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An 18 month Mod, finally done, sort of!


JOCKER

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So I purchased my latest mod some 18 months ago and for one reason or other I never had it fitted. I tried to fit it 6 weeks ago but found I needed some parts from Westfield to install it so after countless phone calls and in the end a trip to the factory to ensure I got the parts I finally fitted it today. Big thanks to Westie66 and Steve Farrimond for their help doing this. Much appreciated  :t-up:

 

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And here is it the 18 month mod!

 

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But unfortunately I can't drive the car with it fitted (shame was looking forward to the extra downforce  :oops: ). Reason being is that I can't get the right ride height in the car (it currently sits 50mm too high at the rear) which means when I hit a bump or fly over a bump the wishbones would smash the diffuser.

 

If I adjust the shocks to achieve the right height by adjusting the collars (as it was when it was GEO'd - I was told this was acceptable) the rear springs are loose between the collars when driving. Not only is it noisy but when the the shocks compress they are not possibly seating in the collars so in effect I have no damping and it used to hurt when you hit a bump!. Any suggestions? Shorter springs? I have protech with 9"springs.

 

Anyway, while I was at it a new set of Playskool belts. Hopefully I can pick up some new seats at Stoneleigh.

 

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I would go with what you have already and leave them loose on full droop. That's how I run and its given no issues, just need to manually make sure the spring is seated properly after the car has been jacked sometimes, that's all.

What's the thinking behind the shorter springs?

If the car is bottoming out hard on bumps then maybe you could do with harder springs, more ride height or some better bump stops.

You'd think the diffuser should have been designed to clear the wishbones in droop though... Might have to get handy with the hacksaw / angry grinder / etc?

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Have you seen those assister springs which just take up any slack and keep a little tension on.

 

Bob :d

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I have a fibre glass diffuser that has two recesses/depressions each side that can take about 25mm of additional droop from the lower wishbones.

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Yeah mine has the recesses as per the site, and fits ok when stationary with about a 1cm to spare between the wishbone Martin.

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  • 2 weeks later...

If you are keen to run the diffuser on the road, then it may be that the shocks are too long, not the springs. 

If the wishbones hit the diffuser on full droop, a shorter damper will stop this happening.  If you get shorter dampers, just be careful that there is enough travel to get the ride quality you want without the dampers hitting the bump stops. Its a fine line, but others (including Martin) have managed it.

 

I wouldn't run the springs so low as in droop you could risk the collet escaping and the spring being divorced from the damper. Use helper springs to prevent this. I have seen accidents at Cadwell due to this very occurrence.

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