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soft brake pedal

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Old Mar 8, 2011 | 06:07 PM
  #1  
Russell Baird's Avatar
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Joined: Mar 2011
Posts: 13
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From: Uniontown, PA
Car: '86 Trans Am (White)
Engine: Its a tree fiddy
Transmission: 1/2 of a 700r-4
Axle/Gears: 3.23
soft brake pedal

On my Trans Am last summer I performed a cam swap and installed headers. I think my fluids boiling because since then I have had a soft pedal. I don't think its a bleeding problem because they were fine before,and the one line is really close to the headers (hedman shorties). I just redid the front end rotors and pads so they are good. Do you guys think the problem is the headers? It does it pretty much from start up but I know headers get hot fast. The help is greatly appreciated.
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Old Mar 8, 2011 | 06:37 PM
  #2  
camaronewbie's Avatar
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Joined: Sep 2002
Posts: 9,192
Likes: 19
From: Cary, North Carolina
Car: 1992 RS
Engine: Carbed 350
Transmission: 700R4
Axle/Gears: 3.42 posi
Re: soft brake pedal

Never seen that, but not trying to say it's not possible. You can bend those lines some to get a tad more headerr clearance - but if the brake line is not touching the header I'd look elsewhere for a problem. I have one curl of a brake line that's within 1/2inch of a header, and never had any issues.

How long has it been since the rubber brake hoses were replaced?
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Old Mar 8, 2011 | 07:46 PM
  #3  
Russell Baird's Avatar
Thread Starter
Junior Member
 
Joined: Mar 2011
Posts: 13
Likes: 0
From: Uniontown, PA
Car: '86 Trans Am (White)
Engine: Its a tree fiddy
Transmission: 1/2 of a 700r-4
Axle/Gears: 3.23
Re: soft brake pedal

We were told by the previous owner that after an engine fire all rubber in the front end was replaced, but I don't know if they were replaced or not. I bent the brake lines over so maybe that isn't the problem. Tomorrow I guess I could get the cousin to watch the lines while I press the brake.
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Old Mar 8, 2011 | 08:17 PM
  #4  
t-top havoc's Avatar
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Joined: Jun 2009
Posts: 2,350
Likes: 3
From: Mid West
Car: '87 Camaro
Engine: '92 Carb'd 350
Transmission: 700r4
Axle/Gears: factory stock
Re: soft brake pedal

What cam did you put in??

Possibly not building enough vacuum for the booster.
If that's the issue, you need some type of vacuum reservour can.

Electric pump avialable too, around $300.
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Old Mar 8, 2011 | 08:52 PM
  #5  
Russell Baird's Avatar
Thread Starter
Junior Member
 
Joined: Mar 2011
Posts: 13
Likes: 0
From: Uniontown, PA
Car: '86 Trans Am (White)
Engine: Its a tree fiddy
Transmission: 1/2 of a 700r-4
Axle/Gears: 3.23
Re: soft brake pedal

The cam I installed was the 280h comp (no exact specs but its on their web site) and its kinda gnarly... I don't really understand the vacuum booster and had figured that it would just go really stiff if that was a problem.
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Old Mar 9, 2011 | 11:35 AM
  #6  
camaronewbie's Avatar
Supreme Member
 
Joined: Sep 2002
Posts: 9,192
Likes: 19
From: Cary, North Carolina
Car: 1992 RS
Engine: Carbed 350
Transmission: 700R4
Axle/Gears: 3.42 posi
Re: soft brake pedal

For me anyway, I had a slight vacuum issue with mine, and I found out that, for whatever reason, if I bumped my timing up a bit and lowered my carb idle back down, I got a bit more vacuum. May help some, I don't know - just throwing it out there.
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