Pedal Box - Boosterless conversion

[spuriouspseudo]

Hey team! getting ready to do a boosterless conversion on my '68.

 

I was able to scrape the ATE database of all the master cylinders that were close to my original:  Goal was to find a few options of sizing with the same mounting features, in case my choice doesn't work out.  My original has a bolt spacing of 60mm and a bore of 20.6; my goal was to find as close as possible in a 19mm bore, with the option of 17mm if that doesn't work out; even changing back to the 20.6, for that matter.

 

 

Article Number	Article Number short	L	FL	D	A	X	Diam. 1
03-2117-3611-3	10043	173	31	35	60	0	17.5
24-2117-1503-3	10400	176.5	10.5	34	70	22.3	17.5
03-2119-6713-3	10061	154	42.5	42	60	0	19.1
03-2119-0525-3	10046	162.5	18.8	42	60	0	19.1
03-2119-6207-3	10060	162.5	18.8	42	60	0	19.1
03-2119-8911-3	10066	166.9	29.5	42	60	45	19.1
03-2119-9011-3	10067	166.9	29.5	42	60	45	19.1
03-2119-9111-3	10068	167	29.5	42	60	45	19.1
03-2119-0781-3	10052	178	10	34	70	20	19.1
03-2119-0661-3	10049	179	10	34	70	17.3	19.1

 

Ended up choosing the 03-2119-8911-3; 10066.  Sourced from Rock Auto: https://www.rockauto.com/en/moreinfo.php?pk=309072&cc=1284173&jsn=934

 

Looks to be from a Karman Ghia or Bug....

 

Anyway, here's me taking out the pedal box:

 

 

[2002iii]

Have you seen this.

[robspeed]

Heh I was just watching your video on YT...

[pd_55]

Has anyone done the Chase Bays delete? I saw it during research, but haven't heard of anyone using it.

 

[uai]

I‘d just use an early boosterless pedal box. 

[NickVyse]

2 hours ago, uai said:

I‘d just use an early boosterless pedal box. 

 

Probably easier just to replicate the MC attachment on the early box as I think they all came with the mechanical clutch - so would require changing to a hydraulic clutch anyway.

[spuriouspseudo]

21 hours ago, 2002iii said:

Have you seen this.

 

17 hours ago, pd_55 said:

Has anyone done the Chase Bays delete?

To me it looks like the Chase Bays unit mounts to the upper assembly of the '02, so not directly to the pedal box...  Plus, it doesn't look like it has dual outlet, so no redundancy - I could be wrong on that.

 

Would be neat to use two of those Wilwood compact units and see if they would fit with a balance bar, but that's out of my project scope.

 

 

[NickVyse]

If you're changing to no servo I don't see the point in keeping the redundant, heavy and space consuming metal work.

[TobyB]

I couldn't get 3 masters to align with the pedals on the box, 

for a balance bar, so I ended up remoting the clutch master.

 

One of the problems with the 2002 brake system in general

is that the pedal ratio is only 1:4, cuz the darned things are 

so short.

 

t

 

[kbmb02]

29 minutes ago, TobyB said:

One of the problems with the 2002 brake system in general

is that the pedal ratio is only 1:4, cuz the darned things are 

so short.

 

+1 

I’ve got one where we direct-mounted a single master to the (modified) pedal box, changed the ratio a little ... stronger right leg required. -KB

[Shawn Piper]

Not sure, but this thread might be useful for your build

 

 

[spuriouspseudo]

On 1/3/2021 at 5:53 AM, NickVyse said:

If you're changing to no servo I don't see the point in keeping the redundant, heavy and space consuming metal work.

For sure, that's the plan!

 

On 1/3/2021 at 11:45 PM, Shawn Piper said:

Not sure, but this thread might be useful for your build

 

Awesome, thanks for posting that - I swear I've been all over the FAQ digging for info, but didn't see that one.

 

On 1/3/2021 at 12:46 PM, TobyB said:

so I ended up remoting the clutch master

 

Interesting - I think that I can fit the MCs that I've picked - hopefully I can get a mockup going this weekend.  All of my parts are in!

[spuriouspseudo]

Made some progress on the conversion this week:

 

 

Edited February 15, 2021 by spuriouspseudo

[TobyB]

Since Ken asked a while back, here's what I currently have.

 

t

[spuriouspseudo]

48 minutes ago, TobyB said:

here's what I currently have

Man, that's pretty sweet.  Love the tilt on the clutch - any issues with that orientation?