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Thread: Viper Brake / Big Brake Mediocre Performance

  1. #26
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    Did anyone ever find a definitive solution to the stiff pedal? The 4 piston Viper calipers and braided lines on the front of my 99 made the pedal too stiff and I was going to order the RAYBESTOS MC390508 master cylinder that's advertised as 15/16" bore but It's kind of a crap shoot if it's actually the smaller bore diameter and if it'll give a better pedal feel.

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  2. #27
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    Quote Originally Posted by Nitrohog View Post
    Did anyone ever find a definitive solution to the stiff pedal? The 4 piston Viper calipers and braided lines on the front of my 99 made the pedal too stiff and I was going to order the RAYBESTOS MC390508 master cylinder that's advertised as 15/16" bore but It's kind of a crap shoot if it's actually the smaller bore diameter and if it'll give a better pedal feel.
    smaller bore will give a softer pedal.

  3. #28


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    Quote Originally Posted by Nitrohog View Post
    Did anyone ever find a definitive solution to the stiff pedal? The 4 piston Viper calipers and braided lines on the front of my 99 made the pedal too stiff and I was going to order the RAYBESTOS MC390508 master cylinder that's advertised as 15/16" bore but It's kind of a crap shoot if it's actually the smaller bore diameter and if it'll give a better pedal feel.
    It hasn't been 10 years yet. LOL!!!

    Seriously, upgrading the fronts to a least 2 piston should be better than the stock single. I am running the SSBS read disk kit, and would like to upgrade the fronts, and SSBS doesn't offer any caliper upgrades.
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  4. #29

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    Any new update or feedback here ? Anxious for a brake upgrade solution, may just go with the 03/04 setup ?

  5. #30

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    I haven’t had a customer yet complain about a stiff pedal when stepping to my brakes.

    But my front kits alone run $1750, so...
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  6. #31

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    I know I'm resurrecting a dead thread again, but I was thinking about this recently. Would it be possible to change the booster to the Viper booster? Since the Viper already uses the same master cylinder, it seems to me that using the Viper booster would possibly correct any issues with the braking system not working 'properly'.
    - Justin


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  7. #32

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    I know I'm resurrecting a dead thread again, but I was thinking about this recently. Would it be possible to change the booster to the Viper booster? Since the Viper already uses the same master cylinder, it seems to me that using the Viper booster would possibly correct any issues with the braking system not working 'properly'.
    The 1992-2010 Viper power brake booster has a diaphragm area of 122.97 sq in. The 1999-2004 Dakota has a power brake booster diaphragm area of 149.23 sq in, and is therefor larger than the Viper. That is why I produce a power brake booster adapter for the 1987-1996 and 1997-1998 Dakota. http://stores.hi-potek.com/brakes/

    I have the Viper brakes, and there is more at fault than just the power brake booster. While the larger booster certainly helps, other problems with the Viper brake kit is that the brake pad doesn't have 100% contact with the rotor, and, the combination/proportioning valve needs balancing.
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  8. #33

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    How are the pads not contacting the rotor? I may have a 1/16" pad overhang off the edge of the rotor, unless you're referring to something else. Is that something inherent to Darren's kit, The GiSM kit, or both? The proportioning valve makes sense, I've heard that tossed around in other discussions before.
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