Re: Power to manual disk brakes?
[Re: CoDart]
#1104386
10/31/11 01:19 AM
10/31/11 01:19 AM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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what make/model/yr. Yes you'll need a manual brake pushrod and check that the M/C you select has a shallow machined recess in the rear tapered opening of the piston for the rubber retainer (a snip of vac hose works fine)to lock into. It cant be smooth tapered like the inside of a thimble. Yes you can carefully bend the lines & maintain some of the loop and check M/C port diameters against the male inverted flare fittings on your lines for a matchup
live every 24 hour block of time like it's your last day on earth
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Re: Power to manual disk brakes?
[Re: RapidRobert]
#1104387
10/31/11 01:25 AM
10/31/11 01:25 AM
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Joined: Nov 2009
Posts: 2,177 ill
dennismopar73
top fuel
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top fuel
Joined: Nov 2009
Posts: 2,177
ill
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new master cyl comes with the little rubber end, as for the rod , we used the stock one off the power brake and re-cut it on the middle put a turning nut on it and 2 lock nuts, made it adjustable you don't we did , well as for lines , need 1 adaptor , we re flaired mine so it looks like it was made for the car good luck hope it helps dennis
Last edited by dennismopar73; 10/31/11 01:27 AM.
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Re: Power to manual disk brakes?
[Re: CoDart]
#1104388
10/31/11 02:30 AM
10/31/11 02:30 AM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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Are you having a prob with the current power setup or just wanting more pedal feel or to lose the weight?
live every 24 hour block of time like it's your last day on earth
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Re: Power to manual disk brakes?
[Re: POS Dakota]
#1104391
10/31/11 07:05 PM
10/31/11 07:05 PM
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Joined: Dec 2007
Posts: 10,542 BROOK PARK, OH
WILD BILL
Senior Member of the Junior Dragster Club
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Senior Member of the Junior Dragster Club
Joined: Dec 2007
Posts: 10,542
BROOK PARK, OH
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Check you pedal linkage as some cars like My wife's 72 Charger have a pedal reduction linkage and don't work very well when you simply take the booster away.
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Re: Power to manual disk brakes?
[Re: CoDart]
#1104392
10/31/11 08:40 PM
10/31/11 08:40 PM
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Joined: Jul 2007
Posts: 863 Pinelands , NJ
joelson6
super stock
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super stock
Joined: Jul 2007
Posts: 863
Pinelands , NJ
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i did it on my '74 Challenger. took the booster and MC off. you need to get a manual brake firewall plate. i got the manual MC from advance auto parts. they were so cheap i bought 3. got the adjustable push rod from MP Brakes, cheap, easy, fits perfect. put it together and bleed it.
Last edited by joelson6; 10/31/11 08:47 PM.
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Re: Power to manual disk brakes?
[Re: POS Dakota]
#1104393
10/31/11 09:20 PM
10/31/11 09:20 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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You want a manual brake pushrod and I have 2 and they are significantly different lengths and I dont know what they come off of. You could get one from the parts for sale section here probably for cheap but it'd take some time or a local JY would be faster. Could order the MP adjustable one but it'd take time and it is pricey. If your handy with taps/dies you could mod your PB one as mentioned earlier (which I have not done) if you are OK with losing a piece of your complete PB setup. Not sure of the ideal "perfect pedal effort feel" diameter but I have a similar setup to yours with a 1&1/8" M/C which is supposed to have too much pedal effortand the pedal effort is not excessive and I'm not that strong. Just confirm that your M/C choice has the machined wide shallow groove in the rear piston cavity just not smooth tapered like a thimble. The adapter plate is available commercially but is pricey and you can get a plate of aluminum and the bolt hole dimentions are in the archives and a countersink bit for the 2 holes in it for the alum M/C. Alum M/C's can have different piston position in relation to the flange than an iron one and or the flange is not the same thickness so I like to mockup the M/C/pushrod and select a plate of the right thickness to work with to set the pedal height right where I want it. On 4 wheel discs, calipers on all 4 corners take much more vol than 2 calipers/2 miniscule drum wheel cyls so I'd think the largest bore (1&1/8") M/C available. There is a thread with bore sizes of common OE alum M/C's & I tried to load it but it says I need a zpeg or some BS so here is the # on it if that is enough to let you retrieve it #6818302
live every 24 hour block of time like it's your last day on earth
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Re: Power to manual disk brakes?
[Re: CoDart]
#1104395
11/01/11 01:05 AM
11/01/11 01:05 AM
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Joined: Sep 2003
Posts: 1,168 Vancouver, WA
MoparMarq
super stock
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super stock
Joined: Sep 2003
Posts: 1,168
Vancouver, WA
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Quote:
Do I really need a adapter plate? Because since the master cylinder has 4 bolt holes and the fire wall has 4 bolts sticking out, cant these just go together or are the patterns different?
It's not that the patterns are different. It's that the PB booster assembly covers up a fairly large opening in the firewall that the base of the manual M/C doesn't cover. The reinforcement plate is of pretty heavy gauge metal and allows for the covering of the opening that would exist if it wasn't there.
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Re: Power to manual disk brakes?
[Re: CoDart]
#1104397
11/01/11 01:54 AM
11/01/11 01:54 AM
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Joined: Sep 2003
Posts: 1,168 Vancouver, WA
MoparMarq
super stock
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super stock
Joined: Sep 2003
Posts: 1,168
Vancouver, WA
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Although I think that bracket MIGHT work, I don't think it really is the right one. There is another bracket that AR Engineering makes which is better. The adapter has studs that go through the firewall and for the m/c, which make it much easier to install. Frankly, it looks better also. Not sure who sells it, but the guy to talk to is Dr. Diff on this board. Perhaps he'll chime in.
Also, he can tell you, based on what you have and what you want, what bore diameter m/c would be best for your application.
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Re: Power to manual disk brakes?
[Re: MoparMarq]
#1104398
11/01/11 07:50 AM
11/01/11 07:50 AM
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Joined: Nov 2009
Posts: 2,177 ill
dennismopar73
top fuel
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top fuel
Joined: Nov 2009
Posts: 2,177
ill
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http://shop.advanceautoparts.com/webapp/..._755201714____# this is the master cylinder i use, the adaptor if you wish to buy one,, they are all over the net, or just make one, that's what we did, why spend money when you most likley have all you need at home j m o this is one of the most easy jobs on the car,
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Re: Power to manual disk brakes?
[Re: dennismopar73]
#1104399
11/01/11 10:28 AM
11/01/11 10:28 AM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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Never undid PB's so forgot about the large firewall opening so if it has that I believe you'll need the OE plate (or fab a similar one) to cover that then the aforementioned 4 to 2 adapter. If Summitt confirms that that M/C has the shallow groove for the manual brake pushrod neoprene retainer to lock into it'll work for you. If the firewall opening is covered and the M/C mounted with the right adapter you're (pretty much) good to go
live every 24 hour block of time like it's your last day on earth
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