Lotus Elan

problem with brake disc clearance

PostPost by: wondo » Wed Jun 27, 2007 8:33 pm

hi,

i`m assembling my new spyder chassis and wishbones etc. at the moment, and i`m having a little problem with the brake discs hitting the lower wishbone and not sitting right in place in the brake caliper.

please take a look...


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DSC00255.jpg and
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PostPost by: Foxie » Thu Jun 28, 2007 4:41 pm

Is this on one side only ? If so measure up both sides to identify the problem. Then get on to Spyder.

I had to cut off and reweld the shock bracket on my Spyder rear hub. Obviously a Monday morning job.

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PostPost by: wondo » Thu Jun 28, 2007 5:11 pm

it`s exactly the same on both sides, that`s what makes me wonder if there is a problem with the hubs.
i could get rid of it by adding a washer under the brake disc, but i would like to solve it without fumbling around on an important part like the brakes...
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PostPost by: frearther » Thu Jun 28, 2007 5:29 pm

I swapped out my old (limited motion) style bushings for poly bushings, and this gave the rear suspension a much greater range of motion - so much so, that I had the same problem. I fabricated limit straps with wire rope and appropriate fittings. You may have to do the same. Id send you a picture if I knew how.
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PostPost by: elansprint71 » Fri Jul 13, 2007 2:33 pm

This is how mine looked when it went together; I suggest that you ring Spyder and speak with Wiggy.[/img] It's a Sprint but I guess the +2 has similar clearances.

Cheers,
Pete.
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PostPost by: gerrym » Fri Jul 13, 2007 3:55 pm

Wondo, I had exactly the same issue as you (disk brake touching wishbone on full droop.
I initially resolved the problem by shimming (washers) the disk further out from the hub), then checking fro run-out of the disk of course. I also had a very light touch between bottom of handbrake and wishbone (one side only - presumed tolerance build up).
My longer term solution may be to return coil-overs to Protech and get the travel reduced.

Query, does any one know what spring compressor can be used on the coilover units with 1.9ID springs
Gerry
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PostPost by: Jason1 » Sat Jul 21, 2007 5:10 pm

Hi Guys

I was pulling a few parts out of my shed and noticed the difference in thickness of these 2 discs. I bought these discs assembled on 2 rear struts second hand from the same 1973 +2.

This maybe the cause of the problem, maybe the new supply discs are just too thick??

Jason
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PostPost by: frearther » Sat Jul 21, 2007 5:50 pm

Gerry,

I assume you're referring to the rear springs, since the discussion has been about clearances in the rear. You don't need to use a spring compressor back there; jacking up the strut from the bottom of the hub (with suitable cushioning) will allow you to remove the castle nut. Then, slowly let the jack down, and the spring will decompress as the hob goes down.

Be sure that you jack up the car by the frame before you do this, of course.
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PostPost by: gerrym » Wed Jul 25, 2007 9:15 am

Art, discussion and photos have referring to Spyder RSC rear suspenion with coil overs not struts.
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PostPost by: frearther » Wed Jul 25, 2007 11:56 am

OOps! :oops:
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PostPost by: kneedham » Mon Apr 08, 2019 10:15 am

Rather late reply but I had the same issue whilst building the Spyder rear suspension.
I found that I had put the driveshaft side bearing in the housing the wrong way round. The bearing has a lip on the inner race that means the disc mount is nearer to the diff. Turn the bearing around, problem solved.
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