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Old 08-05-2017, 01:52 PM   #1
fatleon
 
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Default SAS brake question

Do you SAS guys use the original master cylinder? If so, did you add a proportioning valve?
The Nissan caliper has an area of 29 square cm vs 44 in the Dana 44 caliper. That's a big difference, and would change the brake bias quite a bit.
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Old 08-05-2017, 03:21 PM   #2
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I haven't changed mine yet. Many do upgrade the master cylinder though. no need to add the proportioning valve the truck already has one and you are swapping disc brakes for disc brakes. If you had drum in the front and went to disc you would need an adjustable one.
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Old 08-05-2017, 07:36 PM   #3
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I've been running my stock master for well over a year and it works just fine. I can still lock up all 4 tires no problem when I want to.
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Old 08-05-2017, 09:20 PM   #4
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Cool. That's what I was hoping.
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Old 08-07-2017, 10:27 PM   #5
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Try the stock master, first. I found that mine ran out of stroke in panic situations. If the pedal has too much travel, go to a larger diameter piston.

I set mine up with an old-school Chevy C10 master cylinder. It greatly improved braking with the D44, and the disc brake H233B.

I still have the setup, still bolted to the Nissan booster with the modified pin. It's stored in my shed. I no longer have a need for it, and would pass it along for cheap.
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Old 08-10-2017, 03:41 AM   #6
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Thanks Res, I'll go with the stock one for now. I don't mind the feel of big calipers with a smallish master, so as long as I don't run out of travel I'll leave it alone.
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