Anyone know of a compatible booster for the FD. I bought a car without one and I cant seem to find a place that sells them.

 

You'll need to get a used one. I dug around once, the booster is unique to the FD.

They should be fairly common used. They pretty much never go out so they really aren't in demand.

Dale

 

Chase Bays offers a brake booster delete kit, frees up a ton of space

 

It's like 2 bolts and a hole. May need to drill some holes , but there should be something that fits with a little modification. The Mazda 929 master cylinder bolts up to an FD booster. Maybe the booster itself is pretty close and can be modified to bolt to the fire wall.

 

I thought the WRX/STI brake booster bolted on and was used as a upgrade?

 

Could be, I've never heard about it. Just searched around on the forum and didn't find anything to that end.

The LHD and RHD boosters are different, the nipple for the vacuum line is in a different spot.

To OP, deleting the booster is a whole thing, it gets pretty advanced and unless you are VERY comfortable with braking systems I'd stick with a stock setup. This is NOT something you want to mess around with, failed brakes can lead to death of you or others on the road.

Keep it simple, keep it stock. It really shouldn't be hard to find a good used one for a very fair price.

Dale

 

The delete kit from Chase Bays already did the research to allow a similar pedal feel without the booster. It comes with a big Wilwood master cylinder (over an inch for the FD), reservoir, bent steel line, and proportioning valve, with an offered clutch line as well. You just tel em what chassis you're running and they send the MC according to if you have an FC, FD, Supra, Mr2, etc...
Downside is it comes with -3 fittings so you need an adapter to get it to ours. I coupled it with an ABS delete kit from Proline Motorsport, removed all the OEM lines and replaced with braided (with a few colors available) lines. Granted I can't comment on how it all feels yet as it's still not running, but it looks great.

 

the firewall to booster bolt pattern seems to be some kind of standard, every Mazda from 1977+ is the same as well as Subaru and even Ford.

that being said they then vary in diameter, depth, and of course the master to booster pattern is semi random too

Manual brakes scare the crap out of people, its pretty rare to drive a car with them.

 

Using a JDM right hand drive booster is ok other then the nipple being on the right side?

 

Probably very easy to find in the forum classifieds...

 

As far as I can tell, I've never personally tried it. It's going to be some messy looking plumbing to hook up the vacuum line.

I'd just get a US LHD booster. Look in the classifieds on the forum for people parting out cars, also there are a few guys that have tons of parts (Fritz Flynn, TomSN16) - message them and they probably have one on hand.

No sense getting a RHD part and having to cobble up something to make it work.

Dale

 

I got one for LHD

 

Where in Florida? If in the Orlando area there is a pull it place and the guy has 4 FD's in a steel building that look to be in good shape. He knows his stuff thought tried to get a deal on the center HVAC vent but caught me. Just let me know and ill give you more info.

 

I sent my leaking, rusty POS FD booster to Power Brake Exchange in San Jose and they completely rebuilt it and powder coated it for me. They have a terrible website but awesome customer service.
https://pwrbrake.com/

 

I have an extra LHD booster as well.

 

I have the Chase Bays dual cylinder brake kit in my FD. The ABS had already been deleted.

The fully manual setup works pretty well for my autox only FD.

Should any one buy the kit, some recommendations.

Get the extended pushrod, that goes from the pedal to the MC. The one that comes with the kit is just barely long enough.
Request CB-DUALMCU-EXTROD. It does not appear in the website. I think it was $25.

Plan on getting the MC reservoir without the clutch line. It will leak after a while. ChaseBays has a clutch reservoir and mount for about $100. I just used $15 motorcycle reservoir from amazon and made a mount.

The kit comes with a cotter pin to retain the MC rod to the lever. The only way it can be installed is upside down, which I didn't like.
So I used this instead: https://www.mcmaster.com/92391A740/

Also re the extended rod, email to CB:

"5/16 Union
With the extended rod with the hex lands built into it, the union used to lock the rod down is too long.
I just cut one in half, and it was fine."

 

Thanks for that! Added to FAQ.