チェイスベイ デュアルピストン ブレーキブースター削除 ボルトオン 6:1 ペダル比

• Honda | Nissan | Mazda | Mitsubishi | AE86 [CB-DBBE-U]

Honda Acura (Civic, Integra, RSX, TSX)
Nissan (240SX/Silvia, Skyline, 350Z/G35, 510)
Mazda (Miata, RX-7)
Older Toyota (AE86, TE72)
Mitsubishi (Evolution, Eclipse, 3000GT)

• BMW E30 | E24 | E34 | Porsche | VW

BMW E24, E30, E34
Porsche 944, 928
1990-1999 Volkswagen VW

• BMW E36 | E46 [CB-DBBE-E346]

BMW E36 | Z3 (including 318ti)
BMW E46
BMW Z4

• Toyota Supra | SC300 | Soarer | IS300 | Nissan 280Z [CB-DBBE-MK]

Toyota Supra MK3/MK4, Soarer, Altezza
Lexus SC300 / SC400
Toyota Cressida MX73
1970-1977 Celica TA23, RA23, RA24, RA25, RA28, TA28 & RA29
Datsun / Nissan S30 Chassis 240Z / 260Z / 280Z

• Toyota GS300 | MX83 | JZX90 | JZX100 [CB-DBBE-MX]

Toyota GS300 | Aristo
Toyota Cresta/Chaser/Mark II JZX90, JZX100, JZX110

As with everything else on a motorsport chassis, setup is crucial for manual brakes. We manufacture single-piston and dual-piston brake booster deletes. The single booster delete features a single-piston design and is compatible with the factory 3.5:1 to 4.5:1 pedal ratio (depending on the chassis). The pedal ratio is a measure of the leverage applied to the master cylinder, calculated by dividing the distance from the master cylinder's pivot point to the brake pedal by the distance from the pivot point to the master cylinder's clevis mounting point. Our dual piston has a 6:1 pedal ratio, which is the ratio found in high-end motorsport pedal boxes." dir="ltr" data-ved="2ahUKEwiE8o2bq8qUAxVTklYBHWhsOb0Q3ewLegQIDRAV" role="text" id="tw-target-text" data-placeholder="Translation" class="tw-data-text tw-text-large tw-ta" tabindex="-1">• Unlike unreliable power brakes designed for non-motorsport applications, this is a consistent and controllable braking system that provides the exact same braking force every time. This leads to improved lap times and a more controllable drift/rally car.

• The included bolt-on bracket allows you to change the pedal ratio from 4:1 to 6:1, increasing the leverage effect on the master cylinder. This allows you to achieve the incredible braking force unique to manual brakes.

• Features a true dual-piston master cylinder and independent front/rear circuits within the reservoir. If the front brakes fail, you can still safely stop with the rear brakes, and vice versa. As such, it is approved by numerous governing bodies including FIA, FD, SCCA, and WRC.

• The world's fastest road race cars, from F1 to GT4, all use manual brakes. This product allows you to maximize that potential without fabricating a pedal box under the dashboard or complex work.

A properly set up manual brake conversion kit improves lap times and enhances control in drift/rally cars. There is a lot of misinformation about manual brakes circulating in forums and videos. We have sold over 15,000 manual brake systems in the last 10 years. We have installed manual brakes on every type of vehicle, from championship-winning road race chassis to championship-winning drift chassis.

Forget everything you've heard about manual brakes, and everything you know about master cylinders and boosters. We've experienced every situation and understand exactly how manual brakes provide stable and controllable braking performance.

Every day, many times, we are asked, "What's it like to have manual brakes?" Sometimes it's followed by, "My friend said it's terrible!" or "You just unplug the vacuum hose!" But the fact is, the world's fastest road race cars, from F1 to GT4, all use manual brakes. The difference from a simple setup of just bolting a big master cylinder to a plate is that they use a pedal box with a 6:1 or 7:1 pedal ratio.

As with everything else on a motorsport chassis, setup is crucial for manual brakes. We manufacture single-piston and dual-piston brake booster deletes. The single booster delete features a single-piston design and is compatible with the factory 3.5:1 to 4.5:1 pedal ratio (depending on the chassis). The pedal ratio is a measure of the leverage applied to the master cylinder, calculated by dividing the distance from the master cylinder's pivot point to the brake pedal by the distance from the pivot point to the master cylinder's clevis mounting point. Our dual piston has a 6:1 pedal ratio, which is the ratio found in high-end motorsport pedal boxes.

