Adjustable PCV Valve - Page 3

MR DERBY CITY · 02-02-2019, 12:53 PM

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

Quote:

Originally Posted by MR DERBY CITY

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

Quote:

Originally Posted by Billy Nees

^^^^^^^^^^^^^^^^^^^^^^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

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

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

Quote:

Originally Posted by Billy Nees

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

Yup.

02-02-2019, 12:53 PM	#21
MR DERBY CITY VIP Member Join Date: Feb 2014 Location: Derby City, USA Posts: 3,316 Likes: 855 Liked 6,587 Times in 1,281 Posts	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....

02-02-2019, 06:05 PM	#24
Billy Nees VIP Member Join Date: Oct 2002 Location: On a hilltop in Pa. Posts: 4,218 Likes: 3,091 Liked 6,772 Times in 1,519 Posts	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. __________________ Billy Nees 1188 STK, SS Make tech "TECH" again!

02-02-2019, 06:18 PM	#25
Mark Yacavone Veteran Member Join Date: Mar 2002 Location: Miles From Nowhere Posts: 7,414 Likes: 2,579 Liked 4,447 Times in 1,693 Posts	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. __________________ We are lucky we don't get as much Government as we pay for..... Will Rogers

02-02-2019, 07:42 PM	#27
Billy Nees VIP Member Join Date: Oct 2002 Location: On a hilltop in Pa. Posts: 4,218 Likes: 3,091 Liked 6,772 Times in 1,519 Posts	Re: Adjustable PCV Valve Yup. __________________ Billy Nees 1188 STK, SS Make tech "TECH" again!