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-   -   Adjustable PCV Valve (https://classracer.com/classforum/showthread.php?t=72115)

MR DERBY CITY 02-02-2019 12:53 PM
Re: Adjustable PCV Valve
 
Posting for a friend with a 2 barrel.......
He never tightens his carb bolts, and he has a hellacious throttle return spring, actually two of them....

Mark Yacavone 02-02-2019 03:27 PM
Re: Adjustable PCV Valve
 
1 Attachment(s)
Quote:
Originally Posted by MR DERBY CITY (Post 581507)
Posting for a friend with a 2 barrel.......
He never tightens his carb bolts, and he has a hellacious throttle return spring, actually two of them....
Wasn't illegal until a bit after this picture was taken...

GTOMayhem 02-02-2019 05:13 PM
Re: Adjustable PCV Valve
 
Quote:
Originally Posted by Billy Nees (Post 581408)
^^^^^^^^^^^^^^^^^^^^^^BINGO^^^^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^

Especially in a severely restricted engine.

So on a small cube motor, say a 305, with a Quadrajet; no benefit from anymore air? Also asking for a friend.


Rick Thomason
GTOMayhem

Billy Nees 02-02-2019 06:05 PM
Re: Adjustable PCV Valve
 
On my 301 4V I use a power brake check valve with the crankcase sealed. I like to TRY and keep some vacuum in it. I can't tell if it's worth anything but it doesn't seem to be hurting it.

Mark Yacavone 02-02-2019 06:18 PM
Re: Adjustable PCV Valve
 
I don't think you can pull much vacuum in the crankcase with just a PCV ..Maybe with the check ball completely removed.. Would be hard to tune that set up ;-)
You need the header hoses for high speed suction. Of course, not legal in Stock.

I just use the PCV to help keep more of that thin synthetic oil inside the motor.

GTOMayhem 02-02-2019 06:50 PM
Re: Adjustable PCV Valve
 
Quote:
Originally Posted by Billy Nees (Post 581531)
On my 301 4V I use a power brake check valve with the crankcase sealed. I like to TRY and keep some vacuum in it. I can't tell if it's worth anything but it doesn't seem to be hurting it.

So no breather on the cover? Just the brake check valve on one of the valve covers? Or being a Pontiac, the valley pan?


Rick Thomason
GTOMayhem

Billy Nees 02-02-2019 07:42 PM
Re: Adjustable PCV Valve
 
Yup.


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