Please Help !! Brake System Probs - Lateral-g Forums

Novette_71 · #1 08-26-2011, 05:44 PM

basically your technique is the same except you "preload" the system .... we had really good flow from the caliper screw and this method works fine esp since i have one way flow valves instead of a simple screw.

the MC is brandnew but i really think about replacing it .... which hurts (240 bucks) .... bought it long ago and left it boxed in the shelf so there is no way to send it back as defective.

i will have a test drive tom and see how it works. i just won an auction on bremo calipers for the rear ..... i think i just re-do half of my brake system to have it right.

JKnight · #2 08-26-2011, 05:50 PM

Ok, just wanted to make sure the basics are covered.

My dad had a defective wilwood master straight out of the box. That was about three years ago. Luckily he didn't have it long before installing and finding that it was dead on arrival. Frank at Prodigy replaced it for him and didn't seem too shocked that it was defective.

**Hydratech®** · #3 08-26-2011, 05:51 PM

This might help you nail down where the problem exists:

http://hydratechbraking.com/braketech1.html

Vince@Meanstreets · #4 08-29-2011, 11:53 PM

sounds like a master issue if you keep getting air from the master port...we get this alot if you depress the brake pedal all the way down on a dry or on an old master while bleeding. once you mess up the inner seal its trashed.

Apogee · #5 09-12-2011, 09:50 AM

Sounds like air...probably not what you want to hear. What did you do to bench bleed your master cylinder and how did you confirm that it was fully bleed? I normally plug both outlet ports and then stroke the piston...if it moves further than 1/8 to 3/16 inch before hydraulically locking and feels spongy, then you still have air in your MC. If you can get a firm pedal and it doesn't sink under steady pressure, then the MC is okay 99% of the time.

You didn't specify bore size, but that shouldn't keep you from being able to bleed the system. The rear C4 calipers have 45mm pistons, same as a C5/C6 setup, so while the caliper bodies may be small, they actually should work quite well assuming a Brembo 4-piston caliper with a piston area somewhere around 4 square inches.

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