HOME MADE MASTER CYLINDER ADAPTER

-
WAYNE0

WAYNE0

Well-Known Member
Joined
Oct 16, 2019
Messages
817
Reaction score
797
Location
milton pa.
Between being impatient & not having the money right now i decided to make my own 4 to 2 master cylinder adapter. Not sure if it will work but we will find out.

MASTERCYLINDER BRACKET 001.JPG


MASTERCYLINDER BRACKET 002.JPG


MASTERCYLINDER BRACKET 003.JPG


MASTERCYLINDER BRACKET 004.JPG


MASTERCYLINDER BRACKET 005.JPG


MASTERCYLINDER BRACKET 006.JPG
 
Good job, you could sell those. If you made the offset adapters, you can even get more money.
 
Not sure what the offset adapters look like. Ill have to look them up. Now the only thing i noticed is the pedal is aot higher than before. Dr. Diff wants 35 for his. I dont think thats a bad price but the shipping might be. Thanks guys
 
WAYNE0 said:
Not sure what the offset adapters look like. Ill have to look them up. Now the only thing i noticed is the pedal is aot higher than before. Thanks guys
Click to expand...
That’s not a bad thing, I installed disc brakes on mine, and the pedal is a little lower.
 
Last edited:
Car Nut said:
That’s not a bad thing, I install disc brakes in mine, and the pedal is a little lower.
Click to expand...
Ill have to post a picture. The brake pedal is as a guess about 4-5 inches above the clutch pedal
 
What is your plate Wayne? 3/16"? I'm sure that's where the pedal difference is, but there's no reason why yours won't work, unless you just don't like the additional pedal height. I don't see how in the world it could affect operation.
 
I've got the AR Engineering adapter.(the one Dr Diff sells) Its designed so the stock pushrod can be reused. Any thicker/thinner and the pedal won't be at the proper height unless you use an adjustable pushrod. Is it a huge issue if the pedal isn't in the exact factory location...not sure. I guess that depends on the individual behind the wheel.

One thing that I did notice about the adapter is that it doesn't completely cover the firewall hole on my 68. The very top of the firewall cutout is exposed once the adapter is in place. With the gasket installed it's not noticeable but ideally the adapter should block the entire hole IMO. I might put some strip caulk on the back side so the gasket isn't the only thing over the hole.

Back when I bought mine, no adapter to master cylinder gasket was included. Now they sell them with the gasket. I think I'll talk with James at DMT about making me a gasket for mine since AR Engineering won't sell the gasket separately.
 
burdar said:
I've got the AR Engineering adapter.(the one Dr Diff sells) Its designed so the stock pushrod can be reused. Any thicker/thinner and the pedal won't be at the proper height unless you use an adjustable pushrod. Is it a huge issue if the pedal isn't in the exact factory location...not sure. I guess that depends on the individual behind the wheel.

One thing that I did notice about the adapter is that it doesn't completely cover the firewall hole on my 68. The very top of the firewall cutout is exposed once the adapter is in place. With the gasket installed it's not noticeable but ideally the adapter should block the entire hole IMO. I might put some strip caulk on the back side so the gasket isn't the only thing over the hole.

Back when I bought mine, no adapter to master cylinder gasket was included. Now they sell them with the gasket. I think I'll talk with James at DMT about making me a gasket for mine since AR Engineering won't sell the gasket separately.
Click to expand...
Is this with your reinforcement plate on the firewall?

1CFC75AD-4639-4E53-8975-20C11AB61E84.jpeg
2298A68C-9BF0-4FAE-8B93-04D74F0D81E8.jpeg
 
For folks interested, here's some dimensions you could use to make your own. I ended up making mine a smidge taller to completely clear the hole in the firewall.

6412648-mastercylinderadapter.jpg
 
RustyRatRod said:
What is your plate Wayne? 3/16"? I'm sure that's where the pedal difference is, but there's no reason why yours won't work, unless you just don't like the additional pedal height. I don't see how in the world it could affect operation.
Click to expand...
its 1/4 in it pushes really nice not worried about the height just looks really high compared to the clutch pedal
 
burdar said:
I've got the AR Engineering adapter.(the one Dr Diff sells) Its designed so the stock pushrod can be reused. Any thicker/thinner and the pedal won't be at the proper height unless you use an adjustable pushrod. Is it a huge issue if the pedal isn't in the exact factory location...not sure. I guess that depends on the individual behind the wheel.

One thing that I did notice about the adapter is that it doesn't completely cover the firewall hole on my 68. The very top of the firewall cutout is exposed once the adapter is in place. With the gasket installed it's not noticeable but ideally the adapter should block the entire hole IMO. I might put some strip caulk on the back side so the gasket isn't the only thing over the hole.

Back when I bought mine, no adapter to master cylinder gasket was included. Now they sell them with the gasket. I think I'll talk with James at DMT about making me a gasket for mine since AR Engineering won't sell the gasket separately.
Click to expand...
yea i made mine to cover it & ran out of gasket material so i just put a bead of caulking on the back side
 
here is the difference between the clutch & brake pedal looks worse in person

BRAKE PEDAL HEIGHT 001.JPG
 
WAYNE0 said:
if im right the reinforcement was for power brakes ive never seen one with it for a car with manual brakes
Click to expand...
I’m wondering now if it’s just on B bodies that have the reinforcement plate for manual brakes. See the eBay listings below of pictures of both power and manual plates.

173D12D3-C84F-4727-9E88-7CECCFD8C665.jpeg
 
You must log in or register to reply here.
-

Back
Top