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Author Topic: Master Cylinder and Booster  (Read 190 times)

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foundinafield

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Master Cylinder and Booster
« on: October 14, 2020, 11:08:07 »

Hey there folks, my master cylinder and or Booster have gone bad and I'm looking to upgrade if possible. i keep seeing the K-car booster mentioned here and am wondering if anyone can give me any details on that swap? such as is it ONLY the booster mated to a standard Master cyl, or would I also need the whole unit for the K-car? are there any fitment issues with brake line placement? Also is there any particular model of K-car id need to order or will any of them work? TIA for your feedback
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lsm360

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Re: Master Cylinder and Booster
« Reply #1 on: October 14, 2020, 11:24:29 »

I don't know that it is an "upgrade" I believe (could be wrong) that is sometimes used for clearance when doing a big block swap and headers.
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'89 Diplomat S code AHB now with FI 410 C.I.D. smallblock
1979 Power Wagon 150 Short bed Factory 360-4
2010 Charger Pursuit 5.7

DobaMark

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Re: Master Cylinder and Booster
« Reply #2 on: October 14, 2020, 12:56:49 »

Yeah, it's not really an upgrade. It's to make more room when the engine needs more clearance (like for a big block swap or taller valve covers).

The first thing would be to determine which is bad, the booster or the master cylinder. They have very different symptoms. A bad booster causes a hard pedal. A bad master cylinder generally causes a soft pedal and poor braking performance. It's rare for both the be bad, though it can happen (master cylinder leaks at the rear seal, brake booster sucks in that fluid and it ruins the booster diaphragm).
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lsm360

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Re: Master Cylinder and Booster
« Reply #3 on: October 14, 2020, 19:12:04 »

I recently thought my booster was bad. Brake pedal was super hard. Turned out vacuum hose had split. Simple fix.
« Last Edit: October 14, 2020, 19:12:58 by lsm360 »
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'89 Diplomat S code AHB now with FI 410 C.I.D. smallblock
1979 Power Wagon 150 Short bed Factory 360-4
2010 Charger Pursuit 5.7
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