Rear Disc Brake kits for TC, who makes them?

[Grumblebuns]

there is a pdf file on the yahoo group, under tcs Miata conversion.
No, don't have any drawings of my own. Since I'm changing out the stub axles and hubs, I've purchased a large hunk of steel, and will be making another set on a manual mill and lathe. I foresee a bit of time in front of the mill...
The write-up for the Miata conversion that I am following is by Doug Alexander, but I cannot seem to find it to link to.

I saved Doug Alexander's writeup on the Miata conversion, PDF link attached.

The  last person to offer a front and rear caliper conversion was Dave Lindemann back in 2006-2007 time frame. I got both of his front and rear brackets for the TCS. Search the Knowledgebase under Dlindemann (author) and his project starts with message #59891, subject "Wilwood Front Caliper Brackets - Any Interest?". It's pretty interesting reading on his struggles with cost and use of material (aluminum vs steel).

I also discovered another rear disc conversion I had forgotten about crated by Norm Vandal back in the early 2000s. I have forgotten which calipers and rotors he designed his system for.

I don't want to cut anyone's current project off at the knees but if someone is in a real big hurry to get his rear disc conversion going and is willing to take on the project, contact me and I'll send you Dave Lindemanns email. It's possible he can give you the drawings to help you create you own brackets and his experience.

[Grumblebuns]

More pics

[Grumblebuns]

Here is Doug Alexander's Miata disc conversion article

https://www.dropbox.com/s/y0i32zio5qnbe86/DAlexander%20Rear%20Disc%20Conversion.pdf?dl=0

[BDA]

Dropbox is asking me to login, Joji.

[Grumblebuns]

Hey BDA, let me work on it. The article is too large to attach so I decided to use Drop box. More aggravations.

Edit: OK, I changed the link, let me know if it works

Edit 2: added a drawing found for the Miata rear bracket, source unknown.

[BDA]

That fixed it! Thanks!

[surfguitar58]

Would 10" rotors fit a stock TCS alloy wheel? If so, how about these with build in e-brake? https://www.flyinmiata.com/flyin-miata-four-piston-rear-brake-upgrade.html

[Grumblebuns]

The narrowest section inside the TCS alloy wheels is around 10.75" so the 10" rotors will fit but is there enough room for the calipers? The website has supplies a template you can use to see if their  brake upgrade will fit in the 13" wheels.
 

[Grumblebuns]

Found a drawing of the Miata bracket again source unknown.

[andy harwood]

Following the file Grumblebuns uploaded for the bracket, it's attributed to oldarmyarchitect on the yahoo site.
The bracket photo was made by that drawing, except rotated to the 12 o'clock position.
2nd pic - caliper & rotor, rotor cut to 9.5" diameter
Other pics show caliper/wheel clearance
Appeared about 1/4" clearance from outer rim, didn't measure to the backside, but was clear.

[andy harwood]

This is the first time I have assembled these parts to see if everything fits inside a 13" wheel. I have some aluminum spacers in the upright, so cannot tighten axle tight, and still rotate wheel.
I loosened the axle nut up enough to rotate wheel, and the caliper was rubbing a bit. So I installed the brake bracket that I made, everything fits without interference.
Took another pic, the clearance is better....

[LotusJoe]

Hey BDA, let me work on it. The article is too large to attach so I decided to use Drop box. More aggravations.

Edit: OK, I changed the link, let me know if it works

Edit 2: added a drawing found for the Miata rear bracket, source unknown.

I have added the PDF to this thread.

[LotusJoe]

Here is Doug Alexander's Miata disc conversion article

https://www.dropbox.com/s/y0i32zio5qnbe86/DAlexander%20Rear%20Disc%20Conversion.pdf?dl=0

The PDF file has been added as an attachment to this post.

[BDA]

Hey Joe, how about adding Doug Alexander's write up to the Technical Articles section?

[TCS4605R]

I have a PDF drawing of a front brake caliper bracket on the old Yahoo Lotuseuropa site.  It uses a Wilwood 4-pot caliper and fits inside of the the standard Lotus 13" alloy wheel.  I have yet to design or see a design for a rear caliper bracket that use the fixed Wilwood caliper and also has a mounting for a mechanical emergency brake.

Tom
74 TCS - 4605R