Searched. Lots of threads about using the Mazda 929 (1" bore) master cylinder on FDs and FCs, but no info on using them in first gens. Anyone done it?

 

Brake or clutch?......

 

Brake...

My local yard has three in stock. I'm thinking I might go pull the MC/booster off one and give it a shot. If it doesn't fit, I'm only out $20.

 

Dood ^^^ seriously? <- meant for XLR8


another edit... got lost in my own thoughts

If the connections are the same f/r and the mounting holes are good it should work fine. Just will be a little stiffer pedal due to less travel needed, pushing a greater about of fluid for a given stroke.

 

......What?
I havn't owned an FC for many years, and don't visit their forum, so how would I know what Duck is talking about. I know he has a heavy clutch setup and I didn't want to presume anything.......Okay, cool.

Sounds like it's worth a shot. Keep us updated.

Good luck.

 

Really shouldnt be needed for a car with 4 single piston calipers.
The FC and FD's benefit from them because they have 4 piston calipers up front and a lot more weight to stop than a 1st gen.
For what its worth,I have a TII master and booster in my 84 along with TII front calipers and SE rears.It stops like a brick wall with very little effort or pedal travel.I wouldnt consider going larger neccesary,even though I have bigger brakes than an SE, and a smaller M/C than the 929.The stock 1st gen brakes with the big 929 M/C is gonna be touchy and probably hard to modulate.
Also,the 5 lug FC M/C is probably cheaper and easier to find at the parts houses than the 929.....junkyard brake hydraulic parts are taboo in my book.

 

And why in hell would you wanna use a junkyard brake line when a 5ft 3/16 brake line is less than $10 plus every vehicle has a different design. The brake fittings (thread pitch) are common but there is also nothing wrong with using junkyard brake inlet fittings (pocket items) as long as you use a flared wrench or the right tools. As long as you have a bender, tubing cutter and double flare, anything is possible with an open mind.

Im using a RWD GLC 1" MC in my 73 RX-3 with no valve/bias for rear brake (converted to 81-85 disc brakes)

 

You're making a lot of assumptions about my setup...





Behold! FC hub/4-pot caliper swap, and Ford 8.8 with 4-pot Aerospace brakes.

As far as weight is concerned, I'm pushing around about as much weight as a some FC's.

I've actually have a TII master cylinder in the car, it's just not enough volume to push 4-piston calipers all the way around. I am experiencing an unacceptable amount of travel in the brake pedal. I understand DirectFreak had the same problem I had, and chose to resolve it by replacing the rear brakes with smaller units. I intend to solve the problem by using a larger master cylinder.

I have no intention of using junkyard parts on my car, but I'm not going to shell out nearly $300 for a new master cylinder and booster with no clue if they fit. Since no one has apparently tried this before (or at least no has posted it), I will attempt to adapt junkyard parts first. If they fit, I'll use them as cores on new parts and post a how-to. If not, I'm out $20.

Further reading: https://www.rx7club.com/1st-generation-specific-1979-1985-18/pics-half-bridge-rew-62-1-bound-my-se-648276/

 

I know it sounds weird but I used a Isuzu Rodeo two stage master with the Isuzu booster. I have the 7's only kit which has large (bigger than a TII I think) four pot calipers. There is a thread I made a long time ago for it. Let me see If I can find it.

 

Here is the link: https://www.rx7club.com/1st-generation-specific-1979-1985-18/ultimate-1st-gen-brakes-teaser-pix-416794/

Your set up looks very nice. I love the 8.8 rear end that is going to be bad A$$.

 

Just so you know - I DO have the 929 Master cylinder installed, and run TII brakes up front and 2-piston Aerospace in the rear. Still WAYYYY too much pedal travel. The real solution would be to move the "pivot" point on the brake pedal.

I am swapping to Stock TII rear brakes as soon as I can, that way I can also keep my Parking Brake.

 

Very good to know. So did you have to use the 929 booster as well?

Maybe I should check out the Isuzu master cylinder.

 

Interesting stuff, especially because i'm going to be looking for a solution for this as well soon. TII 4 pot fronts, 4 pot wilwood rears.

 

i honestly dont see why you guys want 4 pistons on the rear. with all T2 brakes, good pads, and good rotors all around youll have MORE than enough stopping power than you need.

you clearly see directfreak say the 4 pistons are too big, even with a bigger master cylinder. also, think about what else he said, with the T2 brakes youll be able to keep the e brake.

plus you can do the T2 swap very easily, www.re-speed.com

 

According to info I found,the 929 master will only bolt to the S5 TII vacuum booster.It wont fit the S4 or earlier units.
The 929 unit also requires converting a banjo fitting to flare,which seems like a hassel when there are probably lots of other 15/16" M/C's out there that would bolt right up. Just need to search the net and scrounge yards for a winner.......

That said,in the same thread,someone claimed to have found a 1.03" master that will fit the S4 style booster,but he wouldnt spill the beans as to the application.

Sorry for the assumption,you didnt give any info, other than a 1st gen GSL-SE........