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Tech Area => General Buick Tech => Topic started by: Canmove on August 15 2015, 12:33:06 PM

Title: PM to Vacuum How to???
Post by: Canmove on August 15 2015, 12:33:06 PM
Hello everybody... Rich here from Detroit area... My Power Master brakes took a shit and i want to convert them to a vacuum set up... Any how too's?? or threads on how to??
parts list??
and i did do a search only found hydro threads set ups... thanks for your time.
Title: PM to Vacuum How to???
Post by: Steve Wood on August 15 2015, 05:41:00 PM
Check out the tech section on gnttype.com. you will need either the pedal off a g body with vacuum brakes or, drill a hole in your existing pedal for the correct push rod mounting position. I posted a link on here once showing how to do that.

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Title: Re: PM to Vacuum How to???
Post by: Steve Wood on August 15 2015, 10:43:44 PM
here, this article shows where to drill the hole...   http://www.superchevy.com/how-to/0405htp-buick-turbo-regal-master-power-brakes-install/ (http://www.superchevy.com/how-to/0405htp-buick-turbo-regal-master-power-brakes-install/)
Title: Re: PM to Vacuum How to???
Post by: good2win22 on August 15 2015, 10:47:04 PM
If you have a good junkyard to loot through, you can find a pedal and then visit your local parts store and get the rest.  There is a junk yard donor thread on the big board.  List is something like 34 pages.
Title: Re: PM to Vacuum How to???
Post by: motorhead on August 15 2015, 11:21:07 PM
Yell at it.  Then do what Steve said.
Title: Re: PM to Vacuum How to???
Post by: Shimy87 on August 16 2015, 12:36:48 AM
Get to like laying upside down in the pedal area....you will be there a while bit its worth it  :icon_smile:
Title: PM to Vacuum How to???
Post by: larrym on August 16 2015, 12:56:30 AM
Hidden fastener under the wiring loom.
Title: Re: PM to Vacuum How to???
Post by: motorhead on August 16 2015, 12:49:58 PM
Hidden fastener under the wiring loom.

I thought that the pedal bracket could stay put?  Just the pedal itself had to get switched, and the booster of course.
Title: PM to Vacuum How to???
Post by: larrym on August 16 2015, 01:07:00 PM
It's the one of the 4 that held my old booster on mine was converted when I bought it I recently swapped diaphragms
Title: Re: PM to Vacuum How to???
Post by: xpander343 on August 16 2015, 01:36:29 PM
I'd redrilled my pedal based on some instructions I'd seen somewhere and It never felt really right. I musta had the hole just slight off.   felt like a tiny bit of binding at the start and then it would feel proper once you were partially into pushing it down.  drove me nuts I ended up just getting a vacuum pedal.  So something to consider if you want to reuse your old pedal.
Title: Re: PM to Vacuum How to???
Post by: good2win22 on August 16 2015, 01:39:45 PM
I've done two of these powermaster to vacuum brake conversions.  Pedal bracket can stay.  You can drill a new hole on the existing pedal or you can get a pedal from a vacuum brake g body.  Don't need the vacuum block with the vacuum brake port if you have removed the EVAP canister, just connect vacuum line to the hard line that you capped after removing the EVAP canister. 


Rich has the rights on the hydro boost conversion
Title: Re: PM to Vacuum How to???
Post by: williambavila on August 18 2015, 06:45:37 PM
I have a entire setup for sale. pedal,booster ,and master cylinder. $75+ ride
Title: Re: PM to Vacuum How to???
Post by: earlbrown on August 18 2015, 07:46:53 PM
I actually got a shipment of crap today that I HOPE is the last thing I need to make a DIY conversion kit....


(we'll see if I have to make more orders tough)
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