valve covers - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 12-30-2006, 05:54 PM
Registered User
 
Join Date: Dec 2006
Location: ohio
Posts: 45
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
valve covers

any of you guys ever use the valve covers with the 2 tubes on one side with the clamp on breathers... and bare on the other valve cover??? are they good on a street motor or should you use a pcv style valve covers???
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 12-30-2006, 07:09 PM
curtis73's Avatar
Hates: Liver. Loves: Diesel
 
Last wiki edit: How to find cheap parts
Last journal entry: 1999-2001: Getting it on the road
Last photo:
Join Date: Dec 2005
Location: Pittsburgh, PA
Age: 40
Posts: 5,128
Wiki Edits: 16

Thanks: 0
Thanked 1 Time in 1 Post
They're typically used on circle track cars but I see no reason not to put them on a street engine. The PCV system meters ventilation by the valve, not the breathers, so as long as you have adequate breathing (which you would in this case) you should be fine.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 12-30-2006, 10:25 PM
xntrik's Avatar
Save a horse, Ride a Cowboy.
 
Last photo:
Join Date: Jul 2005
Location: Arkansas
Posts: 5,131
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
Curtis is correct
Circle track cars have the vents on the left side of the car, since centrifugal force makes oil go to the right. Two big vents are a good idea, especially since a pcv doesn't pass much volume and blow by can exceed the pcv capacity.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 12-31-2006, 01:26 AM
aka Duke of URL
 
Last wiki edit: Finding vacuum leaks Last photo:
Join Date: Oct 2001
Location: Rockville, MD
Posts: 4,821
Wiki Edits: 1

Thanks: 0
Thanked 0 Times in 0 Posts
You still need a system to properly ventilate the crankcase, whether PCV or road draft on a street engine.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 12-31-2006, 11:56 AM
Canadian Charlie's Avatar
The Big Money
 

Last journal entry: New Air Line Part 2
Last photo:
Join Date: Jul 2004
Location: Malta Europe
Age: 49
Posts: 366
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
What about valve covers that have no holes for breathers, can they be used on the street? I really like those Dart aluminum ones
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 12-31-2006, 12:13 PM
xntrik's Avatar
Save a horse, Ride a Cowboy.
 
Last photo:
Join Date: Jul 2005
Location: Arkansas
Posts: 5,131
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
Quote:
Originally Posted by Canadian Charlie
What about valve covers that have no holes for breathers, can they be used on the street? I really like those Dart aluminum ones

Sure, but the crankcase must have a filler tube/ vented cap somewhere to let air in when the pcv sucks and blow-by pressure out.

Remember seeing any "old" 50s-60s engines that had a oil filler neck on the intake manifold? They usually had a "road draft tube" and and after '62 a pcv to pull the blow-by out of the crankcase.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 01-01-2007, 02:32 AM
Member
 
Last photo:
Join Date: Aug 2005
Location: Yackandandah.Australia.
Age: 52
Posts: 641
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
If your street car has to turn right as well as left you might consider covers with a transfer tube between them at the front and a pair of breathers in the tube - ala IMSA,SCCA etc. 'Course it all depends on how hard you want to corner. Smog laws can be an issue too.
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 01-02-2007, 11:14 AM
johnsongrass1's Avatar
Race it, Don't rice it!
 
Last photo:
Join Date: Jul 2002
Location: Columbia, Mo
Age: 37
Posts: 4,062
Wiki Edits: 0

Thanks: 0
Thanked 8 Times in 8 Posts
What should he one do if you have to turn right to go left?
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 01-02-2007, 11:43 PM
Member
 
Last photo:
Join Date: Aug 2005
Location: Yackandandah.Australia.
Age: 52
Posts: 641
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Steer with the throttle of course, and keep both breathers in front of and higher than the rocker covers.
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 01-03-2007, 08:27 AM
Member
 
Last photo:
Join Date: Feb 2005
Location: chillicothe oh
Age: 46
Posts: 1,445
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Grin real big. just remember when she hooks its time to book.
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 01-04-2007, 01:47 AM
Member
 
Last photo:
Join Date: Aug 2005
Location: Yackandandah.Australia.
Age: 52
Posts: 641
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
All I see is sky.
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 01-04-2007, 02:03 AM
Brian_B's Avatar
Lost in the 50s!
 

Last journal entry: time to start body work
Last photo:
Join Date: Jan 2006
Location: Mountain Home, AR
Age: 47
Posts: 759
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by xntrik
Remember seeing any "old" 50s-60s engines that had a oil filler neck on the intake manifold? They usually had a "road draft tube" and and after '62 a pcv to pull the blow-by out of the crankcase.

Here is a picture of my '56 272 Y-block with the oil filler neck in the intake pan. It has a road draft tube on the other side.



Here is the bottom of the road draft tube:


Last edited by Brian_B; 01-04-2007 at 02:48 AM.
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 01-04-2007, 10:54 AM
boobert's Avatar
Registered User
 
Last photo:
Join Date: Nov 2006
Location: So Cal.
Age: 52
Posts: 69
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
BBC valve covers

I've got a 396 in my 67 Nova it has 1 breather on each side no pcv my problem is the blow by is causing oil to come out of the breathers on to my covers. My motor has about 800 miles on it roller rockers, roller cam etc. Probably around 550 HP any recommendations on how to eliminate the oil seepage.
Reply With Quote Quick reply to this message
  #14 (permalink)  
Old 01-04-2007, 10:58 AM
killerformula's Avatar
Hotrodders.com Moderator
 
Last wiki edit: Carburetor
Last journal entry: Clean up
Last photo:
Join Date: Oct 2003
Location: Northeast
Age: 33
Posts: 3,485
Wiki Edits: 3

Thanks: 13
Thanked 27 Times in 18 Posts
Quote:
Originally Posted by boobert
I've got a 396 in my 67 Nova it has 1 breather on each side no pcv my problem is the blow by is causing oil to come out of the breathers on to my covers. My motor has about 800 miles on it roller rockers, roller cam etc. Probably around 550 HP any recommendations on how to eliminate the oil seepage.

Breathers dont really accomplish the same task as a PCV. They just filter the incoming air so that the PCV's vacuum doesn't draw a dirty charge in from the outside air, and it keeps oil from getting all over the motor. Install a PVC, you could even use two if you like. Sometimes motors that are pretty aggressive can use more ventilation. And yes, a PCV will help with blow by a bit by sealing the rings from the lower end of your motor. If there is damage to the rings or bores, however, you may not notice a difference-

K
Reply With Quote Quick reply to this message
  #15 (permalink)  
Old 01-04-2007, 11:11 AM
boobert's Avatar
Registered User
 
Last photo:
Join Date: Nov 2006
Location: So Cal.
Age: 52
Posts: 69
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Valve Covers

What about baffled Valve Covers?
Reply With Quote Quick reply to this message

Recent Engine posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may 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
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Valve Lash adjustment hiball Engine 36 05-11-2009 10:12 AM
Roller rockers under stock valve covers curtis73 Engine 4 11-19-2006 06:53 PM
302 valve covers? Super Chevy Engine 2 01-13-2004 05:37 PM
348-409 valve covers Scuzzy Engine 2 08-08-2003 12:45 PM
Cam Help black66 Engine 3 05-12-2003 06:15 PM


All times are GMT -6. The time now is 06:15 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.