British-Cars.org

Welcome to the DMR Site for British Car Information.

Recommendations

Parts

MG parts spares and accessories are available for MG T Series (TA, MG TB, MG TC, MG TD, MG TF), Magnette, MGA, Twin cam, MGB, MGBGT, MGC, MGC GT, MG Midget, Sprite and other MG models from British car spares company LBCarCo.

MG MGB Technical - Rear Bump Stop


What is the nomimal distance between the rear bump stop and the pedistal say with a half tank of fuel?

Many thanks, Trevor B.
t burnett

Given the weight of the car, and dare I say many occupants these days, the effect of fuel will be pretty minimal at about 2% or less. At half loading the springs should be nearly flat, and be about mid-way between bump-stop and rebound strap. However many springs these days seem to be much harder than that, possibly to account for much heavier occupants, so much so that people talk about having to load up the boot of an otherwise fully equipped car in order to get the straps fitted. The normal way of measuring ride-height is the distance from the middle of the hub to the bottom of the trim strip, which as you can see from the scatter graph here varies wildly in practice, but is typically around 14" for a chrome bumper and 15" for a rubber. Suspension movement *should* be much the same for both, as they have different damper drop-links, rebound straps and bump-rubber pedestals.
PaulH Solihull


All I wanted was a distance/measurement for comparison!
t burnett

Just checked my '79 BGT. Rubber bumpers, standard suspension (recently fitted 3rd set of rear springs). Fuel tank half full.

Bump stop to pedestal: RH 78mm, LH 93mm
Centre of rear wheel to lower edge of chrome strip: RH 396mm, LH 420mm.

The RH (driver) side has always been lower, perhaps because the passenger side is normally unoccupied.

Brian Shaw

This thread was discussed between 12/12/2011 and 13/12/2011

MG MGB Technical index

This thread is from the archives. Join this live forum now