PSpirine
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| posted on 22/1/11 at 05:04 PM |
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Suspension travel
How much suspension travel is there in a typical road-going locost? I'm looking for an approximate figure at the bottom balljoint (front) or
pivot bolt (rear).
Standard height to full droop
Standard height to full bump
I don't think my rocker setup is letting me get enough travel without some modification! Luckily all still in the design phase 
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Daddylonglegs
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| posted on 22/1/11 at 05:19 PM |
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IIRC it's around 3-4" full travel from bump to droop depending on spring rates.
JB
[Edited on 22/1/11 by Daddylonglegs]
It looks like the Midget is winning at the moment......
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PSpirine
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| posted on 22/1/11 at 05:20 PM |
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Only?
I've got around 110mm max (before things start hitting other things  ), approx 75mm of which is in compression, the rest in droop.
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Daddylonglegs
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| posted on 22/1/11 at 05:25 PM |
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I had a good chat with the guys I bought my shocks from and the chap I spoke to gave me some good sound info and between us we decided on the spring
rates and travel of the shock piston. If you have travel letting things hit each other then maybe you have got too much travel in your shock?
Someone with proper knowledge should be along soon.
[Edited on 22/1/11 by Daddylonglegs]
It looks like the Midget is winning at the moment......
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PSpirine
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| posted on 22/1/11 at 05:27 PM |
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Nothing to do with the shocks - The rocker hits a chassis tube if it goes beyond 75mm in compression. I'm either going to have to move the
chassis tube slightly, or alter the rocker.
I'm still in CAD stage with no springs.
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Daddylonglegs
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| posted on 22/1/11 at 06:05 PM |
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Oh! Hopefully a clever chap will be along soon
It looks like the Midget is winning at the moment......
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lucy
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| posted on 22/1/11 at 06:49 PM |
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Everything to do with shocks.
The shocks determine the potential max and min travel of the suspension. Too long a shock may mean the droop of the suspension hits the chassis or
bodywork and the opposite on rebound. short shocks mean very little travel.
If you require more ground clearance you may need to redesign the chassis or bodywork to give extra clearance.
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MikeRJ
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| posted on 22/1/11 at 07:01 PM |
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quote:
Originally posted by lucy
Everything to do with shocks.
Not really, any linkages between the shock and the suspension, or even mounting the shock at an angle will alter the available travel.
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lucy
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| posted on 22/1/11 at 08:17 PM |
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Yes, really.
The suspension mounts are fixed and the the length of the shocks are flexible. So you choose the length of the shocker to give you the desired ground
clearance and ride height. Without the shocker the only thing limiting the travel is the ground, bodywork or chassis. Unless of course you choose the
shocks and make everything else fit around it.
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MikeCapon
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| posted on 22/1/11 at 08:22 PM |
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A typical Locost has (should have) around 4" or 100mm of total travel, with 50 to 75% as compression (bump) and remainder as rebound (droop).
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johnH20
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| posted on 22/1/11 at 09:00 PM |
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Be very careful at the rear ( assuming RWD ) that you do not run out of droop travel. Will lead to all sorts of wheelspin and other handling woes . It
pays to be generous because there is no real way out. Bump you can mitigate with progressive rubbers to a degree but I don't think this works in
drrop.
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Angel Acevedo
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| posted on 24/1/11 at 11:32 PM |
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quote:
Originally posted by MikeCapon
A typical Locost has (should have) around 4" or 100mm of total travel, with 50 to 75% as compression (bump) and remainder as rebound (droop).
I did this approx,
1/3 is for droop, 2/3 for bump.
I have slightly more than 4" total Wheel travel.
HTH
Beware of what you wish.. for it may come true....
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