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View Full Version : 2015 Challenger Master Cylinder / Booster question



Fabman%
05-16-2023, 10:15 AM
Ive been a member on this Forum for a few years now.... Ive built one Pro touring car...(I use that phrase loosely...;) . I utilized Wilwood Brakes thru out and was very satisfied. Im building something different now utilizing and complete chassis system from a 2015 Challenger. I am NOT using the front suspensions but I am utilizing everything else from the Challenger and molding it into a 70 Road Runner body. I am using the power brake master cylinder and booster from the Challenger- complete firewall, floorpans and rear suspension- but NOT the antilock brakes. Im using the large 3 piston Wilwood's in the front and Challenger brakes in the rear. My question is....Can I utilize the Challenger Master Cylinder WITHOUT using the antilock brakes unit? Will the Challenger Master Cylinder and Booster work like the standard aftermarket Wilwood Booster and dual master cylinder from Wilwood? Will I need a proportioning valve? The Challenger master cylinder IS NOT a dual chamber cylinder but DOES have two brake lines coming off it that go to the anti lock brake control unit.

79 Camaro
05-16-2023, 01:19 PM
I've never done a Mopar brake system. But I've done a few projects with C5 brakes front and rear.
I used C5 booster/master cylinder combos with a single resiovior with two lines You need to check the fittings on the master to see if its double flare or bubble flare. Neither is a big deal. I use Ni-copp brake line to make new lines.
Yes on the adjustable prop valve for the rear brakes.
In regards to the master and Wilwood brakes it really depends on the master cylinder bore diameter. If it was me I would do two things. Call Wilwood and ask questions. I would also just give it a shot and see how they work together.
Depending on the engine control will it want to see the anti-lock brakes?
Mopar has a big front brakes/calipers on some cars. Is the Mopar master different depending on brake caliper type?
So much fun things look into.
Good luck with your project.

Fabman%
05-16-2023, 03:40 PM
79 --
Thanks for your response.. The master cylinder I am using from the 2015 Challenger was the original setup on the Challenger. This particular model Challenger was the SRT 392 6.4 with the really big brakes front and rear. The back brakes are 12.3 inch and the front Wilwoods I have are the same (or similar) size. YES I will have to reprogram the CPU to omit the anti-lock brakes....and probably a few other things....As far as I can see by all the PARTS house's....there is only 1 master cylinder that fits all Challenger models.