Are '65 and '68 brakes the same?

[mshaver51]

Does anyone know whether the brake rotors, spacers, backing plates, etc., changed between 1965 and the late-'67/early-'68 model years?

I suspect that my (August '67 build) '68 will need new rotors and I'm trying to determine whether I can search for other years.

Any shared wisdom would be appreciated.

Thank you.

[jesseandersson]

I believe the 68- cars had 7mm wider hubs in front and a 7mm spacer in the rear.

Came with the switch to 5,5" wheels

[chris_seven]

The discs are basically the same if they are solid discs on the 67/68 car rather than vented as the back plates differ on the front. The solid front disc was used on the T up to 1969.

A Programme Cars also had a thin spacer screwed to the rear disc.

The piston diameter on the rear calipers may also change as the 65 car had 35m dia piston and by 68 they were 38mm dia.

[Jim Breazeale]

The discs are basically the same if they are solid discs on the 67/68 car rather than vented as the back plates differ on the front. The solid front disc was used on the T up to 1969.

A Programme Cars also had a thin spacer screwed to the rear disc.

The piston diameter on the rear calipers may also change as the 65 car had 35m dia piston and by 68 they were 38mm dia.

The piston diameter of the front and rear calipers is the same through the 68 (SWB) year model cars. The calipers changed a bit in appearance but not in function or fit.

Regards

Jim

[72targa]

The piston diameter of the front and rear calipers is the same through the 68 (SWB) year model cars. The calipers changed a bit in appearance but not in function or fit.

Regards

Jim

You, sir, are a wealth of knowledge...

[chris_seven]

Jim,

I am not sure what you mean.

Fronts were always 48mm dia pistons right through to 3.3 Turbo.

Rear pistons were initially 35mm and I am not sure when they changed but when cars had solid discs it was around 1967/68

The 67 MY 911S with vented discs had 38mm pistons.

The T with solid discs also had 38mm pistons by 1969.

[John Straub]

I'm thinking the front hubs on a '67 are a little wider than on a '65. Anyone know for sure?

John

[Jim Breazeale]

Jim,

I am not sure what you mean.

Fronts were always 48mm dia pistons right through to 3.3 Turbo.

Rear pistons were initially 35mm and I am not sure when they changed but when cars had solid discs it was around 1967/68

The 67 MY 911S with vented discs had 38mm pistons.

The T with solid discs also had 38mm pistons by 1969.

Chris

The rear pistons changed to 38 mm with the change from SWB to LWB. All SWB cars, with solid rotors had 35mm rear pistons and rear calipers with external cross over fluid pipes. You are correct, I should have mentioned that 67Ss and 68Ls and Ss had special rear calipers with 38mm pistons, external cross overs and spacers for vented rotors. 69 912s and 911Ts had rear calipers with 38mm pistons, soloid rotors and internal crossover passageways along with different bolt spacing.

Regards

Jim
PS: The original question was dealing with 65 to 68 rotors. That question has been answered previously. They are the same.

[Jim Breazeale]

I'm thinking the front hubs on a '67 are a little wider than on a '65. Anyone know for sure?

John

They got wider in the 68YM cars along with the increase in wheel width. The rear hubs got a 8mm spacer added during the 68 ym .

Ciao

Jim

[gsjohnson]

A little off topic...Do the front backing plates differ from vented to non vented rotors?