Very interested.

The braking is the only thing I feel could be greatly improved.

Not sure about the rears.

I'm sure they could be fabricated. It's just stamped steel.

Is there still any interest in this. I have an 85 GS that i am rebuilding and I Would prefer to put the $ into disks right away rather than redoing the drums then converting. This would be so much easier than getting a GSL rear axle.

GREAT IDEA! if this happens i am in fo sho

i am totally interested!!!

+1

79-83, drum to disk conversion

But this thread is from 07

Sorry if this is a little off topic. I just found respeeds site and saw the 85 big bearing to FC conversion. Does anyone know where I would find out if these would be track legal? I am interested in tracking this car at autocross, or time attack. I am totally new to the race scene and just trying to make sure what I build can be raced. If anyone knows where I can get class Regs that would be great.

Pretty much anything would be legal. But then you are talking about bumping up to a different class.

Also, BUMP! I am interested in the S1-2 Disc rears.

I'm interested in the 84-85 Drum to Big Brake conversion!

any update on this billy?

+1; Drums are gonna start being hard to get at some point! And I am almighty tired of having to adjust them.

My 84 gs would absolutely love a disc conversion, and I'd love to not have to find a raped lsd unit to swap to!

Not to far off. Could use some big bearing drum rear end dimensions if someone has one and a machinist caliper handy.

-billy

Any chance you could make a kit for the 1980 drum rear end I have all the measureing tools needed.

Billy, when you get this ready to go for the SA drums will you address these issues:

- E brake cabling conversion

- Hardline/softline routing and conversion

- Proportioning valve

as either part of the kit or directions for what parts can be used for solving these and advice for implementing solutions?

BTW, you do this and I'm in on it for my next upgrade.

What dimensions do you need. I have a big bearing drum rear sitting along the side of my house..

Yes, 1979-1983 rear disk conversion.

Sending PM.



E brake would be handled by using them form the disk brake car along with the calipers. We have little short SS lines from the hard line to the caliper. Many have used our Rx3 and Rx2 kits without issues using the stock mastercylinder and prop valve. 81-83 cars will be easy due to the disk brake master bolting directly on. SA guys would need to convert the hard lines as well.

-billy

this would be badass
make it

So I went to MAZDA yesterday with my usual cache of parts requests, and one of them was rear drums for an 82 RX7.

His response?

NO MORE.

You have to go to NAPA/Autozone/etc to get them!

http://www.autopartswarehouse.com/de...85c7ab9e&gan=1

rock auto might have them at a lower price

hell yes!
 

+1 for rear disks i got an 82 im doing a 302 swap on a lil extra stoping power would be great lol :icon_tup:

Bump!

Billy, I have an ignorant question to ask you:

Thinking about getting the SS brake lines you guys offer. Considering the car right now is rear drum, would the drum to disc conversion require me to get new rear lines or would I be able to keep my old line? I am 95% sure I will need new ones, but it never hurts to ask!

I can probably answer this one for him ... you'll probably need new ones. I would imagine the whole back brake line would need to be changed because of the way they are desined in the drum vs disc brake.

In the drum brake setup, you have a line going to the driver side and then from there that goes to the passenger side and you only have one bleeder on the passenger side. In order to bleed the calipers properly you'll need a bleeder on every caliper and would have to do something like what the cars that came equiped with disc brakes have. What they have is a machined Y block on the axle (I don't think the Drum axles came with this braket for it) but from that Y you have one line that goes to the passenger side, and another to the driver side.

Rear Drum conversion
 

I have a 1980 S. I would definitely be interested.