The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > General Truck Forums > Engine & Drivetrain

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 07-02-2021, 06:16 PM   #1
Starwood
Registered User
 
Starwood's Avatar
 
Join Date: Mar 2019
Location: SAN RAMON
Posts: 73
PCV Question: 327

My (new) 1970 has a rebuilt 327. The Rochester was old and tired so I swapped in my new fave: The Street Demon.

The existing PCV setup has this cannister between the Carb and Filter. It doesn’t fit exactly flush with the new carb without a spacer mod or other workarounds.

My question for you Fellas is: Would I be making a mistake by just putting in a standard GM small block PCV and running to a vaccum - or is this Cannister Combo setup mandatory for the 327? Its my first 327 and I wanna make sure I treat her right.
Posted via Mobile Device
Attached Images
 
Starwood is offline   Reply With Quote
Old 07-02-2021, 07:06 PM   #2
kwmech
Senior Member
 
Join Date: Mar 2003
Location: Colfax-California
Posts: 8,356
Re: PCV Question: 327

The part we are looking at there is the fresh air intake for the crankcase. So the PCV valve will be in the other cover. The intake (fresh air) is usually in the back hole of that cover. In a couple of my trucks (big block) I changed the riser to a later model (thinner)and got creative with the tube to the riser from the cover. Either way for the PCV to work correctly it will need filtered air from somewhere.. Where is the PCV valve right now? plus I see no 3/8'' port for it in the base plate of the carb
kwmech is offline   Reply With Quote
Old 07-02-2021, 07:35 PM   #3
Starwood
Registered User
 
Starwood's Avatar
 
Join Date: Mar 2019
Location: SAN RAMON
Posts: 73
Quote:
Originally Posted by kwmech View Post
The part we are looking at there is the fresh air intake for the crankcase. So the PCV valve will be in the other cover. The intake (fresh air) is usually in the back hole of that cover. In a couple of my trucks (big block) I changed the riser to a later model (thinner)and got creative with the tube to the riser from the cover. Either way for the PCV to work correctly it will need filtered air from somewhere.. Where is the PCV valve right now? plus I see no 3/8'' port for it in the base plate of the carb
Posted via Mobile Device
Starwood is offline   Reply With Quote
Old 07-02-2021, 07:45 PM   #4
Starwood
Registered User
 
Starwood's Avatar
 
Join Date: Mar 2019
Location: SAN RAMON
Posts: 73
Re: PCV Question: 327

What you see is the same set up with the Rochester. Only thing missing from pic is air cleaner mounted on top of cannister.
My other 350 just has a PCV going from valve cover to direct vaccum off Demon. I’m just curous if I can do the same here with a 327. I’ll post new pics of the 350 PCV setup and 327 with filter mounted. Thanks
Posted via Mobile Device
Starwood is offline   Reply With Quote
Old 07-02-2021, 07:46 PM   #5
Starwood
Registered User
 
Starwood's Avatar
 
Join Date: Mar 2019
Location: SAN RAMON
Posts: 73
Posted via Mobile Device
Posted via Mobile Device
Attached Images
  
Starwood is offline   Reply With Quote
Old 07-02-2021, 08:36 PM   #6
geezer#99
Registered User
 
geezer#99's Avatar
 
Join Date: Aug 2009
Location: Bowser
Posts: 13,495
Re: PCV Question: 327

Make your hose longer. You can find couplers in the hardware store plumbing section. Add a new length of hose and rotate the riser and hose to where it fits better.



https://www.rona.ca/en/coupling-uppc...E&gclsrc=aw.ds
geezer#99 is offline   Reply With Quote
Old 07-02-2021, 08:57 PM   #7
Starwood
Registered User
 
Starwood's Avatar
 
Join Date: Mar 2019
Location: SAN RAMON
Posts: 73
So…if just getting a new PCV and routing to a vaccum is not an option, I guess I’ll just stick with the canister setup. Tried flipping valve cover and that’d be a layup with an easy fit, but they’re glued down with cork…was wishing they were FEL PRO but that’s my luck lately.

Thx Fellas.
Posted via Mobile Device
Starwood is offline   Reply With Quote
Old 07-02-2021, 09:12 PM   #8
geezer#99
Registered User
 
geezer#99's Avatar
 
Join Date: Aug 2009
Location: Bowser
Posts: 13,495
Re: PCV Question: 327

You only need one pcv valve.
You got one already on drivers side.
Maybe a breather on the other is all you need.
Like this.



https://www.competitionproducts.com/.../#.YN-5IS1fOfA

What year is your 327?
geezer#99 is offline   Reply With Quote
Old 07-02-2021, 09:27 PM   #9
Starwood
Registered User
 
Starwood's Avatar
 
Join Date: Mar 2019
Location: SAN RAMON
Posts: 73
Re: PCV Question: 327

Quote:
Originally Posted by geezer#99 View Post
You only need one pcv valve.
You got one already on drivers side.
Maybe a breather on the other is all you need.
Like this.



https://www.competitionproducts.com/.../#.YN-5IS1fOfA

What year is your 327?
That other pic is the PCV setup on the 64 350 as an example.
All I want to know is if I can mirror this setup with a 327.
Tnanks
__________________
64 C10 Custom
70 C10 Stepside w/67 Front End Clip
1970 Buick Ragtop
2003 Anniversary Road King Classic
Starwood is offline   Reply With Quote
Old 07-02-2021, 09:49 PM   #10
geezer#99
Registered User
 
geezer#99's Avatar
 
Join Date: Aug 2009
Location: Bowser
Posts: 13,495
Re: PCV Question: 327

You can copy the other one.
All you need is a pcv in one cover and an air supply in the other cover.
I asked your 327 year because some 327’s had a road draft tube cap that the pcv hooked up to.
That cap is right beside the distributor.
geezer#99 is offline   Reply With Quote
Old 07-03-2021, 08:28 PM   #11
Starwood
Registered User
 
Starwood's Avatar
 
Join Date: Mar 2019
Location: SAN RAMON
Posts: 73
Quote:
Originally Posted by geezer#99 View Post
You can copy the other one.
All you need is a pcv in one cover and an air supply in the other cover.
I asked your 327 year because some 327’s had a road draft tube cap that the pcv hooked up to.
That cap is right beside the distributor.
Thx Man. Worked out fine even looks so much cleaner. That cannister gig was a buzz kill. Thx again
Posted via Mobile Device
Starwood is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 12:36 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com