handbrake calipers

Julian West · 11-16-04, 04:54 AM

Has anyone here used a wilwood spot caliper for their handbrake?

http://www.wilwood.com/Products/Cali...-SFM/index.asp

Would appreciate any opinions...

Simon · 11-16-04, 05:23 AM

Aren't they hydraulic?

91740Gt · 11-16-04, 07:57 AM

Julian,

They are fine but makes rear brake, upright area look cluttered and messy in my opinion. Try to go intergral if it is a road use car.

Graham.

Neal · 11-16-04, 09:47 AM

I agree with Graham. They work well but add additional clutter. Be sure to use a balanced handbrake, one with a single cable running to both calipers as it will make adjustment much easier as the cable stretches.

Howard Jones · 11-16-04, 10:42 AM

I think Simon is right. These are hyd calipers and would require a second master cylinder. I think you could use a clutch master cylinder.

The fact that they are hyd. leads me to believe that they would be sort of reduntant. Why not just use a line lock valve in the rear brake line?

91740Gt · 11-16-04, 12:25 PM

Simon and Howard,

Willwood do a mechanical caliper. I,ve just handled some and i assumed that as hydraulic hand brakes are not strictly MOTable Julian, being British, was talking about mechanical ones.

Graham.

osborni · 11-16-04, 01:35 PM

Hand brakes *may* need to be mechanical. Or at least on a separate system from the main brake systems incase of failure. (Not exactly sure which one it is though...)

Wilwood does make a mechanical spot caliper. So does brembo. A separate hand brake caliper will free up options for the main rear caliper, especially if you go with Wilwood, AP, Brembo, etc. fixed calipers.

Neal · 11-16-04, 04:05 PM

My mistake for not looking closer. I have mechanical calipers. I've heard of folks using a hydraulic line lock as an e-brake but it doesn't seem particulary safe. This isn't much different than using something like these. I'd suggest looking at the mechanical units as an alternative.

Wilwood P/N Wil 120-2280, Wil120-2281

killroy · 11-16-04, 04:07 PM

Willwood and Ford both have a very neat parking brake setup. They have a small cable opperated drum brake inside the hat of the brake rotor. The Ford setup is from the Explorer and will fit the explorer 8.8" rear end and some 9" rear ends. I think the willwood may be more generic.

I don't know if either of those could be adapted to the GT40 uprights, but they do get rid of the ugly parking brake caliper and they will let you run a race style caliper that does not have an integrated parking brake.

David Morton · 11-16-04, 07:02 PM

My Ford Explorer handbrake is totally useless and could never be classed as an emergency handbrake. The only thing it's good for is to stop the coffee cups falling over in the centre area behind the shift lever.

killroy · 11-16-04, 07:50 PM

Lets dispel a myth about parking brakes, they are not designed to stop the car, just to keep it from rolling away.

That's why they are called parking brakes, not emergency brakes.

Also, if your explorer parking brake isn't any good, it's probably improperly adjusted or worn out. Ford has a bit of a reputation for sending out cars with parking brakes that are not quite right.

Lastly, consider how much more effective the brake could be on a car that weighs about 50% less than an Explorer.

Howard Jones · 11-16-04, 08:30 PM

The shop that is doing my brake work is looking into the brake drum in the hat wilwood setup. It is going to be a buget thing for me but I will do my GTD that way if at all possible.

By the way this particular shop was a Superperformance Corbra dealer in the past and does VERY professional work on a lot of race cars as well as expensive steet stuff. Anyway he will not install the wilwood mech. spot parking brakes on cars anymore. The problem is that they will work on slighly sloped ground but sooner or later the owner will put the car on a grade that the calpier will not handle and he has had more than one car roll down the hill into someone else.

He said they are a go cart brake and were never ment to be used on a car. FWIW

Lastly I am not sure if they can be opened up to take a thick rotor like 1 1/4" or so.

The drum in the hat is the best idea I think.

killroy · 11-16-04, 09:27 PM

You are in SF, I'm sure that you know about parking on hills.

You should always park with the car in gear. If you do that you won't roll away unless your clutch fails also. You are also suposed to turn your wheels in to the curb and let your car roll untill the wheel hits. If you follow those two rules it would take an act of god or a car accident to move your car down the hill.

I don't even use my parking brake because it's pedal style and it just gets in the way.

There are some people that put them on at stoplights, drive with them engaged, or use them for "drifting". I think those three are the only ways to wear out a parking brake before the car is ready for the scrap heap.

Liability is probably the only reason they stopped using that calliper. They know that there are a lot of people who lack common sense (especialy in SF). They don't want to pay the price for someone elses stupidity.

Please let us know how those willwood drums turn out. I have been thinking about using them but I need a 12" rotor and I would like to use a 2 piston Brembo caliper to match my front brakes.

Julian West · 11-17-04, 04:24 AM

Thanks for all the replies chaps, Altho I perhaps should have made my intenetions clearer. In the UK, the parking/hand/emergencey brake has to be 'mechanically' operated to pass an MOT & be road legal.

Line locks, hydraulic handbrakes etc are not strictly legal.

I've fitted Ap500 4 pot calipers to the rear & they do not have any mechanical brake facility.

Graham & Neal, thanks for your feedback. I had heard varying reports on the wilwood 'spot' caliper & I really appreciate your opinions. I'll order some up & give them a try.

Regards to all,

Brett James-McCall · 11-17-04, 04:43 AM

Julian,
I thought I saw it mentioned here a while ago that AP do a spot caliper. If so, you could get everything to match.

Brett

Malcolm · 11-17-04, 07:16 AM

AP certainly did do a handbrake cable operated caliper. I have a pair sitting on the shelf for future use. However I think they are no longer available and what I bought was old old stock from Roy Lane at Tech Craft.

Never rely on a hydraulic hand brake to hold you car parked for any period of time especially if your brakes have recently been warm/hot. As the rotors/discs cool they shrink loosening the grip of the hand brake. On more than one occaidion I have heard of hydraulic hand brakes failing in this regards with cars rolling away!

IMHO never use the hand brake on your 40 whatever type you have. Always leave in gear with the handbrake off. With typical long periods of inactivity often after a blast on quiet roads or track use, you may get some sticking of pads to rotors/discs. I don't even use the handbrake on my road cars either, but just leave in park or in gear.