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Wilwood High Volume Integral Reservoir Master Cylinder - .750 Bore

Wilwood High Volume Integral Reservoir Master Cylinder - .750 Bore

Wilwood's High Volume Master Cylinders are made from high-pressure die-cast bodies and feature 8.2...

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Product Information

Full details

The Wilwood High Volume Integral Reservoir Master Cylinder (.750 Bore) is designed for automotive enthusiasts and builders seeking robust braking performance from a reliable component. Its key benefit is superior fluid capacity and a generous piston stroke, offering improved brake feel and consistent performance, especially with large caliper setups. A potential caveat is its specific mounting dimensions, requiring careful pre-installation checks.

All features

Model Part Number260-6764
BrandWilwood

Extended Product Information

FAQs

What is the primary advantage of the High Volume design?

The High Volume design offers 8.2oz of fluid capacity, the highest among integral reservoir designs, which provides extra margin and consistency, especially under heavy braking or with large caliper pistons.

What type of brake fluid should I use?

Wilwood typically recommends DOT 3 or DOT 4 brake fluid for their master cylinders. Always refer to the product's specific documentation or consult Wilwood's recommendations for the most accurate fluid type.

Can I use this master cylinder with different bore size calipers?

Yes, this .750" bore master cylinder is designed to work with various caliper configurations. However, for optimal performance, it's important to match the master cylinder bore size to your caliper piston area ratio for balanced braking.

What does 'integral reservoir' mean?

An integral reservoir is one that is built directly into the master cylinder body, as opposed to a remote reservoir that is plumbed to the master cylinder.

What are the mounting dimensions?

This master cylinder features a vertical flange with 2.25" mounting hole centers.

How do I prevent moisture from entering the reservoir?

The master cylinder uses formed steel lids with bellow-type gaskets designed to seal out moisture effectively. Ensure the lid is properly seated and the gasket is in good condition.

Is this master cylinder suitable for racing applications?

While designed for high performance, specific racing sanctioning body rules and application requirements should be checked. Its features like high fluid capacity and robust construction lend themselves well to demanding use.

Troubleshooting

Brake pedal feels spongy or soft

Ensure the brake system is properly bled. Check all connections for leaks. Verify the master cylinder reservoir is adequately filled.

Brake fluid level drops unexpectedly

Inspect the master cylinder body, seals, and outlet port for any signs of leaks. Check the brake lines and caliper seals as well.

Master cylinder does not provide sufficient braking force

Confirm the .750" bore size is appropriate for your caliper piston area. Ensure the brake lines are not restricted and the system is correctly bled.

Brake pedal does not return fully

Check the internal retraction springs for proper function. Ensure there are no obstructions preventing the piston from returning.

Pros and Cons

Pros

  • Significantly higher fluid capacity than competing master cylinders.
  • Extended piston stroke accommodates larger caliper piston volumes.
  • Durable construction with high-grade aluminum and steel components.
  • Designed for responsive brake pedal feel due to strong retraction springs.
  • Moisture-resistant design ensures component longevity.

Cons

  • Specific mounting pattern (2.25" centers) may not be a direct fit for all applications without modification.
  • Single outlet configuration limits immediate multi-circuit setups without additional proportioning valves.
  • Requires precise fluid level maintenance to benefit from high volume.
  • As a performance part, installation may require advanced mechanical knowledge.

Setup, Compatibility & Care

Setup:

  1. Ensure the master cylinder is compatible with your vehicle's braking system requirements, considering bore size and fluid volume needs.
  2. Mount the master cylinder using its vertical flange and 2.25" mounting hole centers. Ensure a secure fitment.
  3. Connect brake lines to the 7/16" inlet and 3/8" outlet ports. The outlet is a 1/8-27 NPT thread.
  4. Bleed the brake system thoroughly according to standard procedures to remove all air.

Compatibility:

  • Designed to work with hydraulic braking systems.
  • Requires compatibility with its 2.25" mounting flange pattern.
  • The .750" bore size is suitable for many street performance applications, but verify it matches your caliper piston area ratios.
  • Utilizes standard NPT fittings for the outlet port.

Care:

  • Regularly check brake fluid levels in the reservoir and top off with the recommended brake fluid (DOT 3 or DOT 4 is typical, verify manufacturer recommendation).
  • Inspect the reservoir lid and gasket for damage or signs of leakage. Ensure a proper seal to prevent moisture ingress.
  • Periodically clean the exterior of the master cylinder with a mild degreaser and a cloth. Avoid harsh solvents that could damage seals or paint.
  • Monitor brake fluid condition. If it appears discolored or contaminated, it should be flushed and replaced.

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