Wilwood Manual Cylinder Tilt Angle

[Hemi8]

I am installing manual brakes on a 86 Buick GN, I'm using a Wilwood master cylinder, 7/8" bore, I have 4 wheel disc brakes. I purchased a firewall mounting bracket from TRZ which I thought would work. To achieve a proper 6:1 pedal ratio the master cylinder needs to sit close to level, with the TRZ bracket the push rod has to be cocked at a bad angle to get high enough up on the brake pedal. The firewall is tilted back 17 degrees, the TRZ bracket is only tilted back 12 degrees. If I fabricate a bracket to level the master cylinder the push rod will line up perfectly straight with the brake pedal hole to be used for a 6:1 ratio. Is there some braking design rule that says I need a minimum tilt-back on the master cylinder? I'd like to hear from a true braking expert.

Mike

[malibudave]

Someone correct me if I am wrong, but as long as the holes at the bottom of the master cylinder that supply fluid to the front and rear brakes stay submerged and allow no air in the system, you should be able to mount the master cylinder any way you like after its bench bled of all air.

[parsonsj]

What Dave said.

[Apogee]

I know you're mounting yours flat, so no worries there, but for others mounting their MC's at an angle, beware of the hole between the partitions in the Wilwood units, as the fluid from the front reservoir will drain into the rear reservoir and potentially create a messy situation the next time you remove the lid. I'll plug the hole if I'm installing one at any significant incline.

[dirty rick]

Just jack up the back of the car when / after you bleed to purge any bubbles in the m/c. I run into this with Harley brakes alot.

[malibudave]

I'll plug the hole if I'm installing one at any significant incline.

What do you plug the hole with? Tap it then screw in a plug?

[a67]

Why not use the PowerMaster mounting plate?

Bob.

[Apogee]

Yes, I've tapped it and put a screw in it and I've used epoxy...both worked fine. If you tap it, be sure to capture all of the metal chips as that can damage the seals post haste if allowed to work their way into the piston bores.