Master Cylinder: Has an inlet and an outlet. We’ve already discussed a few terms, but here are the essentials: To achieve this goal, the in-line setup had to hydraulically preserve the ABS system. The wagon’s ABS doesn’t currently work (due to a sensor being broken), but we would like the ability to switch ABS on and off in the future. Furthermore, pulses from the ABS pump via the ABS module might not be effective when routed through the hydraulic handbrake MC. Often, they’ll hydraulically bypass the ABS module in the process. That third item is pretty tricky, it turns out, as most people will insert their handbrake MC lines with fittings between the ABS module and the rear calipers. Modify the factory brake system as little as possible. I decided that I wanted my setup to achieve the following: More than once I even saw recommendations for completely deleting the capability of the foot brake to activate the rear brakes, which is a pretty unsavory option. I had no idea how brake lines and fittings worked.įor the most part, the “how to” videos I found involved teenagers cutting up their factory brake line systems and installing random fittings and then slapping on some teflon tape in hopes of reducing the leakage. I searched for a quality how-to on installing an in-line setup and quickly learned two things:ġ. Not only will it save some money on our budget drift sled, but it avoids having to design and fabricate a dual-caliper bracket.
#WILWOOD HANDBRAKE INSTALL#
This leads us to the desire to install an in-line setup. Additionally, for the E39, no dual-caliper mount bracket exists at this time. For cars with cast aluminum components like our E39, this is realistically not possible. On cars with steel suspension and hub parts, you can often just weld a couple of mounting points on in lieu of a bracket. However, they are inherently more expensive because you need a whole new set of calipers, as well as a dual-caliper mount. This is the preferred setup and will always have better performance than an In-Line setup. In a dual-caliper setup, you mount another set of rear brake calipers (hence the name) and these calipers have a completely independent hydraulic system that routes to the hydraulic handbrake master cylinder, which has its own reservoir for hydraulic fluid. Both use a master cylinder attached to a lever, but the dual caliper setup runs an entirely separate hydraulic system. There are two main flavors of hydraulic hand brake. Thoroughly test any work you perform! Lastly, hydraulic handbrakes are for off-road use only. Modifications to braking systems are particularly hazardous because brake failures are inherently dangerous. This article is for informational purposes only. The standard disclaimer applies: work on and modify your car at your own risk. Take the time to learn it now, and your installation will go smoothly. Fair warning: brake systems are pretty complex, so there is a lot of information in this article. The methodology we used is likely to work for many 90’s and 2000’s BMWs. These are our findings, and we hope they’ll help out future BMW drift builders. Nothing was available off-the-shelf like it is for more popular drift cars, so we had to do some research. When it came time to actually source parts and install the hand brake, however, we found that information was sparse for the E39 chassis.
The wagon’s 4.4L V8 makes plenty of power, but still there are times when a quick lock of the rear wheels would be preferable to a clutch kick. While building our rotting-in-a-field rescue BMW 540it wagon for drift, we eventually came to the conclusion that a hydraulic handbrake would make a nice addition to the car.
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