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post #1 of (permalink) Old 08-07-2001, 09:48 PM
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Brake Booster Install

I replaced my calipers, rotors, and pads in the front. Two weeks later i picked up a stock Cj brake booster. I installed it a new power MC and replaced the wheel cylinders and hardware in the rear. I "T"'ed the booster vacuum line into the PCV line going into the front of my Weber. at first the pedalk would have pressure, it would release and then it would have pressure again about two inches from the floor when the brakes were applied. I checked the vacuum kline for leaks and lubed all the pivot points on the booster while i was under the hood. Now I have to stand on the pedal to get the brakes to engage and the pedal sticks to the floor. I am clueless. Anyone have any idea. Thanks. BUCK

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post #2 of (permalink) Old 08-07-2001, 10:16 PM
 
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Re: Brake Booster Install

Buck,

I'm not under the hood to check, but I'm pretty darn sure you don't want to hook up your brake booster to your PCV valve/hose. It should run off of manifold vacuum. I'm not sure what motor you have, but my AMC V8 has a hole in the manifold with a fitting for the booster hose.

Good luck.

86 CJ-7/360/Ford T-18/D300/D44/D30/fullcage
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post #3 of (permalink) Old 08-07-2001, 10:40 PM
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Re: Brake Booster Install

I have a 258 I6 with Weber 32/36. Whatever the two barrel Weber is for a stock engine

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post #4 of (permalink) Old 08-07-2001, 11:48 PM
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Re: Brake Booster Install

I've seen several boosters using the same point off the manifold as the PCV. There was a "T" feeding each off a different barb. YMMV.

Caver Dave
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post #5 of (permalink) Old 08-08-2001, 08:48 AM
 
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Re: Brake Booster Install

The PB vac hose on my '83 258 was pretty stiff and about 1/2" in diameter.
It went into the largest hole in the manifold right under the carb where all da suction is ... if that helps ...

JAF
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post #6 of (permalink) Old 08-09-2001, 04:57 PM
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Re: Brake Booster Install

You are not getting the flow you need. You need direct manifold vacuum. The PCV is usually too small. Try a big port in the manifold with the biggest hose that fits.
Regards,
Josiah

Hillsboro, OR
1955 Willys CJ5 Buick 225 V6 160HP 270ft-lbs, T90 trans, Warn OD, PTO winch, Spicer 18 T Case, RS9000's, Dana 25F/ 44R,
5.38:1 gears, 11" brakes, Bestop Supertop, Hurculiner
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