alfas
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| posted on 15/5/15 at 04:39 PM |
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locost on track: 1 rear wheel in the air during cornering resulting in slipping drive
whats the best way to cure a slipping drive, because 1 rear wheel is in the air when cornering on track?
what should i improve first, before installing a LSD? (if a LSD would cure the problem at all)
locost, 5-link live axle, 1600 x/flow-engine. the problem was less with the less powerfull 1300 engine
it has improved after i set the front dampers harder, means the car is diving less in the corners
would longer rear dampers help too? getting more positive travel of the axle.
[Edited on 15/5/15 by alfas]
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theduck
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| posted on 15/5/15 at 05:08 PM |
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If it is tri-podding then wouldnt adding an antiroll bar help?
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britishtrident
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| posted on 15/5/15 at 05:47 PM |
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Stiffen the front in roll, if this results excess understeer then you need to look at suspension travel and roll centres.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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JoelP
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| posted on 15/5/15 at 05:48 PM |
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Check the rear isn't binding. More likely though is front springs too soft/ rear too hard. With that in mind I'd recommend a full
suspension set up. An antiroll bar shouldn't be needed.
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MikeRJ
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| posted on 15/5/15 at 05:52 PM |
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quote:
Originally posted by britishtrident
Stiffen the front in roll, if this results excess understeer then you need to look at suspension travel and roll centres.
Rear spring rates could also be too high and/or limited articulation of the rear suspension in droop.
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britishtrident
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| posted on 16/5/15 at 07:51 AM |
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I should add don't make the front dampers stiffer it won't solve the problem, it isn't a damper setting issue unless the rear
dampers are much too hard in rebound.
The problem is a combination of the roll couple distribution and limited rear suspension travel, when cornering the front inside tyre is taking the
weight that should be shared with rear inside tyre.
Roll couple distribution is a fancy term for how much the suspension at each end of the car contributes to resisting roll.
The roll resistance of a front or rear suspension is mainly determined by by the spring rate at the wheel , anti-roll bar stiffness, and the roll
centre height.
On a lot of Locost style cars the front roll centre is a bit too low but that can be compensated for by stiffening either by harder front springs or
fitting a skinny anti-roll bar.
Is the car oversteering or understeering ?
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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alfas
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| posted on 16/5/15 at 08:03 AM |
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the car has indeed no ARB´s fitted.
the car has been corner weighted and setted from the former owner
the rear of the car is rather soft. not as soft as i´m used from sylva´s, but not far away.
definately much softer than the usual oldschool westfield se.
the coil-overs are avo´s , damper rate is by single adjustment.
unfortunately i have no data about the coil-rates.
how much positive travel (rebound) should i have at the rear?
or lets ask different: if i jack-up the car how many mm should the dampers move until the wheel is lifting from the floor?
car rather tends to oversteer
[Edited on 16/5/15 by alfas]
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alfas
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| posted on 21/5/15 at 09:15 PM |
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No ideas??
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