Alfa Calipers Options

[ConeDodger]

Alfa like this?

I was an early adopter. Eric Shea suggested them and I obviously bit. My rears are the alloy collaborations between 914Rubber and PMB. They are unobtanium now.

[mepstein]

Alfa like this?

I was an early adopter. Eric Shea suggested them and I obviously bit. My rears are the alloy collaborations between 914Rubber and PMB. They are unobtanium now.

They are on eBay and other sites. Now granted, they aren't cheap to rebuild, especially if you want the polished silver finish but similar to 911S calipers, that's just the way it is.

You can also buy new reproductions.

[rgalla9146]

Alfa like this?

I was an early adopter. Eric Shea suggested them and I obviously bit. My rears are the alloy collaborations between 914Rubber and PMB. They are unobtanium now.

Yes.
Please fill in the blanks... What front calipers and master cylinder ? prop valve ?
How do they work ?
Fingers crossed.

I just re-read your reply and realize your rear calipers are the alloy copies of original 6 rears.

[Luke M]

Hi Rory,

Is this setup for the white GT ?

On my 71 914 I use to run a set of 944 turbo on the front and 911 M rears (no e-brakes).
I used a Mercedes 23 mm master cylinder with a T fitting (yeah yeah I know).
I never had an issue with the tires locking up and I drove it like I stole it.

I now have a full set of Boxster calipers w'/ RJ mounts, T fitting, and 23 mm master going into my 6. Using early 911 e-brakes setup. I went with a cam lever bracket setup vs a short cable. Seams to work but time will tell.

My brothers GT has S aluminum calipers up front, PMB mod GT 6 calipers at the rear, T fitting, and a 19 mm master. The pedal feels spongy to me but my brother is ok with it.

[rgalla9146]

Hey Luke
I have S alloy calipers on the front and 914 6 rear calipers (widened 10mm for
vented 911 rotors) on the rear.
With the 6 rear calipers the ebrake cables rub against the exhaust.
This is especially true with headers.
To remedy this I'm going to install 911 ebrakes... I need to find suitable rear calipers.
I do have a full set of 944 turbo calipers and a 23mm MB master.
How did the 944 Turbo calipers mount to the 3 1/2" struts ... and can they mount to the 914 trailing arms ?
As you probably know I'm running 16" Fuchs so no clearance issues.

[burton73]

Hey Luke
I have S alloy calipers on the front and 914 6 rear calipers (widened 10mm for
vented 911 rotors) on the rear.
With the 6 rear calipers the ebrake cables rub against the exhaust.
This is especially true with headers.
To remedy this I'm going to install 911 ebrakes... I need to find suitable rear calipers.
I do have a full set of 944 turbo calipers and a 23mm MB master.
How did the 944 Turbo calipers mount to the 3 1/2" struts ... and can they mount to the 914 trailing arms ?
As you probably know I'm running 16" Fuchs so no clearance issues.

@rgalla9146 What can I do to help you brother, pictures of the bottom of my 6 and a
picture of the vented rear 914-6 caliper. My cables do not touch the Heat Exchangers. I did have eric set up a rear trailing arm with tube reinforcements and Elephant bushing for my V8 car that we changed direction on That was going to use Boxster non S rear with Rich Johnston adapters and vented disks

Best Bob B

[brant]

Took my vented rears off the race car 20 years back when I verified the temps with heat paint…. Not needed
Just extra weight


A really big motor on the track…. Higher top speeds.. Maybe..
But got the car down to 1810lbs by cutting unnecessary weight
And they were not necessary

[mate914]

Took my vented rears off the race car 20 years back when I verified the temps with heat paint…. Not needed
Just extra weight


A really big motor on the track…. Higher top speeds.. Maybe..
But got the car down to 1810lbs by cutting unnecessary weight
And they were not necessary

That is some good experience and wisdom, thank you.
Matt (IMG:style_emoticons/default/flag.gif)

[rgalla9146]

Hey Luke
I have S alloy calipers on the front and 914 6 rear calipers (widened 10mm for
vented 911 rotors) on the rear.
With the 6 rear calipers the ebrake cables rub against the exhaust.
This is especially true with headers.
To remedy this I'm going to install 911 ebrakes... I need to find suitable rear calipers.
I do have a full set of 944 turbo calipers and a 23mm MB master.
How did the 944 Turbo calipers mount to the 3 1/2" struts ... and can they mount to the 914 trailing arms ?
As you probably know I'm running 16" Fuchs so no clearance issues.

