the bill maybe?

Although I admit I have no clue what you are working on...

mutley · 09-21-2009, 03:28 PM

Quote:

Originally Posted by defector

Larger trucks around here use a drum for the parking brake. Smaller than the actual brake drums (like 11 inches maybe?), and already have a provision to bolt a driveshaft to. Could fit the bill maybe?

Although I admit I have no clue what you are working on...

sorry im doing a fun/race car project looking to get down too 900kg's / 450bhp but doing this saves loads more weight

Thats what im thinking and have one each side for each haftshaft could solve a problem later may be get it to act like a diff.

09-21-2009, 01:58 PM	#1
mutley Kneedragger Join Date: Sep 2009 Location: Didcot/oxford/england Posts: 117	Save weight dump the gear box Save weight dump the gear box As the project is about removing as much weight as possable. (No Gearbox) that's a lot for weight, including clutch, flywheel, gear stick assy, comes in at 65kg's 2 x = 130kg's . That would feel like an extra 26hp . Plus will also free up whp as no more gearbox losses, would end up giving back around 30hp for both boxes.Plus the 26 = 56bhp bonus or there about. Going along the lines of just 1 gear only. A home made centrifugal clutch and using some thing like a vans rear brake drum. will up date as and when. Feel i need a bigger chlange as this would be. __________________ If it works take it apart. if you dont need it get rig of ie. 5kg's = 1bhp or there about. They say Life is a waste of Time, and Time is a waste of Life....so let's all get wasted and have the time of our lives !! I've been dating this girl for a year and now the nagging starts.." I wanna know your name !" and things like that... :-( everyone has the right to be stupid.....I just abuse the privilege !

09-21-2009, 03:12 PM	#2
Avatard Crotch Rocket Curmudgeon Join Date: Nov 2008 Location: Here to integrity Moto: Li'l red baby Ninja Posts: 7,482	How about using a small diameter "Long-style" pressure plate clutch from a car, with lower rate coil springs and larger centrifugal weights? That might work- it's kind of how scooter slipper clutch works anyway. Obviously, a fork/throwout and cable/lever arrangement would allow a full disengage, and the preload on the pressure plate could be adjusted by replacing/cutting/shimming the coil springs, and the final lockup could be set by using larger/smaller centrifugal weight rollers. __________________ Insert free thought here.

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09-21-2009, 03:16 PM	#3
defector My balls, your chin Join Date: Nov 2008 Location: The desert of Az Moto: 929, SV650, YZ250 Posts: 1,917	Larger trucks around here use a drum for the parking brake. Smaller than the actual brake drums (like 11 inches maybe?), and already have a provision to bolt a driveshaft to. Could fit the bill maybe? Although I admit I have no clue what you are working on...