negative Crankcase pressure=performance drop?
08-19-2005, 12:31 PM
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Car: 1987 IROC
Engine: Vortec 350 TPI
Transmission: 7004r
negative Crankcase pressure=performance drop?
For aestetic reasons I decided to change my pcv plumbing to include two pcv valves both going to the front of the carb.
Now however when i'm driving i have a lot of vaccum in my crankcase. if i remove the fill cap while idling A lot of air rushes in, i can feel quite a bit of suction on my hand, it's sucking so hard you can hear a feignt whistle while driving.
Is this a bad thing?
Now however when i'm driving i have a lot of vaccum in my crankcase. if i remove the fill cap while idling A lot of air rushes in, i can feel quite a bit of suction on my hand, it's sucking so hard you can hear a feignt whistle while driving.
Is this a bad thing?
08-19-2005, 12:38 PM
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Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Without a breather to let in fresh air, you're not evacuating the blowby gasses from the crankcase, which is the whole point of the PCV system.
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