Rear Brake Rotor

[Earley Motorsports]

Hi. I am looking to see if anybody knows what rear brake rotor is used when you are running a MK8 with outboard discs. Thanks in advance for any available help.

[Charles Warner]

That will depend on the application (i.e. upright, caliper choice, CV joints vs. U-joints, etc.)

[Earley Motorsports]

The upright is same dimensions as a Lotus 61. So it has the U joint. Thanks.

[Charles Warner]

What caliper spacing is needed? Thickness desired.

[Earley Motorsports]

That is variable but probably prefer the hat face to rotor rear face 1.50 to 1.85”. The caliper (ld14) mount will be made.
Thanks

[J Leonard]

What brand of car or is it a one off custom?

[Earley Motorsports]

What brand of car or is it a one off custom?

It is on what started like as a Lotus 61 but was quite modified over the years. It has a MK9 in it which I am changing over to outboard discs rather than inboard. It will also be running donuts and U joints, not cvs. Thanks for all the help so far.

[LFFR]

Does it still have the Lotus stub axles...

http://www.leechapmanracing.com/images/rear_axle.gif

or something different???

John Mihalich, Jr.

[R. Pare]

If custom disks need to be made, i do a lot of them.

[LFFR]

R.Pare,

You have a standard setup for the Lotus 20/22/23/31/51/61 rear rotor? Aluminum hat with standard rotor (Coleman or?)???

John Mihalich, Jr.
lffr | hotmail | com

[R. Pare]

No data on that car, unfortunately. However, if you or someone can send me a sample, i can get it drawn up and in the database.

Rotor/hat could be 1-piece, 2-piece solid bolted together, or 2-piece floating. Prices for any of those combos would run somewhere between $275 to maybe $300 each, depending on the design, material costs, and the number produced.

The exception to that cost-wise might be if the rotors are inboard. My "standard' design for floating rotors is to have the drive lugs machined as part of the aluminium hat, but we had an issue a few years ago with that setup on a Crossle - the engine.gearbox vibrations wore the lugs VERY quickly. For an inboard setup, a safer version would be to machine up some steel T-shaped lugs that dog into the hat - the steel should last many times that of the aluminium version, and be repalceable if ever necessary. However, machining the steel lugs would add a fair amount to the machining costs, naturally.