rebuild kit for '66 'S' calipers ?

[haycait911]

do I use the rebuild kit for regular calipers to rebuild my 'S' calipers? as I understand it the early 'S' calipers were regular ones with a spacer in the middle to allow for the vented rotor. this would indicate that I can use the regular kit. any thoughts/help much appreciated. Don.

[ttweed]

Yes, your assumption is correct--the piston sizes were the same for the early '65-68 calipers, and the "S" just used a spacer to allow the wider vented rotor. I have always been able to get the kits from the dealer.

TT

[91167coupe]

Is it possible to transform standard calippers for solid discs to the S-type for vented discs? And if this is possible f. ex with the earlier mentioned spacers, will vented discs fit on the car without further modifications?

I have a standard 1967 911.

Thanks

[ttweed]

Is it possible to transform standard calippers for solid discs to the S-type for vented discs? And if this is possible f. ex with the earlier mentioned spacers, will vented discs fit on the car without further modifications?

I think the short answer is "Yes", but why? If your car did not come with the S brake option, it will not be original that way. It might also be more expensive than it is worth, as far as improving the car's braking. The only reason to have the vented rotors is for thermal compliance purposes. If you are using the car so hard that brake fade is an issue, I would try cooling options first, then upgrade to later model brakes (SC or Carrera) instead.

You may be able to find the spacers--I would contact Eric (Neunelfer) who wrote the excellent thread on rebuilding calipers--he may have some spare parts around, or know where to source them, and the rotors are a bolt-on proposition, but the rear '67-68S vented rotors are quite expensive (~$800/pair), so you could probably swap out the whole front end for an SC suspension and spend the same $$$! There is a possibility of using an early 944 rear rotor instead, to save some money there, but I would consider carefully what your purpose is in doing such an upgrade before proceeding with any changes.

TT

[911quest]

Another note is the front hubs on the SWB cars are different and if you use "vented" calipers on the fronts they can rub the wheel unless you us a spacer between the wheel and the hub.

and what mean by different is there depth

[Neunelfer]

Tony's got it right. The hubs are shallower by about 3-4mm. This is roughly 1/2 the thickness of the 7mm spacer that is in the M-Caliper.

To answer the question about spacers and transforming calipers; it can be done but remember, you'll have to get the longer fasteners as well. Once you do the math it's a no-brainer to simply get a grundgy old set of M-Calipers with the spacers and restore those for your application. "Dime-a-Dozen". Save your non-spaced calipers.

The front kits are the same for all M-Calipers (Regular and Wide). They're even the same on A-Calipers and Carerra Calipers (Wide A-Calipers). 48mm piston up front from 1966 to 1989.

The rear kits are different as the very early cars have the 35mm pistons (L-Caliper) and later (68 on?) have the 38mm pistons and the rear M-Caliper.

[91167coupe]

Thanks for your information regarding brake upgrading! I have a 67S engine in my car, thats the reason for the brake upgrade.

Yes, the best way is to buy a set of the 67-68S/L brakes, but here in Norway these parts are about obtainable, and expensive to ship from USA because of the weight.

Thanks again for your tips!!

[Neunelfer]

Thanks for your information regarding brake upgrading! I have a 67S engine in my car, thats the reason for the brake upgrade.

Yes, the best way is to buy a set of the 67-68S/L brakes, but here in Norway these parts are about obtainable, and expensive to ship from USA because of the weight.

Thanks again for your tips!!

With the exchange rate what it is and, the new International Flat Rate box ($35.55) it seems this would not be a problem. For the fronts you need simple M-Calipers (dime-a-dozen).

Good luck.