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perplexing brake issue

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Old Jul 25, 2009 | 07:56 PM
  #1  
w5ga's Avatar
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perplexing brake issue

My son has a 87 Formula Firebird, front disc/rear drum. Car has a 305 with a mild cam. After doing some brake repairs including replacing the rear wheel cylinders and the master cylinder and new front pads, the car just flat doesn't want to stop. The system has been properly bled out, and has good pedal. Doesn't pull left or right or anything stupid like that. It just feels like it has inadequate brakes...can't even lock a wheel up if I sold tickets.

Anybody have any thoughts?
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Old Jul 26, 2009 | 01:13 PM
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//<86TA>\\'s Avatar
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From: Central NJ
Car: 86 Trans Am
Engine: 408 stroker sbc
Transmission: TKO600
Axle/Gears: Moser full floater m9, 3:70 trutrac
Re: perplexing brake issue

did you bench bleed the new master cylinder? This has to be done before its installed in the car. Air will be stuck in the master and no amount of bleeding will get it out because the master sits tilted up and air will sit at the top of it.
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Old Jul 26, 2009 | 01:42 PM
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From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: perplexing brake issue

Originally Posted by //<86TA>\\
Air will be stuck in the master and no amount of bleeding will get it out because the master sits tilted up and air will sit at the top of it.
Will a pressure bleed do the trick?

JamesC
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Old Jul 26, 2009 | 09:58 PM
  #4  
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Re: perplexing brake issue

Originally Posted by JamesC
Will a pressure bleed do the trick?

JamesC
Due to the plastic reservoir, I don't think you can pressure bleed. None of the pressure bleeders I've seen show 3rd Gens as having an application.

I'll try the bench bleed trick, and see if that does it. Thanks!!!
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Old Jul 27, 2009 | 04:06 PM
  #5  
//<86TA>\\'s Avatar
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From: Central NJ
Car: 86 Trans Am
Engine: 408 stroker sbc
Transmission: TKO600
Axle/Gears: Moser full floater m9, 3:70 trutrac
Re: perplexing brake issue

Originally Posted by JamesC
Will a pressure bleed do the trick?

JamesC
i have heard that it wont, but i have not tried it personally
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