Manual Master Cylinder - The 1947 - Present Chevrolet & GMC Truck Message Board Network

68racer · 01-23-2013, 01:05 PM

I know this has been covered before but I just want to check.
I want to convert from power brakes to a manual, which bore size should I go for 3/4 or 1 inch?
Also any reccommendations for which one to use?
I may have a deal on a Wilwood 3/4 inch.
Thanks,
Neil.

hotrod 80 · 01-23-2013, 02:24 PM

It depends on what tye of brakes you have . I will post a few links for better info tonight .

68racer · 01-23-2013, 02:46 PM

Sorry forgot to say it is a '73 front clip with the HD discs, nine inch with drums on the back but I may put discs out there too.

**Captainfab** · 01-24-2013, 12:14 AM

Typically a manual master cylinder would have a 1" bore.

Marv D · 01-24-2013, 08:26 AM

I tell ya, it's really hard to go wrong with one of these. I've used it on drum/drum, disk/drum and disk/disk with a proportioning valve and it's pretty darn foolproof. Just be sure and bench bleed it WELL before installing. I had to open up the holed in the firewall just a tad and did not use the adapter plates.

http://www.jegs.com/i/JEGS-Performan...31403/10002/-1

hotrod 80 · 01-24-2013, 01:31 PM

Quote:

Originally Posted by Marv D

I tell ya, it's really hard to go wrong with one of these. I've used it on drum/drum, disk/drum and disk/disk with a proportioning valve and it's pretty darn foolproof. Just be sure and bench bleed it WELL before installing. I had to open up the holed in the firewall just a tad and did not use the adapter plates.

http://www.jegs.com/i/JEGS-Performan...31403/10002/-1

Sorry , busy night and all this info is on my computer at work . The Link Marv gave you is what i have minus the kit . I bought mine at the local auto parts and fabbed my own support plates .

hotrod 80 · 01-30-2013, 01:22 PM

Sorry for the delay , here is the info .
http://www.thebrakeman.com/valvetechii
http://www.dragracingonline.com/tech...ers-print.html
http://www.performanceonline.com/blo...e-pedal-ratio/

68racer · 01-31-2013, 06:18 PM

Thanks for that, lots of information. It looks like I am after a one inch bore master cylinder.

01-23-2013, 01:05 PM	#1
68racer Yeah baby! Join Date: Feb 2001 Location: United Kingdom Posts: 436	Manual Master Cylinder I know this has been covered before but I just want to check. I want to convert from power brakes to a manual, which bore size should I go for 3/4 or 1 inch? Also any reccommendations for which one to use? I may have a deal on a Wilwood 3/4 inch. Thanks, Neil. __________________ 11.37 @116

01-23-2013, 02:24 PM	#2
hotrod 80 mini truck racer Join Date: Aug 2006 Location: Baytown , texas Posts: 3,010	Re: Manual Master Cylinder It depends on what tye of brakes you have . I will post a few links for better info tonight . __________________ 1949 5-window 1969 Camaro 1976 Chevy Luv yellow 1978 Chevy Luv Blue 1976 Chevy Luv Black 1979 Firebird Flooded in Harvey 1999 F350 Dually 2005 GMC Sierra 4.8 RCSB 2014 Explorer (wifes) My build :http://67-72chevytrucks.com/vboard/s...d.php?t=399148 Build #2: http://67-72chevytrucks.com/vboard/s...d.php?t=653583

01-23-2013, 02:46 PM	#3
68racer Yeah baby! Join Date: Feb 2001 Location: United Kingdom Posts: 436	Re: Manual Master Cylinder Sorry forgot to say it is a '73 front clip with the HD discs, nine inch with drums on the back but I may put discs out there too. __________________ 11.37 @116

01-24-2013, 12:14 AM	#4
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,246	Re: Manual Master Cylinder Typically a manual master cylinder would have a 1" bore. __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE

01-24-2013, 08:26 AM	#5
Marv D Registered Truck Offender Join Date: May 2008 Location: hells training ground (aka Ariz) Posts: 3,118	Re: Manual Master Cylinder I tell ya, it's really hard to go wrong with one of these. I've used it on drum/drum, disk/drum and disk/disk with a proportioning valve and it's pretty darn foolproof. Just be sure and bench bleed it WELL before installing. I had to open up the holed in the firewall just a tad and did not use the adapter plates. http://www.jegs.com/i/JEGS-Performan...31403/10002/-1 __________________ Still playin with trucks, even at my age! When you're dead, it's only a problem for the people around you, because you don't know you're dead. .....It's kinda the same when your STUPID. I just did my taxes and reviewed my SS statement. Thanks to the current administration it looks like I will only have to work till noon on the day of my funeral.

01-30-2013, 01:22 PM	#7
hotrod 80 mini truck racer Join Date: Aug 2006 Location: Baytown , texas Posts: 3,010	Re: Manual Master Cylinder Sorry for the delay , here is the info . http://www.thebrakeman.com/valvetechii http://www.dragracingonline.com/tech...ers-print.html http://www.performanceonline.com/blo...e-pedal-ratio/ __________________ 1949 5-window 1969 Camaro 1976 Chevy Luv yellow 1978 Chevy Luv Blue 1976 Chevy Luv Black 1979 Firebird Flooded in Harvey 1999 F350 Dually 2005 GMC Sierra 4.8 RCSB 2014 Explorer (wifes) My build :http://67-72chevytrucks.com/vboard/s...d.php?t=399148 Build #2: http://67-72chevytrucks.com/vboard/s...d.php?t=653583

01-31-2013, 06:18 PM	#8
68racer Yeah baby! Join Date: Feb 2001 Location: United Kingdom Posts: 436	Re: Manual Master Cylinder Thanks for that, lots of information. It looks like I am after a one inch bore master cylinder. __________________ 11.37 @116



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