Manual or power drum master quest - Team Camaro Tech
Brakes, Suspension & Steering Conversion questions, Steering & Handling

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post #1 of 2 (permalink) Old Aug 28th, 10, 11:49 AM Thread Starter
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Join Date: Apr 2009
Location: NY
Posts: 69
Manual or power drum master quest

Some of the master numbers get vague as most list a 1" for both power and manual 4 wheel drum. Shouldn't power be 1 1/8 and manual be 1"

NYBRIAN is offline  
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post #2 of 2 (permalink) Old Aug 28th, 10, 01:53 PM
Senior Tech
Join Date: Mar 2000
Location: Ann Arbor, MI
Posts: 663
Re: Manual or power drum master quest

Everything I've ever seen has a 1" bore M/C listed for both manual and power DRUM applications. For DISC, usually it's a 1" bore for manual and 1+1/8" for power.

Having said that -- when I converted my '69 from manual to power DRUM, I just added a booster and kept the old 1" master cyl. Brakes would lock up great, but were just too touchy for me -- If I had to do it over, I would strongly consider using a 1+1/8" master cyl with power drums to help "tone down" the sensitivity (you'd probably have to use a power disc master and install external residual pressure valves....)
TMessick is offline  
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