Phil, great work and thank you for an excellent go at documenting the progress and your findings. At the risk of asking the obvious, have you reached-out to anyone at Centa or MMC to discuss your work? I would think Centa would have a vested interest in the inserts and may be able to render an informed opinion as to relative merits of your revisions. As mph noted, the changes to the "shock absorbing property of the Centa coupling" may be of concern to the rest of the drive train, or not.
If your new poly blocks effectively reduce the Centa cushion action, what problems does this actually cause down-stream? If it was just eliminated entirely, what would happen? I could "imagine" accelerated wear in the trans splines due to the irregular power pulses, bearing failure perhaps, or maybe no real problems as the trans is robust enough to handle it? Perhaps this has been discussed before, if so, sorry for re-hashing it.
Hi truckin on, thanks for your nice comments.
I have contacted Centa who say the coupling is a tied to Morgan part and so can not discuss it with me. I have sent several mails to people at MMC but never had any reply.
My new inserts do not reduce the cushioning but do reduce free play, there was about 20 degrees of movement achieved with light finger tip pressure this is now about 5 degrees.
I have tweaked the inserts to achieve minimum shock and vibration as felt by me sitting in the machine and must assume that I have therefore minimised the shocks felt by the transmission components at the same time.
