ChevelleForum.net

Go Back   Chevrolet Chevelle Forums > Chevrolet Chevelle Performance > Chevelle Pro-Touring

Reply
 
Thread Tools Display Modes
  #11  
Old 06-01-2016, 11:28 PM
Ken Hayes's Avatar
Ken Hayes Ken Hayes is offline
Senior Member
 
Join Date: Nov 2013
Location: Dearborn Heights. MI
Posts: 918
Default

Hey Hank, your a Moderator here.........block that rude ass douchbag.
__________________
Today, is the tomorrow you worried about yesterday..enjoy it !!!

www.chevelleclubofmichigan.com
Reply With Quote
  #12  
Old 06-02-2016, 10:14 AM
flash flash is offline
Senior Member
 
Join Date: Dec 2009
Location: Canton Georgia
Posts: 8,266
Default

Maybe my problem with headers was that whoever owned the cars and trucks before me put cheap ones on ,they all leaked no matter what I tried .My truck that used to be Chuck Hansons has good headers on it as it does not leak and it runs like a champ .It would be real easy to get in trouble with that bad boy.
__________________

John
Reply With Quote
  #13  
Old 06-02-2016, 06:10 PM
Hank70SS's Avatar
Hank70SS Hank70SS is offline
Moderator
 
Join Date: Dec 2009
Location: Brighton, MI
Posts: 4,432
Default

Ken, I can't block anyone. I can delete posts but only in certain forums. There are different moderators for different forums. Mr and Mrs Grumpy and the admin can block people, ban, or moderate any forum.
__________________
Hank

70 Chevelle SS396(454), M20, 3.73
My Chevelle
Reply With Quote
  #14  
Old 06-02-2016, 06:17 PM
Hank70SS's Avatar
Hank70SS Hank70SS is offline
Moderator
 
Join Date: Dec 2009
Location: Brighton, MI
Posts: 4,432
Default

I'm sure the quality of the headers has a lot to do with it. Current set on the Chevelle were installed on a 396 and now on a 454. No leaks on either and I didn't have to ding them to get them in. On the motor home I installed Doug Thorley's. Very good quality headers, better than the ones I put on the Chevelle. Now I need to order a set for the new motor home, when I get the money and the time to install them.
__________________
Hank

70 Chevelle SS396(454), M20, 3.73
My Chevelle
Reply With Quote
  #15  
Old 06-02-2016, 06:57 PM
RBeckman's Avatar
RBeckman RBeckman is offline
Senior Member
 
Join Date: Apr 2010
Location: Fenton Mi
Posts: 1,432
Send a message via MSN to RBeckman
Default

You damn Americans and your headers....they do nothing let me repeat they do nothing.

Click image for larger version

Name:	image.jpeg
Views:	49
Size:	55.0 KB
ID:	3901
__________________
Ric Beckman
1969 Chevelle SS396
1972 Camaro SS350
Reply With Quote
  #16  
Old 06-06-2016, 10:47 AM
English Power English Power is offline
Junior Member
 
Join Date: May 2016
Posts: 4
Default

Quote:
Originally Posted by Hank70SS View Post
Headers definitely reduce back pressure on the engine. The headers cool the exhaust gases faster than stock manifolds so they condense quicker and create less back pressure. If you think back pressure is a good thing then stuff some raw potatoes up your tail pipes and go for it.

Please explain to me how headers reduce back pressure when the cause of the back pressure (the restrictive exhaust pipes, mufflers, and tail pipes) is still there? Headers are only effective when they are run open or did you Americans forget that little detail? And then headers are only effective when the engine is being run at full power and high rpm; something street engines rarely (if ever) do.

Steel tubing exhaust manifolds do have their place in off road track racing events where mufflers aren't required but when used on street legal vehicles they offer no benefit at all. Just ornaments with a cool name and hefty price tag.
Reply With Quote
  #17  
Old 06-06-2016, 02:38 PM
chevymaher's Avatar
chevymaher chevymaher is offline
Senior Member
 
Join Date: Mar 2014
Location: Kentucky
Posts: 1,155
Default

Quote:
Originally Posted by English Power View Post
Please explain to me how headers reduce back pressure when the cause of the back pressure (the restrictive exhaust pipes, mufflers, and tail pipes) is still there? Headers are only effective when they are run open or did you Americans forget that little detail? And then headers are only effective when the engine is being run at full power and high rpm; something street engines rarely (if ever) do.

Steel tubing exhaust manifolds do have their place in off road track racing events where mufflers aren't required but when used on street legal vehicles they offer no benefit at all. Just ornaments with a cool name and hefty price tag.
Same car same exhaust just headers added. Looks like across the board power increase to me.


Don't know about where you live but things do get run wide open here alot.
Reply With Quote
  #18  
Old 06-06-2016, 06:13 PM
Hank70SS's Avatar
Hank70SS Hank70SS is offline
Moderator
 
Join Date: Dec 2009
Location: Brighton, MI
Posts: 4,432
Default

Quote:
Originally Posted by English Power View Post
Please explain to me how headers reduce back pressure when the cause of the back pressure (the restrictive exhaust pipes, mufflers, and tail pipes) is still there? Headers are only effective when they are run open or did you Americans forget that little detail? And then headers are only effective when the engine is being run at full power and high rpm; something street engines rarely (if ever) do.

Steel tubing exhaust manifolds do have their place in off road track racing events where mufflers aren't required but when used on street legal vehicles they offer no benefit at all. Just ornaments with a cool name and hefty price tag.
Pretty simple physics. The extremely hot exhaust gases leaving the cylinder create a lot of pressure in the manifolds or headers. As they cool and they cool down much faster in headers than in most stock manifolds, the pressure is reduced. Again, pretty simple, headers have much more exposed surface area to to cool the exhaust gases. Blow up a balloon with very hot air then cool it down to freezing and watch the balloon collapse.

Headers cool the exhaust gases faster, once they're cooled down they require less volume and the rest of the exhaust can handle it. Remember that everything that leaves the exhaust had to come in through the carburetor, which is as at ambient temperature. Know look at the ventures in your carburetor and compare the volume to that of the exhaust system. Simple, the sooner you cool the exhaust gases the easier it is for the rest of the exhaust system to handle it.

If you don't believe, fine. There are plenty of dyno runs available to prove it.
__________________
Hank

70 Chevelle SS396(454), M20, 3.73
My Chevelle
Reply With Quote
  #19  
Old 06-08-2016, 01:30 PM
Ms Grumpy's Avatar
Ms Grumpy Ms Grumpy is offline
Bowtie Member
 
Join Date: Dec 2009
Location: Just outside San Antonio, Texas
Posts: 7,400
Default

The posts of English Power in this thread were brought to my attention as being rude and belittling. It is the policy of grumpy and I to enforce a "suspension" before perminently banning someone.

He has been banned for 30 days and if he starts up again then he is gone.
__________________
Get in, sit down, shut up, hold on...cause Ms Grumpy is driving !

For the audio geek try: www.audiokarma.org

Reply With Quote
  #20  
Old 07-15-2016, 11:57 AM
English Power English Power is offline
Junior Member
 
Join Date: May 2016
Posts: 4
Default Corked Headers Are Worthless On Sreet Engines

Corked headers are about as effective as a plugged air filter. Everyone knows a plugged air filter will kill power so why do they think corked headers don't kill power? It's a no brainier.
Reply With Quote
Reply

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 -5. The time now is 06:03 PM.



Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Audiokarma.org