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75duster
 Post subject: turbo question
PostPosted: Fri Nov 03, 2006 10:45 pm 
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TBI Slant 6
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Joined: Wed Mar 22, 2006 12:57 pm
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Location: yakima wa
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how do you run power brakes with a turbo? is there enough vacume on the valve side of the throttle plate when running a turbo to use power brakes?

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1975 Plymouth Duster,225/6 2bbl. and duels, 904, 7 1/4
1986 Dodge Charger Shelby, 2.2 Turbo I, A525
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Rust collector
 Post subject:
PostPosted: Fri Nov 03, 2006 11:27 pm 
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Joined: Sat Feb 19, 2005 5:31 am
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Should be if you let off the throttle?
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Joshie225
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PostPosted: Sat Nov 04, 2006 12:02 am 
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Supercharged
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The power brake booster has a check valve to hold vacuum in the booster. If the engine produces decent idle vacuum you'll have no problems. Most turbo engines do have good idle vacuum since they usually have cams with very little overlap.

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75duster
 Post subject:
PostPosted: Sat Nov 04, 2006 7:20 pm 
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how bout supercharged (roots blower)?

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1975 Plymouth Duster,225/6 2bbl. and duels, 904, 7 1/4
1986 Dodge Charger Shelby, 2.2 Turbo I, A525
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Al T
 Post subject: PB and blowers
PostPosted: Sun Nov 05, 2006 9:14 am 
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My PB pull vacuum from behind the throttle body but before the eaton blower. When the boost starts building, the bypass valve closes and vacuum remains. Of course you really don't need brakes and boost at the same time.

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Al T
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