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PCV Mod
Topic Started: Feb 13 2009, 05:19 PM (5,910 Views)
Bad Bent
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Facetious Educated Donkey

Welcome to the forum, hotrodfeguy! :coffee

That's cool that you recognize your mod. ^o)

My question is why leave the PCV connected if you have a catch can connected to the VC and Air Cleaner?
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hotrodfeguy
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I didn't do a catch can I just fixed the baffle under the VC and flipped the rubber tube so the oil wasnt falling right into the middle intake runner. The catcg can looks like the wtg.
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starscream5000
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Got 70 MPG?

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Jan 27 2010, 01:44 AM
My question is why leave the PCV connected if you have a catch can connected to the VC and Air Cleaner?
Because the top vent in the TBI hat only provides a very small amount of vacuum, not enough needed to properly vent the crankcase pressures. It's a vent before the throttle body butterfly.

The port that the PCV is hooked into draws a deep, powerfull vacuum as it is after the throttle body. The jiggle valve inside the PCV valve must also function correctly, thus the reason why I said put a new one on when doing a catch can mod.
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