Mk 1 Pedal Box

[Peter Barnes]

Help Please. What size (bore) are the 2 brake and the clutch master cylinders ? ( single pot calipers as early cars). Also, what size , part number, are the needle roller bearings, there are 7 in total ?
Thanks, Peter.

 

[Ryan L]

doesn't the parts book give you the bolt size? from there its only going to be a few different nominal sizes that It could be.

 

[Ian Clark]

Sounds like an interesting project you've undertaken! Are you making your own pedal box to the original GT40 dimensions? Do you know the pedal ratios, clutch slave cylinder and brake caliper diameters? From that its easy to figure out what you need. Cheers

 

[Peter Barnes]

Thanks Ian, Yes building a pedal box. I now have the bearings. Still no information on the bore size of the Girling master cylinders, I'm sure someone out there knows, Help please. Peter

 

[David mono]

I think the bore size is .625

 

[Peter Barnes]

I think the bore size is .625

Thanks David, I think you are correct but I did read somewhere that the front master cylinder was 0.625 and the rear 0.7, the same as the clutch master cylinder, but I need confirmation.

 

[Ryan L]

@pjbs
go here

Original GT40 SAE Papers

Go to the link below to find a complete set of the original GT40 SAE papers written by FoMoCo engineers that detail the development of the car. These have been in the public domain for years if you knew where to find them. Some guy sells them on eBay for $100. Now you can get them right here...

www.gt40s.com

page 96 of PDF has brake specs.

 

[Peter Barnes]

Hi Ryan , Thanks for sharing that info, very helpful. cheers Peter.