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Question for those with 65 disc brakes

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Old Aug 3, 2009 | 01:10 PM
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Default Question for those with 65 disc brakes

Well after a whopping couple of hundred miles I have noticed that my disc brakes just aren't up to par. They require alot of pedal pressure to stop. I originally had 4 drum brakes which were converted to SSBC fronts and I have wilwood brakes on my 9 Inch rear.
Everything is new with a proportioning valve on rear. I thought that they just needed to be broken in but they just arent that good.
They have been bled( bench and regular) and pedal pressure is fine.

I read something from "Mustang Steve" about a pedal modification and am wondering if this would help. I have power brakes( I think 7 inch boster with 1 inch piston with dual master). Do you guys have good stopping power with a stock pedal. Let me know your thoughts
Old Aug 3, 2009 | 01:22 PM
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What pads are you running? Is your brake bias adjusted?
Old Aug 3, 2009 | 01:40 PM
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I'm curious about the brake bias too. If the rears aren't working properly, you're going to have to apply more pressure to the fronts to get them to stop the car.

Also, how's your engine idle vacuum?
Old Aug 3, 2009 | 01:49 PM
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Pads are new. The bias is adjusted to be in the middle of the adjustment. Counted the turns and then put it in the middle. I called SSBC and they said to check that my cam didnt take away the vacuum( mild edelbrock performer) but I dont think so. The said needs 18 or more inches to work.

The other question is I had 4 wheel drum and used the same distribution valve. Could that make a difference. SSBC said also to check that the fronts went to the large reservoir and the rears to the small reservoir. I will check that tonight.

Well at least I think I have the overheating solved.
Old Aug 3, 2009 | 01:53 PM
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The bias needs to be adjusted by driving. You don't just set it in the middle, it needs to be adjusted so the front locks up a little before the rear.
Old Aug 3, 2009 | 01:53 PM
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Pads are new. The bias is adjusted to be in the middle of the adjustment. Counted the turns and then put it in the middle. I called SSBC and they said to check that my cam didnt take away the vacuum( mild edelbrock performer) but I dont think so. The said needs 18 or more inches to work.

The other question is I had 4 wheel drum and used the same distribution block. Could that make a difference. SSBC said also to check that the fronts went to the large reservoir and the rears to the small reservoir. I will check that tonight.

Well at least I think I have the overheating solved.
Old Aug 4, 2009 | 11:54 AM
  #7  
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I have the stock 65 disk brakes with the stock MC. Not power. I can tell you they stop very well. I was a little concerned with the pedal effort for my wife so we upgraded to EBC GreenStuff pads and the pedal effort is much reduced. The brakes STOP just as well or better than our late model cars/suv
Old Aug 5, 2009 | 09:48 AM
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When I went to Mustang Steves web site he says the power brakes and manual brakes use the same pedal. He sells a kit to add a brace to the firewall and relocate the pedal pivot point further down the pedal. I have power from SSBC with a 7inch booster and am wondering if relocating the pedal hole would help the effort. I am not sure that I could even lock them up at the moment if I had to.
Old Aug 5, 2009 | 10:13 AM
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Everyone is talking pads, etc. Take a look at your vacuum operating the power brake booster. You may not have enough vacuum if you're running a hot cam. If this is the case, consider adding a vacuum reservoir if needed. I'm running SSBC with drums in the rear (porterfield shoes) and I'm amazed at well I stop. . . no power though.
Old Aug 5, 2009 | 10:53 AM
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as others said check on the vacuum
as you said with the front and back reservoir:
the one near firewall (usually larger) is where you attach your front brakes to
the one away from firewall is where you attached the rear brakes to

from the MC (large bowl near firewall) the line goes to the distribution block (you can use the original). From the distribution block you have one line to right front, one line to left front brake. the forth connection on distributor block (which before went to rear brakes on single master sertup) needs to be blocked.

from the MC (small bowl away from firewall) the line goes to proportioning valve and from there to rear brakes. It's a single line that splits over the rear axle to get fluid to left and right rear.

Kalli



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