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Ben Lipman
Goo Roo
SA
Soarer TT manual, plus TT track car, plus a spare shell

Posts: 3778
Reg: 04-2006

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Tuesday, July 15, 2014 - 11:02 pm, by:  Ben Lipman (Ben12a)


Andrew McKellar wrote on Tuesday, July 15, 2014 - 05:09 am:

And if all that fails you could always just drive faster...



I don't need to be faster to make a giant leap forwards, just more consistent. In any one of those sessions when we were testing I should have run a 1:07 if I put 10 good corners together.

Since the last post I have had the car up on stands again. I zeroed all the springs and shocks and re set them to be exactly the same left to right. Every detail was measured, spring seat, preload (2mm) spring length captive, spring length loaded, spring perch and shock body length. When it was all put back together the ride height was a lot closer to dead level, with only 1mm discrepancy at the rear.

I then did an alignment, now running 4mm toe in at the rear to try taming the oversteer, and reducing front toe out to virtually nothing (0.6mm total). Camber, castor remain the same.

I

Michael McKellar wrote on Tuesday, July 15, 2014 - 09:07 pm:

Also make a note of how many turns of the adjusters result in how many mm of ride height



I did this for toe and ride height, at the front and rear. I haven't figured out the effect of lengthening or shortening the traction rod on handling, so haven't measured a 'turn' yet.

All I need to do now is adjust the ride height so it is level with me on board.

I am borrowing a set of corner weight scales soon, so will finally get an accurate weight for the car. I will also see what the corner weights are, and maybe be able to make some adjustments to get that even too.

Not exactly exciting work...could post pics of rulers, strings and callipers, but wont.

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