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Old Jul 31, 2011 | 07:52 AM
  #1  
84transamdude's Avatar
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From: York, PA area
Car: 84 Trans Am
Engine: 383 Stroker
Transmission: Th350
power brakes

as u may know i just got a new motor installed but having problems with power brakes not having enough vacum at idle. my question is if i hook the pcv valve back up will that give me more vacum or do i need to get a vacum canister.
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Old Jul 31, 2011 | 08:01 AM
  #2  
J91's Avatar
J91
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From: Columbus Ohio
Car: 91 Z28,64ImpalaSS4094spd,67 Galaxy
Engine: Dart 415Profiler hd,cmprlrs,Hlly750
Transmission: Built 700R4, 3200 stall
Axle/Gears: 3:89 Moser 9"
Re: power brakes

I had to get a canister, it works well...
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Old Jul 31, 2011 | 08:02 AM
  #3  
HawkZ28's Avatar
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Posts: 557
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From: Lincoln, NE
Car: 86 Z28
Engine: Built 312
Transmission: T5
Axle/Gears: 10 bolt 3.42
Re: power brakes

Is the check valve/filter looking deal bad on your line from the intake to the booster? How many inches are you pulling at idle?
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Old Jul 31, 2011 | 08:22 AM
  #4  
84transamdude's Avatar
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From: York, PA area
Car: 84 Trans Am
Engine: 383 Stroker
Transmission: Th350
Re: power brakes

Originally Posted by HawkZ28
Is the check valve/filter looking deal bad on your line from the intake to the booster? How many inches are you pulling at idle?
valve worked on last motor. and im not sure what the vacum is at idle dont have the tool to check
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Old Jul 31, 2011 | 05:33 PM
  #5  
camaronewbie's Avatar
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Joined: Sep 2002
Posts: 9,192
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From: Cary, North Carolina
Car: 1992 RS
Engine: Carbed 350
Transmission: 700R4
Axle/Gears: 3.42 posi
Re: power brakes

Vac guage avail at any parts store for under $10. Might try increasing timing some, and setting isle adjustment lower to compensate idle - I did this on my car to get more vacuum.
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Old Jul 31, 2011 | 07:35 PM
  #6  
84transamdude's Avatar
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From: York, PA area
Car: 84 Trans Am
Engine: 383 Stroker
Transmission: Th350
Re: power brakes

Originally Posted by camaronewbie
Vac guage avail at any parts store for under $10. Might try increasing timing some, and setting isle adjustment lower to compensate idle - I did this on my car to get more vacuum.
the guy who broke it in st the timing 36 total
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Old Aug 1, 2011 | 08:31 PM
  #7  
84transamdude's Avatar
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Joined: Mar 2007
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From: York, PA area
Car: 84 Trans Am
Engine: 383 Stroker
Transmission: Th350
Re: power brakes

So I ordered a cannister from summit. Instructions say about keeping the vacum brake filter if equiped. Is that the black thing or is that the check valve. If check valve do I need to keep it in the line
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Old Aug 1, 2011 | 08:44 PM
  #8  
J91's Avatar
J91
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Joined: Jan 2009
Posts: 1,126
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From: Columbus Ohio
Car: 91 Z28,64ImpalaSS4094spd,67 Galaxy
Engine: Dart 415Profiler hd,cmprlrs,Hlly750
Transmission: Built 700R4, 3200 stall
Axle/Gears: 3:89 Moser 9"
Re: power brakes

Keep checkvalve/filter inline, clean w/brakecleaner if needed, they do get dirty over time....
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