scootz
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| posted on 20/8/16 at 02:11 PM |
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Changing Wishbone Geomtetry
So you have a chassis and the wheelbase is 3cm too long for the bodywork you want to use. The front-end is ok, so any mods are going to happen at the
rear.
It's a full bodied car, so lengthening the bodywork is out.
You also can't shift the rear suspension mounts.
That leaves changing the rear wishbone geometry to reduce the wheelbase. I know the square route of bugger all about geo, so is this a workeable
solution, or is it a sure-fire way of completely screwing-up the rear suspension?
It's Evolution Baby!
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mark chandler
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| posted on 20/8/16 at 04:01 PM |
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Well within the tolerance of the cv joints, the pivot points remain the same.
Analogy time
Look at locost fronts, even length, then look at some other types with the front bone at right angles and the rear 45 degrees.
Only concern then is the shock will now lean a bit, can you modify the brackets to put back in line?
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Sam_68
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| posted on 20/8/16 at 05:23 PM |
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quote:
Originally posted by scootz... is this a workeable solution?
Short answer: yes absolutely.
It will change the handling of the car slightly, of course, but in a fairly easily predictable way, which is why some old F1 cars were designed to do
exactly this to suit different circuits.
If you can alter the 'sweep' of the wishbones without running into tangles between driveshafts, dampers, etc., then it's pretty
straightforward.
I know you said the changes are at the rear, but worth noting that you'd have to be more careful at the front, since if the fore-aft
relationship between the uprights and the rack changes, you'll be altering the Ackermann geometry.
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scootz
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| posted on 20/8/16 at 06:02 PM |
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Thanks for the replies guys!
It's Evolution Baby!
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Neville Jones
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| posted on 27/8/16 at 09:12 AM |
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Hi Scot,
What sort of car is it, to start with?
You might not be able to change the body length, but cutting the arches, moving them, and glassing/filling in between, then fairing it up and painting
would save a lot of headaches and maybe cause a few more? 
Cheers,
Nev.
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