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      01-16-2013, 08:29 PM   #15
gazz
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Drives: The horse I fell off
Join Date: Apr 2007
Location: Gold Coast Australia

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I'm looking at suspension changes at present. Had a lengthy discussion with Beric Lynton's race car builder yesterday about my options.
BTW they are now fielding two cars for the 12 hour race. The second will be a 135 coverted to a 1M including all the bodywork, chassis changes etc.

At present I have Eibach sportline springs on the car but it needs different shocks as it is quite skittish over stutter bumps and the like. I will probably be changing the car back to stock springs then looking for a kit to change to.

As Skycat says, "There is a BLACK ART to this".

Some thing I hadn't thought of is - when altering the ride height the roll centre can be affected. I.e the static roll centre can go from above a pivot point to below. Dynamically though, the altered roll centre can move above the pivot point and cause a drastic change to the car's behaviour. Eg. think of heavy braking into a downhill corner with the front end roll centre below the pivot point and the light rear end above the pivot point. A nice recipe for snap oversteer, something the car is already prone to.

I do not any special have suspension knowledge, I am just passing on some info as I interpreted it as of yesterday. Plus, some things make logical sense.

He suggested a kit which has compression damping as well as rebound. Then play with sway bars to dial in the handling trait you want. I.e. understeer, oversteer or neutral. It's all very well saying you want throttle adjustable oversteer but are you good enough? I used to think I was good enough having raced a bit ( albeit on bikes )
but these days I'm looking for a little more margin for error so I will perhaps be aiming for neutral to understeer.

Beric's race car has a race KW kit fitted which was set up at the factory. They have done a fair amount of track development and are surprised at just how good the factory setting is.
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