Rear hub with 928 bearing and increased offset, 928 Hybrid trailing arm, 944 brakes, extended hub offset, parking brak Options

[Wilhelm]

Few pics of a project I'm working on to break up the misery or paint, bondo and rust removal on my V-8 SBC conversion. I'm going to do the sheridan body work on my car and found these wheels which I liked.




The problem is the wheels are 10 inches wide with an offset of 2 inches. In searching the web site it seems that most people with this combo have gone with 3" spacers. This seemed like it would put a lot of force on the bearing and I still would not have many other rear brake options. So.... I found some rear 928 hubs on ebay. the bearings are much larger: 85mm diameter and 47mm wide (versus stock 75mm diameter x 37mm long) and this would provide me with other 5 lug rear brake options. So off to the barn.



First, put a piece of 5 inch 1.25 inch wall DOM(Drawn Over Mandrel steel tubing) in the lathe.

[andys]

Clay,

I've read that opinion before, but unfortunately only after I had already completed the work. Do you know why it doesn't release? Is it a symptom of the Wilwood design? Many cars use calipers and pads for parking brake applications, so I'm wondering what's the deal? Guess I'll find out for myself as soon as I get the wheels on the ground. I have all the 911 stuff just in case this doesn't work out.

Andys

[ClayPerrine]

Clay,

I've read that opinion before, but unfortunately only after I had already completed the work. Do you know why it doesn't release? Is it a symptom of the Wilwood design? Many cars use calipers and pads for parking brake applications, so I'm wondering what's the deal? Guess I'll find out for myself as soon as I get the wheels on the ground. I have all the 911 stuff just in case this doesn't work out.

Andys

It is the Wilwood caliper design. for some reason it won't release after the brake cools if it is set when the rotor is hot.

Wilwood discontinued the spot caliper for that reason (that's what I was told when I phoned them about it).



But this is cool..

Hydraulic Caliper with Mechanical Park Brake

Maybe as a replacement for a stock 914 rear?

[andys]

Clay,

I've read that opinion before, but unfortunately only after I had already completed the work. Do you know why it doesn't release? Is it a symptom of the Wilwood design? Many cars use calipers and pads for parking brake applications, so I'm wondering what's the deal? Guess I'll find out for myself as soon as I get the wheels on the ground. I have all the 911 stuff just in case this doesn't work out.

Andys

It is the Wilwood caliper design. for some reason it won't release after the brake cools if it is set when the rotor is hot.

Wilwood discontinued the spot caliper for that reason (that's what I was told when I phoned them about it).

Clay/Brett/et al,

Today I phoned Wilwood with regard to Clays experience of the caliper sticking closed after applied to a hot rotor and subsequently cooled. I asked to speak to a tech guy with several years experience. The tech guy told me he is unaware that any problems exist in this regard. The only complaints they have center around the un-fixed pad rattling (the moveable pad simply sits loosely in a cavity and can rattle around; kind of a poor design, IMO). He said many of these spot calipers are used on kit cars without issue. BTW, they still offer the spot caliper anlong with replacement pads even though it is not listed on the current site (?). Nevertheless, I told him if I encounter a problem like Clay described, I will call in the complaint. He welcomed any feedback without apprehension.

So, I will try out the spot caliper as you see it in my photo. If it sticks as, Clay describes, I'll post it here and call Wilwood. In the meantime, I'll keep my Carrera parking brake hardware just in case.

Andys