Master Cylinder question
September 6th, 2012, 03:17 AM
#1
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Join Date: Sep 2011
Posts: 8
Master Cylinder question
I have a 69 Cutlass with four wheel drums. My master cylinder is on it's way out and I was wondering if I could use one for a front disc/rear drum setup. The reason I ask is because I want to upgrade to front disc in the future because I cannot afford to right now. I don't want to have to get a new master just to have to get one AGAIN in a few months. What do you guys think?
September 6th, 2012, 01:07 PM
#4
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Join Date: Jun 2011
Location: West Hempstead, New York
Posts: 935
Master Cylinder Answer
It's your brakes -- it's your life... be ONLY perfect.......
Neither Master cylinder is pricey... if you want U S A made quality ---
call me --- Craig -- 516 - 485 - 1935.....New York.....
Neither Master cylinder is pricey... if you want U S A made quality ---
call me --- Craig -- 516 - 485 - 1935.....New York.....
September 6th, 2012, 02:30 PM
#5
Old(s) Fart
Join Date: Mar 2007
Location: Northern VA
Posts: 47,460
Yeah, you SHOULDN'T use the disk M/C, HOWEVER...
This is a simple hydraulic system. The only thing the wheel cylinders know or care about is the diameter and stroke of the pistons in the M/C. ANY M/C with the same diameter and stroke will function exactly the same as far as braking is concerned. Unfortunately, that's the problem. The drum brake M/C uses a 1" bore. The manual disk brake M/C also uses a 1" bore. The power disk M/C uses a 1.125" bore. The larger the bore in the M/C, the higher the required pedal force for the same brake shoe pressure at the wheels. The power M/C can use a larger bore due to the power assist that lowers required pedal pressure.
This is a simple hydraulic system. The only thing the wheel cylinders know or care about is the diameter and stroke of the pistons in the M/C. ANY M/C with the same diameter and stroke will function exactly the same as far as braking is concerned. Unfortunately, that's the problem. The drum brake M/C uses a 1" bore. The manual disk brake M/C also uses a 1" bore. The power disk M/C uses a 1.125" bore. The larger the bore in the M/C, the higher the required pedal force for the same brake shoe pressure at the wheels. The power M/C can use a larger bore due to the power assist that lowers required pedal pressure.
September 6th, 2012, 02:33 PM
#6
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Join Date: Jul 2010
Location: Montreal, QC
Posts: 2,175
I have a 69 Cutlass with four wheel drums. My master cylinder is on it's way out and I was wondering if I could use one for a front disc/rear drum setup. The reason I ask is because I want to upgrade to front disc in the future because I cannot afford to right now. I don't want to have to get a new master just to have to get one AGAIN in a few months. What do you guys think?
New shoes, springs, cylinders. The whole deal.
My brakes work great and stop on a dime. I dont know why everyone wants to change to disc brakes so badly.
September 6th, 2012, 06:29 PM
#7
Connoisseur d'Junque
Join Date: Sep 2010
Location: The Hudson Valley
Posts: 21,183
I've had plenty of cars with drums all around. As long as they're maintained, they work great.
Though I do like discs a bit better, it's not worth the large amount of effort, time, and money it takes to change a car over.
- Eric
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