Rear handbrake options

[Rusty]

Was having a look yesterday at 4 pot rearbrake options with handbrake and came across a couple of options.

The first was a modified Wilwood Powerlite caliper with integral handbrake. Looks like a very simple lever based sustem but does offer 4 pot brakes with the a handbrake. Not sure on teh load rating tho, some digging indicated it was quite low (800kg car).

Another option I found was the Wilwood dedicated handbrake caliper. Again, this doesn't look like an engineering masterpiece but if it works:-

http://info.wilwood.com/CaliperList1.aspx?subname=Mech Spot

Another mechanical bake option I found:-

http://www.ipsco.org/Custom%20Services/Parking%20Brake.htm

This thread is quite usfeful on another car forum:-

http://www.gt40s.com/forum/gt40-tech...ndbrake-3.html

[jogi730]

Hi Andy,
Oddly enough, I posted a similar thread as I wouldn't mind getting some upgraded rear stoppers on mine. There is not much available with integral handbrake for the weight of our cars. I'm looking at going down the hydraulic handbrake route now. Much better handrake and far less likely to seize. Although not legal due to consequences of applying when driving down the road, if you leave the mechanical cables in place, it is very unlikely to ever be spotted.
Hope this helps.
Chris

[s2driveruk]

http://www.s2forum.com/forum/showthread.php?t=37847

dont forget that one....if youcan rework the trigger for the parking mechanism then i think its a good stopper

[Error404]

Although not legal due to consequences of applying when driving down the road, if you leave the mechanical cables in place, it is very unlikely to ever be spotted.
Hope this helps.
Chris

Trouble is if you ever had a serious accident then you will be done for having a dangerous / unroadworthy vehicle and also your insurance will be voided

[jogi730]

Has this been looked at?

http://www.marlinsportscars.co.uk/news/115/documents/Marlin%20Hand%20Brake%20Mech%20Prices.pdf

Chris

[mcandmar]

I was told recently the mechanical linkage is no longer required. Subject came up about modern cars having an electrically operated handbrakes. Some models of Audi A6's had them too.

[Jamo]

Has this been looked at?

http://www.marlinsportscars.co.uk/news/115/documents/Marlin%20Hand%20Brake%20Mech%20Prices.pdf

Chris

i can't open the pdf, anyone got anymore details? might work with the RS2 rear calipers oooh looks interesting!

[jogi730]

Specialist car manufacturer Marlin Sportscars have produced a unique mechanical handbrake assembly that makes it possible to fit floating piston aluminium (or steel) brake calipers (Willwood, Brembo, etc) to the rear wheels of kitcars, production cars or hot hatches.


Until now, the legal and practical requirement for an independent mechanical handbrake has meant that anyone using rear disc brakes has had to retain the bulky and weighty OE system. And those in motorsport, who have opted for the weight-saving and high performance of aluminium calipers, have been forced to fit separate additional mechanical calipers - at considerable extra cost and weight.

The new Marlin mechanical handbrake assembly allows the fitment of any make of after-market or OE caliper to the rear wheels - and it can be retro-fitted, so anyone who has been forced to go for a compromise handbrake arrangement can now replace it with this ingenious, lightweight, alternative.

Developed by Marlin’s Mark Matthews, the new system consists of just two mechanism plates (available in stainless steel, steel or alloy), a spacer and retaining pins (on each rear wheel), so the extra weight is minimal and yet it provides an efficient handbrake and meets all legal requirements.

It can be fitted to any two or four-pot, and most six-pot, calipers to provide a cable-operated handbrake, independent of the hydraulic system. And it’s self-adjusting. “Not having an independent handbrake unit to use with rear brake calipers has long been a problem - for us and other kitcar manufacturers, but also for specialist sportscar manufacturers, hot hatch owners

and many people in motorsport,” said Mark Matthews. “Our new system solves the problem simply, legally and at minimum cost and weight.”

For information on a system to fit your car, call Mark at Marlin Sportscars on 01363 773772.

For details and pricing please download our Handbrake mechanism information and prices brochure

To view the brochure you will need Acrobat Reader click here if you dont have it installed

[Jamo]

Ah i meant the link to prices etc is a blank link it doesn't work

seems RS2 guys have thought of this before http://www.rs246.com/index.php?name=...=50874&start=0

[Josh-stateside]

Becareful with the wilwoods because they don't have dust boots and are NPT threads. After read a few books mainly Carroll Smith books I opted to not use the ones I happen to own at one point. His books are mainly about track cars but I like to keep my Npt fittings and teflon to a minimum these days. As far as larger rear calipers are concerned I think alot of people will tell you that it's somewhat overrated when so much of the braking is done with the front wheels. If you look at VAG options there is even a Solid 302x12mm rotor that can work with the stock brakes setup with a custom bracket. When I put 5x112 hubs on my coupe it's going to be from an audi A4. Mainly because i'm in the states and also because I can use a ton of audi A4 rear brake options. Maybe a few of you noticed my Tilton rear proportioning valve setup and that is the start of my rear brake setup. I will install stock A4 rear rotors one my A4 hubs are installed. Once the car is on the roaded and sorted I probably will try the 302x12mm options. If I'm not happy with that option there are plenty of others. Some may say well Rs2's had 4 pots in the rear. Which is good point but there are alot of clever options out there i think in my opinion with stock audi rear calipers.

[s2driveruk]

i seem to remember Corey was doing either something similar or was trialing this setup, dont remember seeing anything to sugest that it worked out though (or the reason why it didnt).

If all it uses are a couple of shim plates to drag the pads together when the handbrake is applied then in theory it hould be pretty simple for someone with CAD experience to create a reasonably standard 4 pot template for something like the rear boxster s calipers so you have a decent range of pad options. I gues then some simple measurements for cable length and something to help release the pads, looks like they have a spring return on the Marlin ones.

I would think if you can get a 300mm x 20+mm vented disc on there from the parts bin then it'd be a good setup.

[Rusty]

I can see that the pad design could lead to uneven application of the pads so not sure how well it would work. The Wilwoods use a lever, if that pressed against the centre of the pads then it should work better.

[s2driveruk]

I can see that the pad design could lead to uneven application of the pads so not sure how well it would work. The Wilwoods use a lever, if that pressed against the centre of the pads then it should work better.

true but i can't imagine this will severly affect anything as the car will be static so the pressure applied by the handbrake would be nothing like the force exterted over the pad when pressing the brake pedal?

[s2driveruk]

found the pdf on that Marlin pricing for the 4 pot handbrake caliper mod:

http://www.marlinsportscars.co.uk/documents/Marlin%20Hand%20Brake%20Mech%20Prices.pdf

[Rusty]

Nice find.