05-23-2004, 12:11 PM
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#101 |
| Senior Member
Join Date: Sep 2001 Location: Ontario, Canada
Posts: 5,823
Car: 1988 Firebird S/E Engine: 406Ci Vortec SBC Transmission: TH-350/3500stall Axle/Gears: 7.5" Auburn 4.10 Posi-Traction | Quote: Originally posted by OMINOUS_87
You got it, at WOT there should be no vaccum in the intake. | At WOT, intake manifold vacuum is not 0. It is low(er) than at part throttle or idle, but not 0.
(more like .5"H20 to 1" H20.) Crankcase pressure is high(er) so crankcase air still flows into the intake through the PCV while@ WOT.
Air always flows from high pressure to low pressure.
If intake manifold vacuum @ WOT was 0, no air would flow into the engine at all. The only time the intake manifold vacuum is 0 is when the motor is not running. | | | |
 
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