pk
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| posted on 7/6/06 at 12:24 PM |
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Stability / Handling
I lost the original - so here we go again!
My Blade engined, book car seems to be unstable at speeds of over 60 mph. It’s got the book caster – all of it, 5.5 degrees I seem to recal, a live
axle and a quick rack fitted.
It tends to get into a bit of a “tank slapper” that feels like it could be the rear tyre side walls flexing / moving around, but I note from an
earlier thread that the caster angle seems to be the usual suspect.
So what’s the consensus for caster angle and are there any other areas that I should look at?
The corner weights are all OK
The tyre pressures are all at 20psi.
I have between 2 to 4 mm of toe in.
Bump steer is very very small if any at all – special steering rack.
It's on straights that it seems to be moving around, bends are OK.
Any ideas? How stable should it be?
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iank
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| posted on 7/6/06 at 12:30 PM |
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It's over in 'Locost Related'
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nitram38
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| posted on 7/6/06 at 01:16 PM |
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I still would suspect rear wheel toe-in or rather the lack of.
You need to get the car suspension measured properly.
A small tweek here and there will make a big difference.
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SeaBass
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| posted on 7/6/06 at 02:35 PM |
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quote:
Originally posted by nitram38
I still would suspect rear wheel toe-in or rather the lack of.
Aye - but pretty difficult to adjust on a live axle... lol
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nitram38
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| posted on 7/6/06 at 05:36 PM |
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quote:
Originally posted by SeaBass
quote:
Originally posted by nitram38
I still would suspect rear wheel toe-in or rather the lack of.
Aye - but pretty difficult to adjust on a live axle... lol
It could still be bent
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SeaBass
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| posted on 7/6/06 at 05:51 PM |
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quote:
Originally posted by nitram38
quote:
Originally posted by SeaBass
quote:
Originally posted by nitram38
I still would suspect rear wheel toe-in or rather the lack of.
Aye - but pretty difficult to adjust on a live axle... lol
It could still be bent
Let's not bring sexual orientation into this...
Live axle cars do have a certain amount of 'jitter' to them when they are as light as a seven. You can really feel the weight transfer
lighten up the front wheels when blasting up hills round here.
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David Jenkins
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| posted on 7/6/06 at 07:43 PM |
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quote:
Originally posted by SeaBass
Live axle cars do have a certain amount of 'jitter' to them when they are as light as a seven. You can really feel the weight transfer
lighten up the front wheels when blasting up hills round here.
Great, isn't it! 
David
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