@rgalla9146 What can I do to help you brother, pictures of the bottom of my 6 and a
picture of the vented rear 914-6 caliper. My cables do not touch the Heat Exchangers. I did have eric set up a rear trailing arm with tube reinforcements and Elephant bussing for my V8 car that we changed direction on That was going to use Boxster non S rear with Rich Johnston adapters and vented disks

Best Bob B

Hey Bob
Tell me about the Boxter rears and the Rick Johnson adapters.
Do you know the diameter of the Boxter pistons ?
I can't clearly see path of the ebrake cables in you pics.
In my car the cables will be melted by either HE's or headers unless I torture the
the path away from the trailing arm bracket
I have S alloys (48mm)in the front.
I need ~38mm calipers for the rear.
This nearly follows the original ratio front to rear.
The 911 ebrake install is to remedy the cable issue.
What is the finish on your HE's ?
Your car is beautiful.
Rory

[burton73]

Hey Bob
Tell me about the Boxter rears and the Rick Johnson adapters.
Do you know the diameter of the Boxter pistons ?
I can't clearly see path of the ebrake cables in you pics.
In my car the cables will be melted by either HE's or headers unless I torture the
the path away from the trailing arm bracket
I have S alloys (48mm)in the front.
I need ~38mm calipers for the rear.
This nearly follows the original ratio front to rear.
The 911 ebrake install is to remedy the cable issue.
What is the finish on your HE's ?
Your car is beautiful.
Rory
[/quote]

Just some info from the web. The real answer is going to come from Eric or Larry at PMB but they are going to be super busy with Rensport.
I believe that @Sir Andy has Boxster’s all around on his Red 6. My muffler is polished SS custom 2 in 2 out and the Heat Exchangers have bright Ceramic finish.




Old posting from: Luke M
Aug 19 2013, 09:05 AM

I plan to run the standard Boxster calipers all around my car. The car will see street, autox, & some track time so I wanted more braking power. I got some of my parts from Rich (a914guy) check his ad in the members vendor section. I haven't installed the brake setup and have no answer on how they work. The all mighty Sir Andy also has the same Boxster setup on his 3.6 powered 914. He may be a good person to ask on how they work. Yes, you lose the e-brake but I installed a 911 e-brake setup on my 914 control arms. It's not a 5 minute job but it can be done. If I don't like the Boxster setup, I have a backup set of early 911 aluminum S & 914-6 rear calipers to try out.

-----Just general notes from web: Not me---
Gen2 Cayman & Cayman S Brake Sizes
Gen2 Cayman-
Front: rotor dia 298 mm, thickness 24 mm, piston dias 40 & 36 mm
Rear: rotor dia 299 mm, thickness 20 mm, piston dias 30 & 28 mm.

Gen2 Cayman S-
Front: rotor dia 318 mm, thickness 28 mm, piston dias 40 & 36 mm
Rear: rotor dia 299 mm, thickness 24 mm, piston dias 30 & 28 mm.

Non'S':
F Disc 298mm, Pistons in Calipers 2x40,2x36 mm , pad area 216 cm^2
R Disc 292mm, Pistons in Calipers 2x30,2x28 mm , pad area 196 cm^2

"S":
F Disc 319mm, Pistons in Calipers 2x40,2x36 mm, pad area 254 cm^2
R Disc 299mm, Pistons in Calipers 2x30,2x28 mm, pad area 196 cm^2

When I put 16" wheels on my 99, I couldn't believe how close the clearance was to the base brakes, so the bigger S calipers would definitely not fit with the OEM 16" wheels.. Not Bob B

-----------------------------------



Best Bob B

[Luke M]

Hey Luke
I have S alloy calipers on the front and 914 6 rear calipers (widened 10mm for
vented 911 rotors) on the rear.
With the 6 rear calipers the ebrake cables rub against the exhaust.
This is especially true with headers.
To remedy this I'm going to install 911 ebrakes... I need to find suitable rear calipers.
I do have a full set of 944 turbo calipers and a 23mm MB master.
How did the 944 Turbo calipers mount to the 3 1/2" struts ... and can they mount to the 914 trailing arms ?
As you probably know I'm running 16" Fuchs so no clearance issues.

Hi Rory,

On the front the 944 calipers would need to have the mounting ears modified/machined to fit a 3 1/2'' strut mount. VCI use to do the mods but think it's out of business now. Lots of info if you google VCI Porsche brakes. On the rears no clue as I ran the 911 M rear calipers/rotors from a 911. I don't think there's enough material on the caliper mounting ears to make the calipers fit the 3'' rear mounts. I can tell you that the best way I found to get big brakes was the Boxster calipers all the way around. Get the adapters from RJ they work with the 911 carrera rotors up front and the standard 911 rear rotors out back. Get a set of early ( 69-71 ) e-brake hardware and install on the 914 arms. If I had to do it again I'd use the Tangerine kit as well. Just need to make sure the calipers are positioned properly (Lead piston position). As far as the e-brake cables go, I didn't have any issues w my brothers car hitting the exhaust. I guess I better go stick my head under his car and double check to make sure that's the case.


Check Andy's thread here and you'll see my setup :

http://www.914world.com/bbs2/index.php?showtopic=170890

[burton73]

Hi Rory

This is what I think are the fronts with the RJ adapters. Not sure what is different in size, but you can get an idea of the piston size. I went over this with Eric S in Jan or this year.

