Enbloc
Part of things
Posts: 353
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Looking for a company that can make me a one off anti-roll bar. It’s around 24mm at the moment but looking to have it copied at around 28mm. I’ve tried springcoil.co.uk but they can’t do anything over 24mm. ☹️ It’s a fairly simple thing that I could make myself in the correct steel so even a company that can heat treat may help.  |
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How about an early Land rover 90 tdi defender front arb. they are from memory over 25mm but are available heavy (thicker) duty. I have cut and welded to reduce width with success. Also cheap. Or how about clamping two together?
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Why do you want such a drastic increase in bar stiffness?
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stealthstylz
Club Retro Rides Member
Posts: 14,832
Club RR Member Number: 174
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Custom Anti-Roll Bar.stealthstylz
@stealthstylz
Club Retro Rides Member 174
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No room to shift the outer mounting points to effectively shorten the cantilever?
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Enbloc
Part of things
Posts: 353
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Fairly certain, yes. I don’t think it’s double in reality. I went from a 1” to a 1 1/8” bar on my Falcon and it was a great improvement. Or how about clamping two together? I thought about it but I think it would be a tad excessive as it would be the equivalent of a 2” bar? Why do you want such a drastic increase in bar stiffness? The car suffers from a high centre of gravity so has alot of body roll. It’s loose at the back as it stands so I can afford to add in some understeer with a thicker front bar. I run a Falcon which is similar, V8, rwd, live rear axle, leaf springs and I have a 1 1/8” bar which works well. No room to shift the outer mounting points to effectively shorten the cantilever? Yes, in theory. I think it would be difficult to return back to original if it was unsuccessful? Something to look into. |
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Last Edit: Feb 9, 2023 3:48:50 GMT by Enbloc
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Feb 13, 2023 10:02:36 GMT
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Assuming the same overall shape, the increase in stiffness due to the diameter is simple to calculate:
(NewOD/OldOD)^4
Going from 24mm to 28mm gives 1.85 times as stiff. Which is a big increase as others have said. Getting one custom made then finding out it is unusable seems like a big risk.
Considering the simplicity of the shape and the chassis layout, (no need to weave around engine parts, etc) I'd be tempted to adapt something off a transit van or pickup (hilux, ranger, navara, etc). They often have bars of similar dimensions and diameters. Scrap yard and a tape measure?
There are a number of vehicles with torsion bar suspension that might provide something suitable too. A torsion bar is a torsion bar. VW beetle, various French hatchbacks, some pickups again (longitudinally mostly).
Or, since you are likely to need to experiment anyway, just made some sliding clamps for the exsisting bar, like stealthstylz says you can then adjust the arms shorter to make it stiffer.
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Feb 13, 2023 13:12:39 GMT
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biggest ARB/torsion bar style you'll find in a french car is 24mm.
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Have you considered droop limiters?
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