Is it possible to change the master cylinder angle? - Team Camaro Tech
Brakes, Suspension & Steering Conversion questions, Steering & Handling

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post #1 of 25 (permalink) Old Jul 16th, 18, 06:38 AM Thread Starter
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Is it possible to change the master cylinder angle?

I bought a new master cylinder and vacuum booster. The combo is much longer than the original.
[IMG]master cyl 1 by Patrick Smith, on Flickr[/IMG]


[IMG]master cyl 2 by Patrick Smith, on Flickr[/IMG]

[IMG]master cyl 3 by Patrick Smith, on Flickr[/IMG]


Since the assembly is so long it projects to a much higher height. I am afraid it might hit the hood.

[IMG]master cyl 4 by Patrick Smith, on Flickr[/IMG]


It has a 17 degree angle which is the what the stock one should measure from the factory.

[IMG]master cyl 5 by Patrick Smith, on Flickr[/IMG]

I have read several posts in this forum asking how to reduce the angle to make it more level, but none of them really came up with an answer. Some mention different mounting brackets or adding washers to shim the vacuum booster. I do not have any qualms about cutting and modifying something. I think if I cut the bracket then I will also have to modify the rod that the brake pedal connects to keep the geometry correct.


The hood might close. I do not like the look of the master cylinder looking at the stars.

[IMG]master cyl 6 by Patrick Smith, on Flickr[/IMG]


[IMG]master cyl 7 by Patrick Smith, on Flickr[/IMG]


[IMG]master cyl 8 by Patrick Smith, on Flickr[/IMG]


[IMG]master cyl 9 by Patrick Smith, on Flickr[/IMG]


I am wondering if there is an aftermarket part available or has anyone leveled the master cylinder successfully? Any suggestions would be appreciated.

Patrick
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post #2 of 25 (permalink) Old Jul 16th, 18, 06:47 AM
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Re: Is it possible to change the master cylinder angle?

Try these guys for a bracket

Brake Booster Parts | Brake Booster Rebuild | Brake Boosters - Pirate Jack

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post #3 of 25 (permalink) Old Jul 16th, 18, 09:40 AM
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Re: Is it possible to change the master cylinder angle?

The angle is to prevent side loading for the required pedal ratio. I would not mess with it unless absolutely necessary. Change the booster to a single like the Detroit Speed one if necessary. Those small diameter duals are not great imho...

Don

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post #4 of 25 (permalink) Old Jul 17th, 18, 10:39 AM
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Re: Is it possible to change the master cylinder angle?

Looking at the pics your hood should clear no problem.

Don

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post #5 of 25 (permalink) Old Jul 17th, 18, 10:59 AM
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Re: Is it possible to change the master cylinder angle?

Maybe this would help?
https://www.summitracing.com/int/par...0302/overview/
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post #6 of 25 (permalink) Old Jul 17th, 18, 01:25 PM Thread Starter
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Re: Is it possible to change the master cylinder angle?

Thank you Mr. John and Mr. Don for the suggestions. I agree the master cylinder will clear the hood. The assembly just looks crooked. I did not choose the Detroit Speed master cylinder assembly because the reservoir is made of plastic.

Mr. Simon, I looked at the bracket you found. I might use it as an example to cut my existing brackets and weld them back together. The brake push rod angle will change if I cut the brackets. The rod might bind if I change the angle too much. I could drill a new hole in the brake pedal or maybe use the other one. Moving the push rod to a new hole will affect the pedal ratio. The pedal ratio is one of the factors that determines how much line pressure the brakes can develop. I will have to redo all my calculations if I change the pedal ratio. Nothing is easy. That's why I enjoy this hobby.

Patrick
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post #7 of 25 (permalink) Old Jul 17th, 18, 01:33 PM
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Re: Is it possible to change the master cylinder angle?

DSE generic part numbers are in here:

DSE M/C & Booster part #'s

Don

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post #8 of 25 (permalink) Old Jul 18th, 18, 04:50 PM
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Re: Is it possible to change the master cylinder angle?

What brake rotor diameter are you going to use this with? You could maybe go with a manual brake system
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post #9 of 25 (permalink) Old Jul 19th, 18, 07:34 AM Thread Starter
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Re: Is it possible to change the master cylinder angle?

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Originally Posted by davidpozzi View Post
What brake rotor diameter are you going to use this with? You could maybe go with a manual brake system
Two questions will cause me to write an essay.

I have purchased the rear brakes. They are Wilwood model 140-10012. They use the thinner 14 inch rotor. The calipers have four pistons. The pistons area is small, 1.98 square inches. The caliper name is Superlite 4R. The bore is the 1.12 inches. Since I am using the small piston size calipers, I am under the impression I need the assistance of the engine vacuum to get enough clamping force. If I knew then what I know now, I would have bought a different kit.

I have not purchased the front brakes. I am planning to buy Wilwood model 140-13766. The brake rotors are 14 inches in diameter and use the same type of caliper as the rears but they have 6 pistons. I do not think I can fit the larger Aero type brakes in the front because I am afraid they will not fit inside my wheel. The piston area is 4.04 square inches. The bore is 1.62, 1.12, 1.12 inches.

Brake pads are BP-10 type.

Master Cylinder is 1.125 inch bore size, tandem type with a proportioning valve.

Vacuum booster is a dual diaphragm eight inch model made by Right Stuff.

Patrick
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post #10 of 25 (permalink) Old Jul 19th, 18, 07:55 AM
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Re: Is it possible to change the master cylinder angle?

I run 6 piston Wilwood fronts and 4 piston rears without boost. Works great and don’t have to worry about vacuum or the angle or clearance for a booster

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post #11 of 25 (permalink) Old Jul 19th, 18, 06:14 PM
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Re: Is it possible to change the master cylinder angle?

I had no idea disc brakes could be used without power, I have been struggling with hard peddle from low vacuum and was thinking of getting a vacuum pump.
How can the booster be eliminated? is it the same master?
Sorry to step on this thread but it would also give me more room for the air cleaner on the Procharger.
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post #12 of 25 (permalink) Old Jul 19th, 18, 06:23 PM
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Re: Is it possible to change the master cylinder angle?

Move the brake rod to the top pedal hole and use a different bore MC. 1” will work for Disc/Drum and a 15/16” or 7/8” for disc/disc

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post #13 of 25 (permalink) Old Jul 20th, 18, 05:14 AM
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Re: Is it possible to change the master cylinder angle?

Quote:
Originally Posted by Vega$69 View Post
Move the brake rod to the top pedal hole and use a different bore MC. 1” will work for Disc/Drum and a 15/16” or 7/8” for disc/disc

Thank you, I am 4 wheel disc so I guess the larger the bore the better?
As long as I don't have to stand on the brakes to stop.
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post #14 of 25 (permalink) Old Jul 20th, 18, 05:56 AM
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Re: Is it possible to change the master cylinder angle?

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Originally Posted by bigblockragtop View Post
Thank you, I am 4 wheel disc so I guess the larger the bore the better?
As long as I don't have to stand on the brakes to stop.
Talk to tobin at kore3. He can advise you on bore size and also the best pads to use.

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post #15 of 25 (permalink) Old Jul 20th, 18, 12:23 PM
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Re: Is it possible to change the master cylinder angle?

I used the DSE bracket to lower the angle. It's looks good, I'd tell you how well it works but I think you know where I'm at with my project...

My Mistress rebuild...
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