I have a lot of pictures. I have a set of rear calipers from my 86 Carrera (that car is now with Dax in Belgium with PMB rebuilt calipers on it) that need rebuilding that you can have for free. You just pay the shipping. You can have the fronts as well.

Best Bob B

[porschetub]

Hey Luke
I have S alloy calipers on the front and 914 6 rear calipers (widened 10mm for
vented 911 rotors) on the rear.
With the 6 rear calipers the ebrake cables rub against the exhaust.
This is especially true with headers.
To remedy this I'm going to install 911 ebrakes... I need to find suitable rear calipers.
I do have a full set of 944 turbo calipers and a 23mm MB master.
How did the 944 Turbo calipers mount to the 3 1/2" struts ... and can they mount to the 914 trailing arms ?
As you probably know I'm running 16" Fuchs so no clearance issues.

i have 944T brembo's front and rear which were fitted by PO, I believe the rears are mounted by welding up the old threaded holes and repositioning them,the struts have machined offset inserts threaded into them which as an engineer I think is a clever solution.
All calipers have special 1mm spacer washers that fit between mounting ears I presume these are to centre the calipers to disks , running ER 5mm "shim'' spacers @ the front with 7x16 Fuchs .
PO added new 19mm master cylinder and the whole lot works very well together ,only solution in our country as adaptors are illegal. .

[ConeDodger]

Alfa like this?

I was an early adopter. Eric Shea suggested them and I obviously bit. My rears are the alloy collaborations between 914Rubber and PMB. They are unobtanium now.

Yes.
Please fill in the blanks... What front calipers and master cylinder ? prop valve ?
How do they work ?
Fingers crossed.

I just re-read your reply and realize your rear calipers are the alloy copies of original 6 rears.

Yes. Alfa front. Which are available but not in the beauty contest form @Eric_Shea made them for me. Rears are the alloy copies of the 914-6 rear calipers. You can probably get Eric to build some of the Alfa brakes for you. I don’t think anyone could ever get him to make more alloy rear six calipers unless they ordered 100 sets.
It’s overkill, but if you’ve followed how I built my car, overkill was the point.

[rgalla9146]

Good update on rear calipers.
I found these among my random collection but have no idea what they are from.
Could be VW, Audi, 356, 911 or ?
They're ATEs with 38mm pistons and are suitable for vented rotors. The spacers in
them are as manufactured. These are a good match for alloy S fronts.
They mount on our trailing arms and with a fat washer are near perfectly centered.
They are left and right with the bleeder at the top and the hard plumbing to the
bottom. They take 60mm pads, same as 914 6 rears.
I guess no alloy rears for me.
Anyone know what they're from ?

[mate914]

Good update on rear calipers.
I found these among my random collection but have no idea what they are from.
Could be VW, Audi, 356, 911 or ?
They're ATEs with 38mm pistons and are suitable for vented rotors. The spacers in
them are as manufactured. These are a good match for alloy S fronts.
They mount on our trailing arms and with a fat washer are near perfectly centered.
They are left and right with the bleeder at the top and the hard plumbing to the
bottom. The take 60mm pads, same as 914 6 rears.
I guess no alloy rears for me.
Anyone know what they are ?

(IMG:style_emoticons/default/confused24.gif)

[rgalla9146]

Next mystery.
I've had these 911(what year ?) 944 (?) ebrake parts for years thinking they might come in handy.
Thing is, they seem different from any others that I've seen used in a 914 conversion.
The shoes are wider and the retainers are flat spring steel. See photos.
The shoes are wider than the contact area of my 911 vented rotors so
~1/8" of the shoe hangs outside the drum, so not compatible. (IMG:style_emoticons/default/sad.gif)
The intesting part of these is the stop for the bottom of the shoes is incorporated
in the backing plate. Maybe this feature can be added to the more compatible
911 ebrake parts.
What years of 911 parts are best for this conversion ?

[mepstein]

@MB911 Ben did the conversion recently and needed some different parts to make it work. I’m sure he’ll chime in.

I send my “what’s this caliper” questions to Eric Shea.

[mate914]

Next mystery.
I've had these 911(what year ?) 944 (?) ebrake parts for years thinking they might come in handy.
Thing is, they seem different from any others that I've seen used in a 914 conversion.
The shoes are wider and the retainers are flat spring steel. See photos.
The shoes are wider than the contact area of my 911 vented rotors so
~1/8" of the shoe hangs outside the drum, so not compatible. (IMG:style_emoticons/default/sad.gif)
The intesting part of these is the stop for the bottom of the shoes is incorporated
in the backing plate. Maybe this feature can be added to the more compatible
911 ebrake parts.
What years of 911 parts are best for this conversion ?

1970-73
Matt

[mate914]

Those brake shoes look like the right parts. The center stop on lower portion needs to be welded to rear control arm.
Matt