I'm sure I was told many years ago that the very best J types
(blueprinted) don't use the brake ring gaskets, which would certainly
reduce the distance the clutch has to travel.
John Kipping.
Terry and Cindy wrote:
>I have been fixing these units since new.
>
>The A & J are not really comparable and its not reasonable to make
>detailed technical comparisons. However, the A has an active accumulator
>which stores hydraulic pressure ready for use. The J does not, but
>replies on a high pressure pump to work on demand. Both use an identical
>sprag clutch to transmit the drive and allow over-run.
>
>The maximum torque values quoted by laycock are quite different, with
>the J type being superior. A modified J type, called the P type is still
>made and used as an aftermarket accessory on SUV's including the V8
>diesel.
>
>The best "racing" modification with both version is to reduce end floats
>so the cone clutch works with minimal travel. ON the J type this
>requires the typically damaged alloy clutch centre to be modified. If
>anyone wants more detailed info on modifying units, please email me
>direct.
>
>I use a much modified J type in all 3 of my Triumph race cars.
>
>Terry O'Beirne
|