engine and drivetrain Rear Brake Disc Conversion

[Leigh Kelly Morris]

Good Morning,

 

I am in the process of my restoration on my 72" roundie.

 

I am going to be running twin40's on it, But maybe thinking I could do with good brakes,

 

Anyone tell me how to or what to use for Rear disc brakes on the back?

 

Many Thanks

 

Leigh Kelly 

[M3M3]

Do a search on term rear disk brake. Many detailed threads on this.

[Kidasters]

What Marshall said.

 

I didn't even try hard.  I typed in "rear brake" from the home page in the search box, and turned up this:

 

http://www.bmw2002faq.com/articles.html/_/technical-articles/rear-disc-conversion-with-caliper-at-300-and-9-r114

 

And I did all that with 4 fingers of whiskey in me.  So - you can too.

 

Nice write-up by Eurotrash (shout out Jason!).

 

So, there you go.

 

Ken

Edited August 7, 2014 by Kidasters

[eurotrash]

(blush)

[flyingjolly]

Install the rear wheels and adjust the proportioning valve to achieve proper bias.

so what's the best technique for that? Drive in cirlcles and brake hard and adjust until the rear brakes lock before the front brakes and then go a step back?

[TobyB]

track day.

 

t

[ray_]

Install the rear wheels and adjust the proportioning valve to achieve proper bias.

so what's the best technique for that? Drive in cirlcles and brake hard and adjust until the rear brakes lock before the front brakes and then go a step back?

 

Proportioning valves -- an interesting topic. Do your research.

 

Cheers,

[M3M3]

+1 for track day.

 

or don't bother with a pressure limiting valve on a street car.  put cheap ass pads on the rear and good performance pads on the front.  this creates a front bias which is what you are looking for.  common technique in race cars to bias the brakes via pad characteristics.

 

you can even remove part of the material on the rear pads to decrease the surface area.

Edited August 8, 2014 by mlytle

[M3M3]

Proportioning valves -- an interesting topic. Do your research.

 

Cheers,

yes.  what is commonly called a proportioning valve is actually not.  it is a pressure limiting valve.  all it does is cut pressure to the brake line it is on.  when installed on a rear line, it cannot increase rear bias.

[Chamonix72]

I was going to say, I run rear discs on the stock braking system and have nary an issue. I even took it out on the track as-is with no issue.