I'm in for an Alu with a 23 mm master

I'll stick with Chris's design, but nice work Mark!

I'm interestred too. Le tme know when it's time to send the money...

Harvey

I'm worried about a front end collision. This brace would transfer the force from the crossmember directly into the pedal cluster. This mod could be a ankle breaker for the unfortunate people that happen to get in an accident.

Man, I asked for this thing yesterday and did not send any money and when I got home from work it was not installed on my car.

I'd like one .

I would like one, preferably with the plating option, if price is in the vicinity of $60...
Thanks,
Nate

Status?

I'm in for one.

In for two...

The way I see it, yes. When the bolt is tightened it puts force at the red arrow (in pic below) and pushes against the crossmember sufficient that the brace and master cylinder effectively become as one piece. The next force is downward at the green arrow which is blocked by the crossmember.

It would be interesting to have a stress lab that could put enough force on this setup to break something and see what gives first. At that point, I think it very likely would be the shorter bottom hook on the MC and it would indeed rotate off the crossmember. But this application in the car will never approach that amount of force.

Mark,

I am in for one. Sorry for the late response, but I have been away from the site for a while. Thanks.

I might be able to get the 50 I have assembled next week. Then they have to go out for plating.

What ever happened to these? I could not find anything on your web site.

Thanks

David

Haven't searched (on my phone) yet but there's a thread on another brace that attaches to the MC with round screw down clamps. Seems like it was 'T' shaped. This is a good idea

Please make one for those of us that have swap out the crossmember to the alum version and 23 mm master. Then count me in for one.
Thanks!

Eric and I have been working to get a bunch of these together, but it's taken both of us awhile to get it going. Hopefully soon.

Good old ebay
http://www.ebay.com/itm/Master-Cylinder-Br...c02&vxp=mtr

There ya go.

One of them needs to go on my car for testing...

Bulkhead flex is the reason that the master cylinder moves.
The mounting bolts of the mc are horizontally co-planer. The force applied is
trying to wrap the wall around the centerline of the bolt heads.
~
Adding an inboard and outboard .12in steel doubler plate, with the outboard plate
covering a larger portion of surface area, would eliminate the flex as well.
Especially if you add a radial interface, mid-length of the mc, gussetted thirty
degrees rearward and secured by two through bolts, mirroring the spacing
of the mc mounting bolts and offset below.
Form could be a conical cut, or a 30x by 30-y delta with counterbore spotfaces.
~
Just a thought...

For me, it seems like right at the edge of even fitting. No screw, and
it needed to be pretty much hammered in there. I don't think there is
any adjustment in the way that the way that the tube is mounted either.

Click to view attachment

That was pretty much the way i was thinking of going. Except i wasnt thinking as well. I like it, because that directly solves the basic problem.

Mark S. that's okay. Tight is good. Each car is a little different.

Mark, your car is toast.....what with all the paint work and scratches...
Looks like your brakes are now junk.
Just sell it to me, it's time

I wouldn't want do deprive you of all the future second place finishes.

Nate, Ken, John... shipped.

Thanks! Happy New Year Gang!

Any news for those that have switched to an aluminum member? I have and would love to purchase an updated support for mine. Thanks

nice reply.

Take a pic of the backside of the chassis right where the master cylinder mounts.
I wonder if that might be push outwards???

rich

I don't think there is any problem with that area. Here's pics:
Click to view attachment
Click to view attachment

That 3.6 project we have in house has an aluminum support. I'll look at it next time it's up on the lift. The problem is, the 911 and the 914 already fit differently. I fear the alloy support market for 914's is rather limited.

Yup. Once I have one here in the shop I could think about it. But it's a really small market.

Me! Me!

I love the simplicity of this design and can't believe I missed this (until now).

Why is the bottom "jaw" so short though? I know this is jammed in between the front crossmember and master cylinder, but it looks like there is only 1-2mm holding on to the tip of the master cylinder.

Would a short extension be beneficial? What am I missing?

Click to view attachment

Yup, it looks stock...

It's not too short. It only takes so much to do the job. The extension would be excess and waste.

Old thread but thought I might put in my 0.2 cents,what the hell.
All said and done I like your solution....as an engineer I can see how it works without question.
Alloy member ..oh I see,someone mentioned them flexing ,the shape of the casting it shouldn't do that ,yes I have one (alloy member),I think the important thing is to use the metal support straps on both side which in the 911 is also a sway bar mount.
I will fabricate a set from 20x6 steel flat bar I have and then come up with a clever plan to support the MS better,yep mine moves

Did these ever make production?

Tangerine Racing made up one. Check website

I gave Eric @ PMB the design to run with, but I'm not sure if he ever made another run of them, or if he still has some in stock.

If he's not interested in building more, I can see about another run. But it's Eric's choice first.

They seem to be available on E-bay:
PMB Mastercylinder brace

Jim

COOL !

Does the splash guard have to be modified to fit it??