Manual brakes are also very effective in environments like drifting and rallying, where entry angles and speeds differ in almost every corner. We are constantly making fine adjustments during driving. Even if you drive the same corner 10 times, you might only hit the foot brake half the time. Also, left-foot braking is more common. Since the left foot is not used to braking, it's often done during driving for corrections. Applying slightly stronger foot pressure in the slightly firmer 90-99% braking range provides some margin to prevent front wheel lock-up, making it easier to modulate with the opposite foot, which is accustomed to controlled modulation. Sensitive power brakes are not ideal for left-foot braking." dir="ltr" data-ved="2ahUKEwiE8o2bq8qUAxVTklYBHWhsOb0Q3ewLegQIDRAV" role="text" id="tw-target-text" data-placeholder="Translation" class="tw-data-text tw-text-large tw-ta" tabindex="-1">Changing the pedal ratio to 6:1 allows for the use of a larger master cylinder, significantly improving function and feel. The stock pedal ratio has leverage limitations, restricting the usable master cylinder to 3/4 inch or smaller. The improved motorsport-spec pedal ratio enhances mechanical advantage through greater leverage. This means you can use a larger 1-inch master cylinder, which displaces more fluid per 1mm of piston stroke. This results in improved brake feel and increased braking force to the calipers, with the same or even less pedal effort. As a result, you can reduce foot fatigue and increase braking force while keeping pedal travel almost the same.

What are the advantages of manual brakes?

A proper manual brake system (pedal ratio matched to master cylinder bore size, appropriate pad compounds, and front/rear brake balance adjustment) provides the exact same braking force every time. The true value of manual brakes comes from adjusting the maximum braking force just before lock-up. We call this the "90-99% zone." With power brakes, it's impossible to precisely determine the foot pressure needed for exact braking force. Especially with boost functions, braking consistency significantly decreases. Even if your friend has done X or Y on the track, it's just personal anecdote. Information from motorsport data is not wrong. Indeed, the 90-99% braking force zone requires a little more foot pressure than power brakes, but that's why power brakes are superior. This is a huge advantage because you can find the optimal foot pressure every time. Manual brakes are very beneficial because they allow you to find the optimal foot pressure every time. If you feel that manual brakes don't feel good, there might be something wrong with your setup. But don't worry, we're here to help you pinpoint the cause.

Manual brakes are also very effective in environments like drifting and rallying, where entry angles and speeds differ in almost every corner. We are constantly making fine adjustments during driving. Even if you drive the same corner 10 times, you might only hit the foot brake half the time. Also, left-foot braking is more common. Since the left foot is not used to braking, it's often done during driving for corrections. Applying slightly stronger foot pressure in the slightly firmer 90-99% braking range provides some margin to prevent front wheel lock-up, making it easier to modulate with the opposite foot, which is accustomed to controlled modulation. Sensitive power brakes are not ideal for left-foot braking.

What's wrong with power brakes?

Power brakes are inconsistent, too sensitive, or too soft (especially with boost). In a lap where you're entering a braking zone at over 160 km/h, braking feel must be consistent to shave off lap times. Everyone has experienced vacuum-assisted brakes where the braking force from one pedal press is completely different from the next. This is fine for the average driver who wants to drive with as little effort as possible, with little attention in the city. However, it is completely unsuitable for road race, rally, and drift chassis. That's why manufacturers like Tilton make manual pedal boxes that mount under the dashboard.

I want manual brakes and a 6:1 pedal ratio!

How can you achieve the functionality of F1, IndyCar, IMSA, and GT4-style pedal boxes without spending over $3,000 on parts, days of preparation, or relocating and fabricating components under the dashboard? How can you achieve a dual-piston / independent front/rear circuit braking system approved by almost every governing body from FIA to Formula Drift, SAE, and DOT? How can you achieve this without removing the factory pedal, drilling holes, or making extensive modifications to the firewall or interior? After years of effort, testing, and sourcing components, Chase Bays has finally found the answer.

The Chase Bays Dual Piston Brake Booster Delete Kit (with bolt-on 6:1 pedal ratio) is an all-in-one package that easily brings high-end motorsport braking to your car. Contents:
• 1-inch bore ultra-compact master cylinder
• Independent front and rear circuit high-heat polypropylene fluid reservoir
• Billet Chase Bays reservoir cap with high-heat vented diaphragm
• Billet master cylinder / firewall adapter plate with raised mounting points, hollowed out internally for weight reduction
• L-shaped banjo front outlet fitting for easy front line installation (with stainless steel banjo bolt)
• Stainless steel rear outlet hardline for adjustable bias valve
• Adjustable bias valve with -3AN 90° outlet
• Carbon 4140 steel pushrod and clevis
• 6:1 ratio stainless steel bolt-on pedal adapter