Rear anti-roll bar upside down?

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Re: Rear anti-roll bar upside down?

Post by ronnie » Sun Oct 23, 2016 3:30 pm

Look at the angle of that rollbar with the short link
Now look at the angle of the 4 bars.

Fit the longer link.



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Re: Rear anti-roll bar upside down?

Post by Will Anderson » Sun Oct 23, 2016 3:36 pm

MB14 and MB46 are similar mileage 190+k and the arb looks the same so far as I can see.

One other thought to ponder. Would the height/wear on the suspension, mostly the rear shock/spring assembly result in the bending of these links? I am thinking maybe if the springs/dampers are worn then that would affect the geometery sufficiently to alter the expected forces acting on the links.

If Harvey Bailey were brought in to set this up for Middlebridge then I would be surprised if they got it so wrong and, a bit like the old "all scimitars overheat" myth, maybe it is down to other factors?

Or maybe I am talking rubbish!! :D


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Re: Rear anti-roll bar upside down?

Post by ronnie » Sun Oct 23, 2016 4:04 pm

Side Elevation of the 4 bar links movement thro' its suspension travel and the arc of the rollbar from its pivot would suggest summit ain't right with the short links.
Something is going to give/bend.



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Re: Rear anti-roll bar upside down?

Post by simmit » Sun Oct 23, 2016 9:01 pm

Will Anderson wrote:MB14 and MB46 are similar mileage 190+k and the arb looks the same so far as I can see.

"If Harvey Bailey were brought in to set this up for Middlebridge then I would be surprised if they got it so wrong and, a bit like the old "all scimitars overheat" myth, maybe it is down to other factors?"

But ................. Did Harvey specify the long link or the short link? If he specified the long one yet Middlebridge later on changed to a short link for whatever reason and not realise the length is important then the problem may only affect later models.



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Re: Rear anti-roll bar upside down?

Post by Roger Pennington » Sun Oct 23, 2016 9:19 pm

The longer link in Will's photos looks very low - lower even than the exhaust - so they may have found it was too vulnerable? It doesn't look as though it would need to be as short as the short one, though, just to ensure it doesn't stick below the chassis?


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Re: Rear anti-roll bar upside down?

Post by Will Anderson » Sun Oct 23, 2016 9:29 pm

And the parts catalogue isn't entirely clear on that either.
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Last edited by Will Anderson on Mon Jul 03, 2017 10:16 pm, edited 1 time in total.


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Re: Rear anti-roll bar upside down?

Post by simmit » Sun Oct 23, 2016 10:18 pm

Roger Pennington wrote:The longer link in Will's photos looks very low - lower even than the exhaust - so they may have found it was too vulnerable? It doesn't look as though it would need to be as short as the short one, though, just to ensure it doesn't stick below the chassis?
Good point and it does look as though end of the MB14 ARB may have had a clout at some time.

Unfortunately, any shortening at all of the long link is taking us back to the problem. Can we devise a better arrangement?

For what it costs I'm thinking of trying Corkys suggestion:- "The longer link looks like the SS1/Chevette/GM one. Used on lots of cars and available from around £12 a pair. They're easy to shorten if need be." If I do give it a try then I'll fit the centre bolts t'other way up (bolt heads to the bottom and free thread at the top) which should give another inch or so ground clearance.



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Re: Rear anti-roll bar upside down?

Post by scimjim » Sun Oct 23, 2016 10:36 pm

Does the Middlebridge still have the Watts linkage? If so, the simplest fix would be to remove the ARB. A solid 5 link rear axle on a road car doesn't need it.

When Middlebridge asked Club members for ideas on how to improve the GTE, the rear ARB wasn't on that list (and that included competitors).

GW offered a retro fit kit but it didn't sell well.
Last edited by scimjim on Sun Oct 23, 2016 11:29 pm, edited 1 time in total.


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Re: Rear anti-roll bar upside down?

Post by Will Anderson » Sun Oct 23, 2016 11:05 pm

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Last edited by Will Anderson on Mon Jul 03, 2017 10:16 pm, edited 1 time in total.


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Re: Rear anti-roll bar upside down?

Post by Roger Pennington » Sun Oct 23, 2016 11:43 pm

Yes, I'd agree, even in a worst-case scenario involving complete breakage of a link, the car is only going to revert back to being just like every other GTE/C on the road - and they seem to get along fine, without a rear ARB?


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Re: Rear anti-roll bar upside down?

Post by philhoward » Mon Oct 24, 2016 4:14 am

I do recall GEnMan fitting a rear ARB to his 6b and he reported an improvement in high speed handling.


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Re: Rear anti-roll bar upside down?

Post by simmit » Mon Oct 24, 2016 8:33 am

scimjim wrote:Does the Middlebridge still have the Watts linkage? If so, the simplest fix would be to remove the ARB. A solid 5 link rear axle on a road car doesn't need it.

When Middlebridge asked Club members for ideas on how to improve the GTE, the rear ARB wasn't on that list (and that included competitors).

GW offered a retro fit kit but it didn't sell well.
Good suggestion and I would be happy to remove the ARB but for one thing .................... insurance! In the event of an accident if Insurer discovered the manufacturers suspension had been substantially altered then I suspect you'd be on your own.



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Re: Rear anti-roll bar upside down?

Post by peter freeman » Mon Oct 24, 2016 8:34 am

I did suggest to my MOT man that I could just take it off and revert the car to as was originally but he said that the car was built with it on so it should be retained - another "grey" area as MOT details tend to be.



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Re: Rear anti-roll bar upside down?

Post by petermisy » Mon Oct 24, 2016 8:49 am

One of my GTC's has an anti-roll bar, can definitely notice the difference when driving one after the other.


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Re: Rear anti-roll bar upside down?

Post by greeny » Mon Oct 24, 2016 9:11 am

petermisy wrote:One of my GTC's has an anti-roll bar, can definitely notice the difference when driving one after the other.
Could some of that not be shocks Peter?


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