dan8400
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| posted on 19/8/15 at 08:05 PM |
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Controlling rear suspension droop?
Hi everyone.
I am looking into fitting a diffuser to my Tiger Supercat but there is a problem. The rear axle (Sierra) seem to droop too much when I lift the car.
The trailing arms are slightly below the level of the rear chassis member (the place I would attach the front part of the diffuser)
I just wondered if there was a way I could stop the excess droop? It seems ok when it's on the ground but if I take off over a bump or jack the
car for any reason the trailing arms would bend or tear the diffuser
Thanks
Dan
[Edited on 19/8/15 by dan8400]
Hey - That's Journey!!!
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Talon Motorsport
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| posted on 19/8/15 at 08:54 PM |
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Do you have fabricated tubular wishbones on the back? I would remove a wheel and see if you could use one of those webbing tow straps slipped over the
end to restrict the drop, it won't rattle like a chain and if does'nt work they are cheap enough to try some thing else.
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dan8400
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| posted on 19/8/15 at 08:57 PM |
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No, the Supercat uses the whole Sierra rear suspension unit. Tube, diff, shafts, trailing arms - the lot.
I wasn't aware that I could use straps to resist the springs
Thanks
Dan
Hey - That's Journey!!!
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Sam_68
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| posted on 19/8/15 at 09:05 PM |
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Maximum suspension droop is normally controlled by the maximum (extended) length of the damper, so you could fit a damper with the same fully
compressed length, but a shorter stroke (hence shorter extended length).
In the olden days, people sometimes used to fit simple check-straps to swing axle suspensions to limit their droop, but it's a half-arsed
solution and not to be recommended.
If you don't know what you're doing, though, don't mess around with it: limiting droop can have dramatic effects when you run out
of suspension travel in roll whereas, to be perfectly blunt, fitting a diffuser to a roadgoing Seven will have about as much effect on performance
and handling as fluffy dice and go-faster stripes.
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dan8400
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| posted on 19/8/15 at 09:10 PM |
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Thanks for that Sam. I understand the diffuser is more of an aesthetic thing, but it will help with the so-called parachute effect of the rear tub. I
am changing the look of my car. Having removed the spare wheel and carrier all you seem to see is the diff. So a diffuser will at least hide that.
I could try some different shocks. I only need to find 25 - 30 mm. I can always refit my current shocks if new ones mess things up with handling
etc
Thanks
Dan
Hey - That's Journey!!!
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coozer
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| posted on 20/8/15 at 02:23 PM |
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A well designed diffuser is actually a lot more than purely aesthetic! They do make a positive difference.
1972 V8 Jago
1980 Z750
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dan8400
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| posted on 20/8/15 at 02:33 PM |
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I was hoping that too Coozer. Mind you, I'm no Adrian Newey!!
Thanks
Dan
Hey - That's Journey!!!
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