Alfa Brembo Calipers...what hubs?

[Schläfer]

Hi All,

So I've been working some new parts onto my 66 911 and thought it was a good time to fit the Brembo Alfa callipers as part of the swap. I got everything fitted up okay with new vented brake discs (on my original hubs). The car is on a real set of American Racing torque thrust mags. There's no clearance between the wheel and the calliper at all. So, I grabbed some stock steels I have to see if the wheel was a problem. The stock steel doesn't clear it either. I know it's supposed to be a plug and play swap. Is there a difference between the solid disc hub and the vented hub which is causing my fit issue? I know others are using these with no issue?

Many thanks
David

[Chris Pomares]

If I remember correctly the 65-66's and maybe the 67's like my car had the 40 mm hubs. You can run a 5 to 7 mm spacer or go to the 47 mm hub from either 67 or for sure 68. When I had the Alfa Brembo's on my car I stayed with 40 mm hubs, 5 mm spacers, and 6 inch Fuchs. What is the width and offset of the American Racing wheels? I still run 5've all around. I like the 40's as it gives me a little room to play with out board. The 47's take that away. I've since gone to non S Boxster Brembo's and 42 mm piston custom calipers in the rear to keep the 1.6 bias for a huge upgrade. I don't remember if I had to shim the Alfa's to center the rotors, but I had to shim the Boxster calipers outboard 1 mm to get things perfect. I went from a 19 mm to a 20.64 mm master for a perfect pedal feel. The Alfa's didn't require a master change.
Here are some pictures of the Alfa's. If I recall I had to trim the dust shields.
Oh, and I installed 908?, 909?, or 910? quick release pad pins just for fun. Some light machining involved. They are NLA.

[Schläfer]

Thanks for your input Chris, I'd read you'd been using these too. I think the 47mm hub might be a winner. You wouldn't happen to know if that hub is part number 901 341 065 09?

[Chris Pomares]

Not sure on the number. I might have a set, I'll look. I'm sure someone here has a spare set. Post on WTB.
Yikes! I think you'll want a nice used set.
https://www.stoddard.com/901-341-065-09.html.html

[haul]

as I have the alfa front and the PMB rear converted caliper I use 10mm spacers front and rear to keep the wheel alignement.
5 1/2 steelies do fit. fuchs should do easily, too.

[mepstein]

I wouldn’t worry about part numbers, just actual hub measurements. I have them on my 914. I used 69-73 hubs and they bolted right up with 15” cookies and Fuchs.

[Schläfer]

I've had a measure up today. The American Racing wheel will clear the calliper with the original 40mm hub and a 15mm spacer or probably a 10mm spacer on a 47mm hub with corresponding studs to match.

A couple of quick questions:

Haul, are you using the 40mm or 47mm hubs with your 10mm spacers?

Mepstein, I don't really know anything about 914 strut / hub combos. Are they like 911 LWB struts?

Many thanks
David

[Chris Pomares]

If you give me the overall width of the American Racing wheel edge to edge, the offset in mm's or the backspacing to the inside edge, I can usually figure all this stuff out. A picture of the backside would help also. 15 and 16 inch by 6 Fuchs have a 36mm offset. As you can see on the chart, the 5.5 and 6 inch Fuchs have the same backspace. With my Alfa's and Boxster Brembo's I use a 5 mm spacer on the 40 mm hub. I run 16's for better tire choices.
The 5.5 Fuchs have a 42 mm offset. Porsche just added a 1/2 inch to the outside of the wheel to go to 6 by 36 mm offset.
On the next POLO car I'm building I had an extra 1/2 inch added to the inside to go back to the perfect 42 mm offset.
Think 5.5 Fuchs with a 1/2 inch added to both sides.

I posted these pictures, hopefully to help with your project.

[mepstein]

I've had a measure up today. The American Racing wheel will clear the calliper with the original 40mm hub and a 15mm spacer or probably a 10mm spacer on a 47mm hub with corresponding studs to match.

A couple of quick questions:

Haul, are you using the 40mm or 47mm hubs with your 10mm spacers?

Mepstein, I don't really know anything about 914 strut / hub combos. Are they like 911 LWB struts?

Many thanks
David

Sorry, I wasn’t clear. I put 911 LWB front suspension on my 914 and used the Alfa calipers instead of M calipers.

[haul]

A couple of quick questions:

Haul, are you using the 40mm or 47mm hubs with your 10mm spacers?

I have the standard 65 set up - all stock, no change....
https://www.912bbs.org/forum/threads...s.52406/page-2