Landracing Forum
Tech Information => Technical Discussion => Topic started by: Jon on December 31, 2012, 07:20:35 AM
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Hi
After some info on Gear Vendor - Laycock P type overdrives.
After the following please:
Dimensions?
Weight?
How much torque can they handle?
Can you turn the around and use them as an underdrive? (Input shaft becomes output shaft and vice versa)
Can you turn the sprag clutch around and run them counterclockwise?
Can you up the pressure in them to prevent slippage at higher torque levels?
What is their maximum input shaft speed?
Is the J type much weaker and smaller?
Thanks
jon
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Jon I know one of the questions---they used to make a reverse rotation unit for drag boats---I have talked to Bob Jhonson (he is the President) about them.
I do not know what the pressures are to prevent slippage but one of the modifications to one of my units which has (Boneville Modifications) was to drill a larger by pass hole which makes it slower to respond when going back to direct---the so called split shiffting. This was done to limit pressures and paracitic losses.
I have never had any problems but I have only shfted at 8200. Due to the B'ville modification I have never been brave enought to "split-shift".
I would be supprised if there is any RPM limitication or modification for them to function a higher rpm.
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Thanks Sparky
Most of the answers other than counterclockwise rotation and using them to underdrive is here:
http://www.gearvendors.com/install.html
To run them counterclockwise I think would be a matter of installing an opposite hand sprag clutch, the rest looks omnidirectional.
Just worked out why the pump is piston, so it can run both ways, had me puzzled why you would run a piston pump rather than any rotational pump.
Thanks
jon