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Old 07-20-2008, 06:39 PM   #1 (permalink)
EcoModding Lurker
Join Date: Jun 2008
Location: Stoughton, WI
Posts: 55

Polymer - '89 Honda Civic Hatch Std 4 speed
90 day: 51.49 mpg (US)

Woodstock - '69 MG Midget 1275

Nekobus - '06 Scion xB
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Homemade PVC Vacuum Reservoir (Now with Photos!)

Yesterday, I built a PVC vacuum reservoir to increase my engine-off braking ability.

I used about a 2ft length of 3" diameter PVC pipe, 2 pipe caps, and a threaded hose barb to connect the reservoir to the brake booster.

I drilled a 3/8" hole in the end of one of the pipe caps, threaded the brass hose barb in, then cleaned out the inside of the pipe and glued it up with PVC cement.

I then cut the vacuum hose coming off the brake booster (on the booster-side of the one-way check valve), inserted a T, and connected the reservoir with 1/4" vacuum hose and hose clamps.

I took it out for a test drive and went from 3-4 presses on the brake pedal to 6-8! So I've basically doubled my safety margin! Yippie!

Currently, the reservoir is held in place with liberal use of zip ties. I'll probably whip up something a bit more permanent in the coming days or weeks.

PVC melts so obviously don't put one of these next to the exhaust manifold or you'll find yourself suddenly without brakes!


Last edited by millenniumtree; 07-22-2008 at 01:01 AM.. Reason: Photooozzzzzz!
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