Cobra brakes and stock master cylinder? December 23, 2008, 09:34:11 AM Okay guys here is the deal I've got a turbo rear with mark 7 calipers up front the car stops fine I've not changed anything except addind 4 wheel disc brakes is the master cylinder up to the task of the cobra brakesThanksRobert Quote Selected
Cobra brakes and stock master cylinder? Reply #1 – December 23, 2008, 10:38:04 AM It might be helpful to tell folks what car you have...You "may" need to step up to a slightly larger MC. What is the pedal travel like with the 73mm calipers up front with the TC disks in the rear.I have a 1" bore MC on the '83 that has Cobras up front and currently TC in the rear and pedal feel and travel is fine.The piston area on those 73mm calipers is huge though...quite a bit more than the Cobra calipers. I'm surprised you're not having issues as it is if you're using a stock MC. Quote Selected
Cobra brakes and stock master cylinder? Reply #2 – December 23, 2008, 11:28:52 AM It's and 86 tbird 5.0 car the travel seems fine car stops good. I tried a master cylinder before and I lost power brakes if u know of a master cylinder that's usable and my power brakes will still work I'll try ThanksRobert Quote Selected
Cobra brakes and stock master cylinder? Reply #3 – December 23, 2008, 12:53:04 PM Not sure what you mean by "lost power brakes". The 1" bore MC is from an '80 Mk 6Mine works fine the way I descirbed. Quote Selected
Cobra brakes and stock master cylinder? Reply #4 – December 23, 2008, 05:47:39 PM I have TC rear disks and Mustang 11" fronts with the stock T-bird MC and the pedal travels too far. The car stops O.K. but does need a better MC...hope this helps. Quote Selected
Cobra brakes and stock master cylinder? Reply #5 – December 23, 2008, 09:06:44 PM okay well if i get a master cylinder from a 94 95 mustang v6 non abs it looks like ill need adapters so the lines will hook up any input on the sizes i know the bird master cylinder has big fittings and the other master cylinder has small linesthanksRobert Quote Selected
Cobra brakes and stock master cylinder? Reply #6 – December 23, 2008, 09:26:52 PM You do not need to switch to the aluminum 3-port master cylinder. You need to find a cast iron (2-port) m/c with larger reservoirs but a marginally larger bore. The m/c that ChuckW suggested will work fine. I've got that same basic one (1984 Crown Vic police) in my '86 with the stock booster and Cobra brakes...pedal is rock solid, no issues whatsoever. It didn't feel all that great with the 11" brake upgrade (pedal feel never inspired confidence) but the 13" Cobra brakes really made the pedal about perfect. Quote Selected
Cobra brakes and stock master cylinder? Reply #7 – December 23, 2008, 09:35:59 PM okay what do you do about the different fittings? the 86 are big the 80 mc are small fittingsRobert Quote Selected
Cobra brakes and stock master cylinder? Reply #8 – December 23, 2008, 10:12:37 PM Adapters work fine...available at NAPA stores or other decent parts stores. Would recommend steel instead of brass; they're less likely to leak.I don't recall there being a "perfect fit" m/c for your existing lines. One way or another, something has to be done.Are you running an adjustable proportioning valve? If so, you could also bend up lines with the fittings you need. Quote Selected
Cobra brakes and stock master cylinder? Reply #9 – December 23, 2008, 10:43:55 PM nope its all stockexcept the brakesRobert Quote Selected
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