Talk Morgan Forums Morgan Sports Cars Classic Morgans (pre-CX) 2005 Roadster ride

I seem to recall that Bentley and RR leaf springs were "superfinished" by lapping the leaves together, or did I imagine that ?

I'm about to refit the original leaf springs to my Jaguar Special after having them reset. They're much better quality than the new ones I currently have fitted.

I intend to lubricate between the leaves and then wrap in Denso tape.

Lapping was the ultimate solution I believe. Interleaving was common in the sixties. A modern equivalent is available now and Simon (SiFab) sent me the link a while ago.

I have just seen this thread: Prior to setting of for Avignon I had been thinking about a fivelink suspension change but then had the thought that I might try raising rear tyre pressures to 25psi ( Avon shocks, a couple of small bags on board) and the change was remarkable. So there is something that is well worth trying and costs nothing.

I support the car on the rear frame and let the axle dangle when I lube my springs. The theory being that the tension comes off and the leaves open a little to let the lube in.

Adjustable progressive bump stops cured all my rear crashing suspension issues. Best mod ever on my Morgan.

How did you do it Roger?
Nick

Nick, others may disagree but I see the problem as one of contol, or lack of (assuming you have good quality springs). There is very little room for suspension movement on a trad and this is exasperated by the wide manufacturing tolerances between cars.  Peak suspension movement is not constrained as you would normaly expext on a normal system. Unfortunatly various body contact points are used to constrain the suspension instead. Can't think of too many other suspension systems that work like that!

I have installed a simple device for a few pounds that prevents this. It allows me to precisely control the movement of each spring and then the suspension works very well indeed IMO. I beleave it even improves matters by adding a bit of progressive spring rate at the end of the suspension travel too. You can feel the push back from the stops when you go into a hard corners somtimes. And that feels nice

I have posted details before so won't bore again but links to a couple of threads below. 

http://www.talkmorgan.com/ubbthreads.php/topics/460552/1

http://www.talkmorgan.com/ubbthreads.php/topics/440761/1

Thanks Roger, I'm going to have a go at your method.
Nick