A properly set up Manual Brake Conversion Kit improves lap times and makes for a more controllable drift / rally car. There is a lot of incorrect information out there about Manual Brakes, from forums to other videos. Chasebays has sold over 15,000 Manual Brake setups in the last 10 years…everything from winning Road Race chassis to winning Drift chassis.
So forget everything you've heard about manual brakes, forget everything you know about master cylinders and boosters all together. Chasebays has seen it all and knows exactly how Manual Brakes give consistent and controllable brakes.
Every single day numerous times a day, Chasebays get asked “what are manual brakes like?” and sometimes followed up with “my buddy said they suck!” or "just unplug your vacuum hose!". The FACT is, the fastest road race cars in the world have manual brakes. From F1 to GT4. The difference in those setups from just slapping a big master cylinder on a plate and calling it a day, is they use pedal boxes with a 6:1 or 7:1 ratio.
Like anything else on Motorsport chassis, with Manual Brakes, setup is everything. Chasebays make a Single Piston and Dual Piston Brake Booster Delete. Where their Single Booster Delete differs; it's a single piston design and its working with the stock 3.5:1 to 4.5:1 pedal ratio (depending on the chassis). The pedal ratio is basically just a way to measure leverage you're giving the master cylinder, it's the distance from the top swinging axis to the brake foot pad divided by the distance from the top swinging axis to the master cylinder clevis mounting point. Chasebays Dual Piston is a 6:1 Pedal Ratio which is what you see on high end motorsport pedal boxes.
Changing the pedal ratio to 6:1 is a major function and feel upgrade to allow the use of a larger master cylinder. The OE pedal ratio can only leverage so much, so we’re limited to a 3/4 or smaller master cylinder. The improved Motorsport pedal ratio gives you a better mechanical advantage with additional leverage. This means we can use a larger 1 inch master cylinder with more fluid being pushed per mm of piston travel inside. It allows you to have a better braking feel and more force to the calipers with equal or lesser force at the pedal. That translates to less leg effort and more braking power while keeping a similar throw distance.
Chassis Fitment
- All Subaru's (including Subaru BRZ, Scion FR-S, and Toyota 86)
- Firewall modification required
It includes:
• 1 inch Bore Ultra Compact Master Cylinder
• Isolated F/R Circuit High Heat Polypropylene Fluid Reservoir
• Billet Chase Bays Reservoir Cap with High Heat Vented Diaphragm
• Billet MC / Firewall Adapter Plate with Raised Mounting Point (inside is hollowed for weight reduction)
• L-Banjo Front Outlet Fitting for easy front line mounting w/ SS Banjo Bolt
• SS Rear Outlet Hardline to Adj. Bias Valve
• Adjustable Bias Valve w/ -3AN 90º Outlet
• Carbon 4140 Steel Push Rod and Clevis
• Stainless Steel Bolt-On 6:1 Ratio Pedal Adapter
