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Old 01-11-2012, 07:38 AM   #1 (permalink)
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Brake master sizing with discs

Looking for some help with sizing of a cnc dual master pedal setup. right now its 3/4" front and back with toyota 4piston 4cyl calipers at all 4 corners. It stops but not very well. Thinking of going to 7/8" and maybe smaller calipers on the rear.
Any ideas or input? Anyone got a 7/8" I could try?

This is in a toyota based buggy not a Ftoy but figured you guys might know
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Old 01-11-2012, 03:15 PM   #2 (permalink)
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Quote:
Originally Posted by Rocco View Post
Looking for some help with sizing of a cnc dual master pedal setup. right now its 3/4" front and back with toyota 4piston 4cyl calipers at all 4 corners. It stops but not very well. Thinking of going to 7/8" and maybe smaller calipers on the rear.
Any ideas or input? Anyone got a 7/8" I could try?

This is in a toyota based buggy not a Ftoy but figured you guys might know
Pedal feels hard, not responsive? Then go with a smaller a smaller master, pedal will just hit lower.

Spongy, low pedal, but grabby on the brakes, go to a larger master.
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Old 01-12-2012, 07:24 AM   #3 (permalink)
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Thanks.

its spongy and hits low.

I was hoping that someone ran a similar setup and could confirm that the 7/8" masters worked for them.
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Old 01-15-2012, 07:49 PM   #4 (permalink)
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I went down the CNC road 2X with no success. I know stock is not as cool, but $75 later I got a junk yard master, booster and pedal assembly. Been running it for 3 years now and never gave it another thought.
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Old 01-30-2012, 07:43 AM   #5 (permalink)
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Well I installed the 7/8" bore front and rear with res valves and its a lot better. Not good enough though, going to try 2wd calipers on the rear.
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Old 03-16-2012, 08:42 PM   #6 (permalink)
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my buggy is running two 1" with no proportioning valves and my brakes are locked up with a small touch to the peddles. Was working on it tonight and and a few things broke off. Might order willwood 7/8s with proportioning valves to replace what I got on there
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Old 03-17-2012, 08:27 AM   #7 (permalink)
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Actually one 7/8 for rear and one 1" for the front. Should I step both down to 7/8 ?
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Old 03-17-2012, 10:51 AM   #8 (permalink)
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huh, thats funny you guys are running 7/8 or 1" on toy brakes.

we all did this years ago and when we tried 7/8", the pedal was too hard to push.

so since then, all of us are on 5/8" front and 5/8" rear and have been ever since. they work great.
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Old 03-19-2012, 03:17 PM   #9 (permalink)
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bought the buggy like that
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