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Go Back   CamaroZ28.Com Message Board > 1967-2002 Powertrain Discussion > LT1 Based Engine Tech
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Old 07-26-2014, 05:39 PM   #1
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PCV Opinion

I've had my LT1 for a few months now and it seems to be running very well, I've just been trying to figure out all the things the previous owner had modded / deleted since the list of changes he gave me appears to be somewhat incomplete.

Anyways, the previous owner removed the PCV line on from the passenger side valve cover, installed a breather and capped the inlet on the throttle body.

I've been reading a bit and the consensus appears that a functioning PCV system is better than the breather.. ?

I've also read that if an air foil is installed in the throttle body it will block the flow for the pcv system. My car DOES have an airfoil..

Driver side pcv system appears to unmodified.. (although I'm not 100% sure of what should be there)

So I'm looking for opinions here, what would you do? Retrofit the PCV system back to stock? Leave it be? Modify the driver side? Let me know what you guys think.

Thanks!!
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Old 07-26-2014, 09:27 PM   #2
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Re: PCV Opinion

As you describe it your PCV system is still functioning but it's allowing unmetered air into the engine through the filter on the valve cover.

The air foil should not block air from the system. It might hinder it a bit but it won't completely stop it.

I'd get rid of the filter on the valve cover and reconnect the supply line from the throttle body.
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Old 07-27-2014, 10:15 AM   #3
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Re: PCV Opinion

Agree - keep the PVC system in the factory configuration - works fine. Some people delete the clean air supply line from the throttle body to the valve cover because they have oil blowing out of the valve cover, into the line, and into the throttle body. That is often the result of a plugged PCV valve, broken vacuum line to the PCV valve, or excessive piston ring blowby.

If you feel the the air foil is blocking the air flow, you have two choices - drill a small hole in the upper part of the air foil to allow increased air flow, or simply delete the air foil. It's not doing much:

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Old 07-27-2014, 10:15 AM
 
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