Brake Master Option for early FJ40

[fireflyr]

Poser clued me in on this and I thought I'd pass it on. For folks with the single circuit, unboosted Master Cylinder that want to upgrade to a dual circuit (I'm starting a 4 wheel disc conversion) without the added expense of sourcing a booster:

Man A Fre sells a Wilwood master with an adapter. It isn't listed on their website and is pretty close to a bolt on conversion. I don't have the invoice with me but the same master is available from Jegs.

I had to modify the original plunger rod to fit.

The master clears the firewall without cutting the vertical support (?) and also clears my Weber 32/36.

 

[tyama]

Very interesting! How hard do you think the braking will be w/o a booster? Please post up a part # when you get the chance. Thanks! ty

 

[destin]

nice man!!!

Yeha i am gonna update my brakes down the line too
Single circuit is just an accident waiting to happen

Disc conversion would be awesome too
I did a small stream crossing last month and holy mud/ clay in the drums haha

Was a bit scary the first time I had to stop

Great work man!

 

[baja1d]

I'm very happy with my Geo conversion. Got the idea from Dallas: https://forum.ih8mud.com/fj45-owner...nd-restoration-info-thread-7.html#post3988272. Here's my thread: https://forum.ih8mud.com/fj25-owners-group/426386-brake-booster.html. I also used an adapter from JtOutfitters and did not have to cut my fire wall. Did have to slightly modify the adapter to fit the Geo but it was under $100 for the brake booster, adapter, and new brake lines. I can post some pictures if you would like, just let me know.

 

[RED47]

wish i had that info before i rebuilt my mates 75 fj45, had to cut the vertical fire wall support and make new/bigger holes for the booster...and grind away some of the clutch master body!
cheers for the info

 

[2fpower]

have you started the disk conversion yet? How does the unboosted master work with disks?

 

[2fpower]

Just wanted to post up that I did the geo metro master conversion with the help of dmaddox, and everything fit great. For pics, look at my build post 488

https://forum.ih8mud.com/ks-mo-tornado-alley-cruisers/340130-ol-blue-my-68-fj40-project-25.html

 

[65swb45]

There is also an adapter available for the Toyota dual circuit master cylinder:

https://forum.ih8mud.com/sale-parts/487774-tandem-master-cylinder-adapter-early-fj40s-fj45s.html