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Post by Deleted on Feb 8, 2011 19:33:51 GMT
Hi All, spent the day having advanced driving and skid lessons today, and interestingly my instructor has a race MX5 and does a lot of suspension setting and testing for some big brand shock producers. he made comments to flo flex bushes and the manufacturers guideline are that copper grease should be used in massive ammounts to avoid binding. binding will result in the bushes disintegrating or failing, and that they should be installed and bolts torqued with the car in its road going position (under its own weight, no jacks or stands) as torquing with the car off the ground (suspension fully extended) will result in unneccesary torsion on the bushes. will he also commented that the reduced weight, stiffer bushes and stiffer lowering springs we all seem to be going for may have advers effects on the handling. he went on to say that due to the reduced weight the mx5 will nose down at the front and lift at the rear during braking thus making a dodgy light rear under heavy breaking. he commented the ideal set up is to have the rear 10mm lover than the front. I've invited him to bristol for the day to help set up mine, he said ideal world, go with fully adjustable shocks. so will add more details as they come.
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Post by Deleted on Feb 8, 2011 19:34:58 GMT
PS an comments for you stiggy? as i believe yours is pretty standard?
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Post by Kevin Patrick on Feb 8, 2011 20:55:41 GMT
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Post by Stiggy on Feb 9, 2011 19:18:40 GMT
Interesting comments there Alex, my advise would be to finish the car and run it to see how it feels. Lots of people have different opinions on set up and the world is full of experts so I would say you should get help if it's on offer but do not treat it as gospel. Removing weight from the car is unlikely to change the polar moment of inertia. The weight is reduced uniformly in the Exocet which results in the nose dive being reduced in fact. The tank in Exocet is pushed 300mm further back than in a standard MX5 which helps achieve a perfect 50/50 balance when a 90kg driver is sat in. Fully adjustable shocks are a great idea if you wish to have a play and get the car to a track that is nice and tight. You will soon get fed up with the hard "track" ride though so a quick tweek on the adjustable dampers is cool. Attachments:
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Post by pauljudge on Feb 10, 2011 8:14:11 GMT
You are absolutely right stiggy in my opinion there are to many " rivet counters " and not many people just wanting to have some fun.
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Post by Deleted on Feb 10, 2011 11:29:54 GMT
Stiggy, thats good thanks, as wasnt aware of the weight distribution etc. I think my 'experts' claims were more aimed at people going for a very stiff track set up, which would be unsafe for the more bumpy roads. Im still going to run with flo flex bushes, standard shocks and 30mm lower springs. Im also bang on 90KG so no passengers for me!! Paul, your right, and mine will be almost purely road use for fun. Just thought id drop it in for discussion as we all seem to be choosing slightly different set ups.
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Post by Stiggy on Feb 10, 2011 11:59:28 GMT
Best thing to do in my experience is listen to everyone then make your own mind up. Alex, your man has obviously got knoledge as it is correct with all one piece bushes to clamp the crush tube when at normal ride height. Stiggy
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