51 Chevy truck brake questions. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

CruzByU · 06-20-2013, 09:10 AM

I'm working on my 51 Chevy 3100. I plan on keeping the 235 6-banger, and mating up a mid 80's T-5 Borg Warner to it. I'm also swapping the rear end out for a 4x4 unit from an S-10. I want to upgrade to power brakes with dual master cyl. I'm quessing the new power boosters run off of vacuum, and will my 235 have enough to operate it? I looked at the power brake boosters already on the web and some says they can only be used with automatic transmissions, why would that be, pedal configuration under the floor? Any thoughts fellers?

dan42 · 06-20-2013, 09:42 AM

Pictures of the rig are required. Too many guys that relate visually.
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mknittle · 06-20-2013, 10:33 AM

"Pedal configuration under the floor"? That's what I would say. There aresome guys that mounted the booster/master cylinder farther back. As far as behind the cab. that would buy some room for the clutch linkage.

Trekster · 06-20-2013, 10:43 AM

Your 235 will have plenty of vacuum for the power booster.

A lot of the under floor brake brackets are built for an automatic because the bracket itself is built in such a way that the clutch pedal mount is eliminated. I guess that the after market guys think most people will put an automatic in.

CruzByU · 06-20-2013, 11:56 AM

Thanks for the replies. I quess I get to do a little fab work, cause I shifting me some damn gears!

lazypineapple · 06-20-2013, 01:54 PM

Check with CPP
http://www.classicperform.com/Instru...rakeClutch.htm

nvrdone · 06-20-2013, 02:13 PM

Who says you can't have power brakes with a manual trans ? I have a 327 / m21 with power drum brakes front and rear.
I used a bracket from no limit - pn -pbc 47 with a 79 mustang booster and m/c. I did have to use a 10# check valve in the front. The stock clutch and brake pedals work good along with the stock manual clutch linkage. The only clearance issue was the cross member under the rear of the trans. I had to use a tube mount instead of the stock square mount.
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Trekster · 06-20-2013, 03:29 PM

I built my own bracket and put a booster under the floor. I made it so it bolted to the original bracket that held the old master cylinder.

CruzByU · 06-20-2013, 04:34 PM

Good info guys, I'm gonna check out the CCP website, looks like it could be the way to go. Thanks.

solidaxel · 06-20-2013, 04:54 PM

Might want to take a look at ECI, engineered components inc

06-20-2013, 09:10 AM	#1
CruzByU Registered User Join Date: Dec 2009 Location: Tuscaloosa, Alabama Posts: 3	51 Chevy truck brake questions. I'm working on my 51 Chevy 3100. I plan on keeping the 235 6-banger, and mating up a mid 80's T-5 Borg Warner to it. I'm also swapping the rear end out for a 4x4 unit from an S-10. I want to upgrade to power brakes with dual master cyl. I'm quessing the new power boosters run off of vacuum, and will my 235 have enough to operate it? I looked at the power brake boosters already on the web and some says they can only be used with automatic transmissions, why would that be, pedal configuration under the floor? Any thoughts fellers?

06-20-2013, 09:42 AM	#2
dan42 Registered User Join Date: Feb 2007 Location: Cali Central Coast Posts: 5,191	Re: 51 Chevy truck brake questions. Pictures of the rig are required. Too many guys that relate visually. Posted via Mobile Device Posted via Mobile Device __________________ '67 SWB Fleetside ZZ4/350/Tremec 5-speed/4link/Scott's IFS - and fun as heck! SOLD Click here to support the board Philippians 4: 6-7

06-20-2013, 10:33 AM	#3
mknittle Registered User Join Date: Jul 2011 Location: Auburn ca. Posts: 2,886	Re: 51 Chevy truck brake questions. "Pedal configuration under the floor"? That's what I would say. There aresome guys that mounted the booster/master cylinder farther back. As far as behind the cab. that would buy some room for the clutch linkage. __________________ Mark My GMC build. http://67-72chevytrucks.com/vboard/s...d.php?t=536602

06-20-2013, 10:43 AM	#4
Trekster Registered User Join Date: Feb 2012 Location: Brigham City Utah Posts: 157	Re: 51 Chevy truck brake questions. Your 235 will have plenty of vacuum for the power booster. A lot of the under floor brake brackets are built for an automatic because the bracket itself is built in such a way that the clutch pedal mount is eliminated. I guess that the after market guys think most people will put an automatic in.

06-20-2013, 11:56 AM	#5
CruzByU Registered User Join Date: Dec 2009 Location: Tuscaloosa, Alabama Posts: 3	Re: 51 Chevy truck brake questions. Thanks for the replies. I quess I get to do a little fab work, cause I shifting me some damn gears!

06-20-2013, 01:54 PM	#6
lazypineapple Registered User Join Date: Apr 2010 Location: Granbury ,TX Posts: 268	Re: 51 Chevy truck brake questions. Check with CPP http://www.classicperform.com/Instru...rakeClutch.htm

06-20-2013, 02:13 PM	#7
nvrdone Registered User Join Date: Dec 2011 Location: Moxee WA Posts: 1,482	Re: 51 Chevy truck brake questions. Who says you can't have power brakes with a manual trans ? I have a 327 / m21 with power drum brakes front and rear. I used a bracket from no limit - pn -pbc 47 with a 79 mustang booster and m/c. I did have to use a 10# check valve in the front. The stock clutch and brake pedals work good along with the stock manual clutch linkage. The only clearance issue was the cross member under the rear of the trans. I had to use a tube mount instead of the stock square mount. Posted via Mobile Device

06-20-2013, 03:29 PM	#8
Trekster Registered User Join Date: Feb 2012 Location: Brigham City Utah Posts: 157	Re: 51 Chevy truck brake questions. I built my own bracket and put a booster under the floor. I made it so it bolted to the original bracket that held the old master cylinder. Attached Images

06-20-2013, 04:34 PM	#9
CruzByU Registered User Join Date: Dec 2009 Location: Tuscaloosa, Alabama Posts: 3	Re: 51 Chevy truck brake questions. Good info guys, I'm gonna check out the CCP website, looks like it could be the way to go. Thanks.

06-20-2013, 04:54 PM	#10
solidaxel Registered User Join Date: Dec 2002 Location: Cactus Patch So. Az Posts: 4,749	Re: 51 Chevy truck brake questions. Might want to take a look at ECI, engineered components inc __________________ 53 TuTone Extended Cab 350 4-Spd 3:08 (SOLD) 53 Chevy Moldy pearl green ZZ-4 4L60E 9" 3:25 55 GMC 1st Black Mll (ZZ4) ZZ6 TKO 600 5 sp 3:73 62 Solidaxle Corvette Roman Red (327 340hp 4spd 3:36) C4 & C5 suspension tube chassis LS 3 4L70E 65 Corvette Coupe 327 350hp 4spd 4:11 78 Black Silverado SWB (350/350) 5.3 & 4L60E 3:42 2000 S-Type 3.0 (wife cruiser) 2003 GMC SCSB 5.3 4L60E 3:42



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