Talk Morgan Forums Morgan Sports Cars Maintenance & Servicing Workshop Note - Bump Stop assists

Yes indeed, I was talking about the rear leaf spring setup. Your comments on coils are interesting, I always thought that coil suspension, especially rising rate systems used coil binding as part of the design to control the spring rate on bump. That's my understanding of how the SSL suspension is designed

Given the factory profile of the inner wing cut out it is either the edge of the plywood or the bump stops that limits upward travel. I’ll go with the bump stops thanks.

That's interesting, have they changed the profile of the cutout? It always used to be the diff hitting the rear hoop that limited travel, hence the rubber pad on the hoop. Prior to the introduction of the telescopic rear dampers It was the Armstrongs that did the control - at least on my 1986 car. The rear axle can't get anywhere near the inner wing panels.

It does indeed play an important part of rate change on the SSL rears. I was refering to total coil bind though forming a suspension travel compression limit.

As an aside I'm amused how our modern Mini makes quite alarming almost metallic clonks on full rebound from the otherwise quiet, relatively firm and highly compliant suspension when the Mog over the worst of Norfolks potholes doesn't, courtesy of rebound springs. I guess coping with such extremes is beyond BMW's brief since they wouldn't be tolerated in Germany

There’s a mention of this on the SSL website advising altering the inner profile if I recall correctly. On my 2018 car the factory cut out is still sloping upwards directly above the axle and the high point of the profile is not directly above. Sorry, struggling to explain without sketching, but, it is as though the axle has been relocated slightly at some time but the profile not changed to match. I had witness marks on the plywood on the sloping part of the cut out.

Thanks for advice, will check that next time rear wheels are off.

This is one of the great things about Morgans, you learn how they change as the years go by. Even if they look essentially the same on the outside, there are all sorts of little changes under the skin, which is why DaveW's book is so helpful.

Here's how my rear axle is aligned. Not a perfect photograph by any stretch, but you can clearly see how the axle is aligned with the centre of the dip in the chassis and the centre of the cutout in the plywood. Are the later axles located further forward, or does the axle swing through a tighter radius maybe?

This is the pic your looking for Harry

Yes, thanks ... I’m still trying to work out how to post my photos!

Here we are, I think but with “after” first and “before” below!