disc specifications

[street]

Morning all,

As part of NZ compliance checks I will need to provide factory data on disc thickness's and wear limits.

Anybody know what they are, I have a 71 +2.

thanks

[fatboyoz]

Hi Street,
Had a look at my Elan S4 Workshop Manual. Mentions disc diameter, no thickness specs. Assume that the Plus 2 Manual would be the same.
Here is a discussion concerning disc thicknesses. First link at top of page. Mention is made of minimum disc thickness being written on inner disc. Have never seen this myself.

https://www.google.com/search?q=lotus+e ... nt=gws-wiz

Also, if you look at this page from EBC, they list new thickness, and Minimum thickness.
https://ebcbrakesdirect.com/automotive/ ... -1971/5031

Cheers,
Colin.

Morning all,

As part of NZ compliance checks I will need to provide factory data on disc thickness's and wear limits.

Anybody know what they are, I have a 71 +2.

thanks

[Craven]

Our cars were built before discs became a sacrificial part of the disc brake system, (before asbestos ban) therefore I doubt if you will find a definitive or authoritative answer.

[joe7]

Most discs I've seen have the wear limit on the disc. On my Brembo discs the info is on the outer edge. On originals, I recall the wear limit was on the "unmachined" center part of the disk.

[oldelanman]

My S4 replacement front discs, obtained from one of the usual Lotus suppliers, were stamped on the edge .. the rears from the same source were not marked.

[Donels]

I cannot find anything in the workshop manual but there are dimensions quoted in Brian Bucklands book, see below.

[richardcox_lotus]

This is just about readable, I think it says min disc thickness, .325 inch to .230.

This photo was when they were removed. They are stored somewhere but not to hand just yet.

Regards
Richard