Unique Calipers on a 1967 911...

[Neunelfer]

Hey Gang,

I thought I'd throw these up here for a little caliper edification. First off, these are quite unique and; very stock. To have both the fronts and rears set-up in a similar fashion is a double whammy!

I knew it the minute I saw these being unboxed, they're special. Freddie Hernandez of "Vintage Sportscar Restorations" sent us this pair off the 67 he's beautifying right now. I've seen them like this before; usually the rears and a few of the fronts but, never both on one car.

Anybody care to guess what is unique about them? Hint: It follows the "Porsche Philosophy" of the day.

Fronts (you can really tell from this angle):


Rears (again, this is a great angle to see the unique issue):

[preS]

356 castings but for vented rotors which could be in the light of 'using up what is on the shelf'? (sorry but the pictures are kind of shiny on my screen). If correct, what is the piston diameter on the rears?

Richard

[Neunelfer]

1/2 point!

This is a solid rotor car but, only one 1/2 is a 356 caliper 1/2. Care to guess which set has 356 1/2's? Piston diameter on the rears is 35mm all the way around. Again, pretty standard for the era but unique.

'using up what is on the shelf'

Full point!

Stop me if I'm getting annoying (or more annoying than I usually am.)

[Jim Breazeale]

[QUOTE=Neunelfer;663994]1/2 point!

This is a solid rotor car but, only one 1/2 is a 356 caliper 1/2. Care to guess which set has 356 1/2's? Piston diameter on the rears is 35mm all the way around. Again, pretty standard for the era but unique.

Eric

I have had bunches of those things. Never on a 67, though. They are found on 64 and 65 911s and 912s, early 66s, too. Yup, the inner half of the rears is from a 356C and the outer half is from a 911/912. Here is a picture of 3 more and one 67 caliper

Regards

Jim
PS: My package arrived today, Thanks a bunch!

[66S]

If a 67 caliper has internal bridging and small diameter bleeders and a 356 caliper uses a bridge pipe and large bleeders Id say the 67 looking half is machined like a 356 and not compatible with a 67 half.

[Jim Breazeale]

If a 67 caliper has internal bridging and small diameter bleeders and a 356 caliper uses a bridge pipe and large bleeders Id say the 67 looking half is machined like a 356 and not compatible with a 67 half.

We are only talking about the rear calipers. 356 fronts and 911/912 fronts are completely different and not the least bit compatible.

Regards

Jim
PS: A complete 356C front caliper will bolt on a 911 and work just fine. You just can't swap parts between the two

[Neunelfer]

Well... Jim nailed the rears. Actually, the "outer" 1/2 which hangs over the rotor is the 356 side. The "inside" 1/2, which mounts to the arm, is the later L-Caliper piece used through 1968.

So... 66S that should answer that question. A 67 911 rear caliper, better known as the rear L-Caliper, is virtually identical to the 356 rear with the exception of the outer casting. Same compensating lines (bridge pipes) and same larger 10x1 bleeders. Jim's spot on, we usually see those in the 65 and 66 era cars.

The fronts are unique too! Does anyone know about the first calipers used in 65 and 66? Well... besides the 356 caliper because, we've done a number of the "first 100" cars and they have 356 calipers on them. There was another caliper that is commonly called the M-Caliper but isn't. We like to call it an L-Caliper front as it more accurately coincides with L-Caliper rears.

Guesses on the fronts after I splayed all that out on the table?

[Jim Breazeale]

Eric

Is, of course, correct. The outer half is 356, not the inner half like I said (Note to self: Proof read your posts before hitting the send button, you dumbass!).
Interesting note. The bolts that hold a 356 rear caliper are all the same length. When mated with a 911 inner half, there are 2 long bolts and 2 shorter length bolts, just like a "L" rear caliper.

Ciao

Jim

[Neunelfer]

Here's a new twist Jim -- Wide L-Calipers have one length bolt. 55mm

I'll call tomorrow. I may need a part if you have it.

E.

[Frank Beck]

Very exciting! Caliper nerd talk!