Wilwood 4 Disc Conversion

[303 Mopar]

Adding more HP and TQ meant that I needed to upgrade my braking system.  My '70 Cuda had stock front discs and 10" rear drums.  After looking at several options I went with a Wilwood 4 disc system.  I have 18x8 and 18x9.5 wheels so I wanted bigger rotors, and it turns out I had plenty of clearance. 

The parts list includes:

- 12.88" rotors 6 piston up front http://www.wilwood.com/BrakeKits/BrakeKitsProdFront.aspx?itemno=140-12282-DR
- 12.19" 4 piston rears http://www.wilwood.com/BrakeKits/BrakeKitsProdRear.aspx?itemno=140-7144-DR
- 1" bore Master Cylinder http://www.wilwood.com/MasterCylinders/MasterCylinderProd.aspx?itemno=260-8555-BK
- Parking brake cable http://www.wilwood.com/Hardware/HardwareProd.aspx?itemno=330-9371
- Master cylinder adapter and 4 wheel disc brake lines from Magnum Force http://www.magnumforce.com/products.htm
- 610-287 wheel studs (10 1/2-20 thread for the rear)
- Green bearings
- Front Drum Brake Spindles (due the size of rotors)

The front brakes were pretty straight forward.  Remove rotors, calipers, spindles all as one unit.  Install the drum brake spindles, new rotors and calipers, braided brake line to the caliper and you can re-use the old studs. 

[Cuda Cody]

That should be a big help!

[303 Mopar]

The rear brakes were more complicated.  You have to remove the drums and axles to install the green bearings.  I also took this opportunity to install new seals.  Next is the Wilwood brace bracket, then the rotors, and calipers.  My calipers did not fit, so I had to grind down the tabs and inner beveled part for the bolt.  I also had a hard time finding the right length and knurl stud too.  I had to also enlarge the hole in the rotor for the knurl to fit through.

[303 Mopar]

To install the e-brake, I had to cut off the existing bracket because it was directly in the way of the new set up.  This is how I routed the cables. 

[anlauto]

I have drum brake spindles if anybody is thinking of doing this conversion and currently has factory discs...

[GoodysGotaCuda]

Nice, I have the same brakes on mine, except I went to a 15/16" bore master, per wilwoods recommendation.


Also check the centering of the rear calipers on the rotors, I have two different thickness brackets to get mine centered well.

How did you hook the parking brake cable to the factory pedal assembly?






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[1 Wild R/T]

Waiting to see how both of these cars stop......  Between the two I've worked on & all the threads i've read about marginal brakes I'm not convinced These are any better than stock, or even as good as stock.....

[RUNCHARGER]

I converted Greg's Cuda last year and we were pretty happy with it. Only problem was the E-Brake cables were too long and I had to shorten the 71 U-cable. These shots don't show the brakes very well but I installed an aluminum Dana 60 at the same time as the Wilwoods.

[303 Mopar]

How did you hook the parking brake cable to the factory pedal assembly?

I cut the stock bracket off, tied the existing brake cable to the Wilwood bracket with their cable and mounted it on the frame rail where the stock bracket was.

[Moparman82]

Looking damn good Danny boy!! Side not, thanks again for the car guy hang out day last Saturday, that cars and coffee was insane, and it was awesome cruising around town with you and meeting all ur car buddies, even if some of them drive fords    thanks again buddy

[GoodysGotaCuda]

Waiting to see how both of these cars stop......  Between the two I've worked on & all the threads i've read about marginal brakes I'm not convinced These are any better than stock, or even as good as stock.....

I expect the single cold stop performance to be better, but not earth shattering better. I expect them to improve substantially during repetitive hard braking [autocross], which is what my car build is intended for.


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[JonH]

currently doing the same and wondering why you would have to grind on the caliper? Did you get the correct offset kit?

[Chryco Psycho]

Waiting to see how both of these cars stop......  Between the two I've worked on & all the threads i've read about marginal brakes I'm not convinced These are any better than stock, or even as good as stock.....

This has been my experience also

[soundcontrol]

currently doing the same and wondering why you would have to grind on the caliper? Did you get the correct offset kit?

Nice writeup!  Same question here, I have the same stuff, waiting. I added a Hydra boost system also. 

[GoodysGotaCuda]

currently doing the same and wondering why you would have to grind on the caliper? Did you get the correct offset kit?

Wilwood sells different length caliper shims that mount to the drum assembly. My kit fit on one side and did not fit on the other. From my measurements, I determined that the axle housing itself was at fault. I bought the right size shim from Jegs and did not grind anything to make it fit.