Master Cylinder for Manual Front Disc Brakes??

[horseballz]

Please Help,
Does anyone know the correct master from a 74 Maverick to use for manual front disc brakes? I'm finding a lot of conflicting info. After market parts suppliers list crazy stuff like, rear disc or they don't specify drum or disc for the manual but they do specify drum or disc for power brakes!?!? Local Ford dealer that still has microfiche says that the same master is listed for manual drum AND disc . Would that mean that on the 74 Maverick, it would have an external residual valve for the drum brakes to allow the use of the same master for drum and disc? Summit lists a Dorman number that specifies manual disc, but when I check Dorman's site the number is listed for manual drum and they show a different number for manual disc. I just want to get the right master the FIRST time, without ending up with 3 or 4 Masters that I can't return/use. If anyone can help, it would be greatly appreciated.
Thanks a Bunch,
Gene

 

[DanMan68]

Master Cylinder problems

I don't know why you are wasting your time looking for a master cyl. Mustangs came with manual disc fronts and that master cyl. is available at any real parts store. No modifications to firewall or brake lines necessary.

 

[2+2GT]

If you are driving a car converted to disc but without power boost, tell the counterman you need a cylinder for a "1974 Maverick V8 with manual disc brakes".

Anyplace that tells you disc and drum use the same master are idiots and you should leave. They don't even have to know anything about Fords to know that. Drum/drum and disc/drum have different size reservoirs and valving.

 

[horseballz]

DanMan68,
I apologize, I forgot to specify that this is for a 68 Mustang that did NOT come with manual disc brakes. I am doing a conversion to discs and do not want to use a power booster.
Thanx,
Gene

 

[JonK]

I usually use catalog searches like rockauto.com, oreillysauto.com, raybestos.com to find part numbers. Looks like Raybestos MC36251 might be what you're looking for, supposed to be for a '67 Cougar front disc/rear drum nonpower, I think it came on base models too. I'm sure that most that got the front disc option back in the 60's opted for the power also, looks like they slowly eliminated the nonpower option.

From rockauto:
RAYBESTOS Part # MC36251 {Professional Grade; Bore Size=1" Number of Ports=2 Primary Outlet Size=1/2x20 Secondary Outlet Size=3/8x24}
Front Disc Brakes; Rear Drum Brakes; Manual Brakes

The main things to look for are that the bowl for the disc brakes is larger than the drums, usually the front is the rear bowl. Also the pushrod length will be different pwr/non. I would imagine you would use the distribution valve for a front disc/ rear drum car, shouldn't make a diff. to the valve whether there is power vacuum or not. I used a new aftermarket dist. valve/prop valve in one by SSBC/Summit so I can adjust my rears if needed.

Wilwood also makes a nice one now for ~$60, wish this was out when I bought my Summit one as it's cheaper and looks more stock.
Wilwood Disc Brakes 260-11179 - Wilwood Brake Proportioning Valves - Overview - SummitRacing.com

Jon

 

[phutch11]

Which conversion kit did you use? The design of the caliper will matter with MC selection.

 

[horseballz]

JonK,
Yeah, I use those online catalogues too, usually cskauto. Check that CSK for a 1974 Maverick to view an example of the confusion, they even have a listing for rear disc. I know/understand what I want/need but the listings are lacking details. Yes, it does appear that the one for a 67 Cougar is good and that number is even listed for 67 & 68 Mustang but does not specify in the Mustang listings whether or not it's power or disc. And the info that the guys at the counters/phones have is no more detailed than what we see.

phutch11,
All OEM 68 spindles, calipers and brackets.

2+2GT,
Yep, I agree wholeheartedly, however, many of the re-man masters , even the ones listed for drums, have the different sized reservoirs, and with the lack of automotive knowledge at parts counters these days (the folks who write the listings/ details are certainly no better), we as hot rodders/classic enthusiasts/consumers need to be super vigilant/diligent at checking/double checking that some idiot isn't giving us the wrong parts! By the way, the info that the same master was used for drum and disc came from an older guy at a Ford dealer that actually still has the old microfiche catalogues. He said that it didn't sound right to him, but thats what the "fiche" was telling him. I suppose it's possible that Ford did something goofy? Like switching to using a disc master on drums with an external residual valve?

DanMan68,
I stand corrected and my apologies. It appears that manual discs WERE available in 68, except nobody seems to list the parts correctly! And, by the way, what's a "real parts store"? Oh, yeah, thats one of those "few" things that disappeared about the same time as workers taking pride, responsibility and accountability in what they do. I'm sorry, I'll come down off of my soapbox now.:stirpot:
Thanks All,
Gene

P.S. I finally found what I needed (I think/hope)- Cardone BPR 20-1588

 

[chockostang]

I usually use catalog searches like rockauto.com, oreillysauto.com, raybestos.com to find part numbers. Looks like Raybestos MC36251 might be what you're looking for, supposed to be for a '67 Cougar front disc/rear drum nonpower, I think it came on base models too. I'm sure that most that got the front disc option back in the 60's opted for the power also, looks like they slowly eliminated the nonpower option.

From rockauto:
RAYBESTOS Part # MC36251 {Professional Grade; Bore Size=1" Number of Ports=2 Primary Outlet Size=1/2x20 Secondary Outlet Size=3/8x24}
Front Disc Brakes; Rear Drum Brakes; Manual Brakes

The main things to look for are that the bowl for the disc brakes is larger than the drums, usually the front is the rear bowl. Also the pushrod length will be different pwr/non. I would imagine you would use the distribution valve for a front disc/ rear drum car, shouldn't make a diff. to the valve whether there is power vacuum or not. I used a new aftermarket dist. valve/prop valve in one by SSBC/Summit so I can adjust my rears if needed.

Wilwood also makes a nice one now for ~$60, wish this was out when I bought my Summit one as it's cheaper and looks more stock.
Wilwood Disc Brakes 260-11179 - Wilwood Brake Proportioning Valves - Overview - SummitRacing.com

Jon

Exactly right!!!

And, there were no Disc Brakes 67---Up that were Manual, no Booster, None.

Disc Front, Drum Rear, Disc Front Disc Rear, So on is solely dependant upon the INTERNAL residual valves.

If a Large hole in Master--Residual, if a small hole, No Residual.

Reason you can equate this, and as explained by the Folks at Raybestos factory, " we have to machine the hole out larger to insert the Valve" Dam it makes a bit of Logic, doesn't it.

Dan @

Chockostang

 

[nitroracer]

When I converted my 68' from manual drum to manual front disc I was working at a parts store and searched through the specs on a bunch of master cylinders. I settled on one from an 83' Ford Ranger 2.3L 4x4, with manual brakes. It is aluminum with a 15/16" bore and the ports face away from the engine just like the original.

 

[TeamEntity]

im going to have to agree with 2+2 on this one. and i believe it will come with the adjustable arm along with that master.