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suspension overhaul

Posted by 9146

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suspension overhaul #1
9146 rick dentel yardley, pa, USA 1970 Porsche 914 1978 MG MGB 2002 Mini Cooper	Posted: February 24, 2012 10:02PM Registered: 1 year ago Posts: 1,362

Looking to overhaul&lower my sons 78B. First off which bushings stock rubber,V8 rubber,poly,or prothane? He would also like to lower it 2". How about 1" dropped spindles and a lowering kit from Moss. What spring rates and length? The car will be used for pleasure and local trips (ok maybe a few long ones) some autocross etc. Not a daily driver. Thanks Rick

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Re: suspension overhaul #2
mac townsend Fairfield, CA, USA	Posted: February 24, 2012 10:07PM Registered: 7 years ago Posts: 18,096

I'd go with the urethane which ought to last longer than rubber (i.e. "V8" winking smiley

, as far as harshness, I've never ridden in a B that wasn't harsh. No suspension travel means harsh. s'way it is.

just remember to use that silicone grease they give you lavishly. And maybe buy another tube and use more. (you can use the leftover stuff in the electrical connectors to keep out water and crap, really needful there!) And don't tighten things until it is back on the ground and rolled around for awhile to get things settled.

1973 Roadster. A nice 50-footer!
SUs, Datsun 5-speed
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Re: suspension overhaul #3
TomBrooksuk Tom Brooks Leicester, Leicestershire, United Kingdom 1967 MG MGB GT	Posted: February 25, 2012 04:26AM Registered: 2 years ago Posts: 604

Hi heres what fitted to our 1976 mgb gt road car before converting it to a FP race car,

Urethane brushes all road (red MGOC)
Moss race 680lb froint springs (the spring rate was fine for the road but they were too short so we fitted 2x moss spring spacers each side)
7/8th front anti-roll bar
standard rear anti-roll bar
standard rear springs with lowering blocks
25% uprated dampers all round

This worked really well on the road and wasnt too harsh, however "spirited" driving did highlight the issues with lowering a RB MGB

The problem is lowering a RB MGB especially the front changes the geometry in particular the bump steer. This is fine for normal driving as mentioned above.

There are ways around this which i would be happy to discuss if you were keen but it is more involved.

Hope this is helpful

Tom

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Re: suspension overhaul #4
rundjk David Kinsey Virginia Beach, USA 1980 MG MGB "Runaway"	Posted: February 25, 2012 07:30PM Registered: 3 years ago Posts: 1,476

x2 what the other guys said, but I will add that I would advise against lowering 2". I found a 1" lowering was great, did not create really big bump steer problems and only the occasional light scrape on a speed bump (military bases seem to have rather tall speed bumps). If it was lowered 2" I think you'd experience many, many scraping issues and maybe even some tire rub issues.

David

David J. Kinsey
Virginia Beach
Tidewater MG Classics
1980 MGB "Runaway"

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