ChevelleForum.net

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

Reply
 
Thread Tools Display Modes
  #1  
Old 05-31-2016, 04:14 PM
English Power English Power is offline
Junior Member
 
Join Date: May 2016
Posts: 4
Default Headers Are Worthless On Street Engines

We Europeans have always known steel tubing exhaust manifolds (aka "headers") are worthless when used on street engines unless they are run OPEN ("uncorked"). And as you can't run OPEN headers on the street they are nothing but worthless ornaments with a fancy name and an even fancier price.

You gullible Americans have been convinced headers actually "produce" power when in fact they don't produce anything. Power is produced inside the cylinders and once the hot exhaust gasses get blown out of the cylinders the power "event" is over.

When "headers" were first used in the early 1960's their collectors had 4" diameter cover plates attached so they could be opened "uncorked" so the exhaust gasses could be blown to the open air. But sometime after the 1960's ignorant people began attaching their exhaust pipes directly to the ends of the collectors which made the headers worthless other than looking racy.

Headers are intended to be run OPEN to bypass the restrictions of the exhaust pipes, mufflers, and tail pipes. But as street engines require mufflers what good are the headers when they have to be run corked?

So why do you goofy Americans love your headers so much?
Reply With Quote
  #2  
Old 05-31-2016, 05:24 PM
flash flash is offline
Senior Member
 
Join Date: Dec 2009
Location: Canton Georgia
Posts: 8,243
Default

Im sure Im in the minority but I hate headers ,they leak ,make it hard to change plugs ,and you normally have to ding them to fit.I only have one truck that still has headers and it came with them when I bought it .
__________________

John
Reply With Quote
  #3  
Old 05-31-2016, 06:08 PM
chevymaher's Avatar
chevymaher chevymaher is offline
Senior Member
 
Join Date: Mar 2014
Location: Kentucky
Posts: 1,144
Default

Quote:
Originally Posted by English Power View Post

You gullible Americans have been convinced headers actually "produce" power when in fact they don't produce anything. Power is produced inside the cylinders and once the hot exhaust gasses get blown out of the cylinders the power "event" is over.
True but if the gasses can't be scavenged out effectively. The cylinder is not empty. You can't fill it if it isn't empty. So the cylinder can't produce peak power if it isn't a complete fresh charge of gas and air. Burnt gasses do not magically reburn.

May want to check a few dyno test out of stock exhaust and then changed to headers with matched exhaust systems. Before getting rude.

There is another chevelle site Team Azzhole go there and start things. Here we like to get along.
Reply With Quote
  #4  
Old 05-31-2016, 06:28 PM
Hank70SS's Avatar
Hank70SS Hank70SS is offline
Moderator
 
Join Date: Dec 2009
Location: Brighton, MI
Posts: 4,406
Default

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.
__________________
Hank

70 Chevelle SS396(454), M20, 3.73
My Chevelle
Reply With Quote
  #5  
Old 05-31-2016, 06:31 PM
Hank70SS's Avatar
Hank70SS Hank70SS is offline
Moderator
 
Join Date: Dec 2009
Location: Brighton, MI
Posts: 4,406
Default

Quote:
Originally Posted by flash View Post
Im sure Im in the minority but I hate headers ,they leak ,make it hard to change plugs ,and you normally have to ding them to fit.I only have one truck that still has headers and it came with them when I bought it .
Only leaks I've had are from stock manifolds on a 454 in our old motor home. They heated up so much they cracked the manifolds and busted the bolts. After installing a set of headers, no more leaks and a definite increase in power. Just my experience John and I do run headers on the Chevelle.
__________________
Hank

70 Chevelle SS396(454), M20, 3.73
My Chevelle
Reply With Quote
  #6  
Old 05-31-2016, 07:37 PM
carpoor carpoor is offline
Senior Member
 
Join Date: Dec 2011
Location: Floriduh
Posts: 2,131
Default

Great first post.
__________________
1972 SS 454 Chevelle LS5/M21/12 bolt 3.73 posi
1969 Malibu factory L48/M20/12 bolt 3.31 posi
2001 Silverado RCSS LQ4/80E/4.11 posi. Cam'd & bolt ons
Reply With Quote
  #7  
Old 06-01-2016, 09:29 AM
mestorod70 mestorod70 is offline
Senior Member
 
Join Date: Jun 2013
Location: honah lee in a cave by the sea
Posts: 384
Default

Goofy troll
Reply With Quote
  #8  
Old 06-01-2016, 03:46 PM
Hank70SS's Avatar
Hank70SS Hank70SS is offline
Moderator
 
Join Date: Dec 2009
Location: Brighton, MI
Posts: 4,406
Default

I guess headers don't help a lot on the 3 cylinder engines developing 87 HP they drive in Europe.

Think we may know a little more about American Muscle than him.
__________________
Hank

70 Chevelle SS396(454), M20, 3.73
My Chevelle
Reply With Quote
  #9  
Old 06-01-2016, 03:56 PM
RBeckman's Avatar
RBeckman RBeckman is offline
Senior Member
 
Join Date: Apr 2010
Location: Fenton Mi
Posts: 1,426
Send a message via MSN to RBeckman
Default

Typical euro rudeness, trust me I deal with it daily.
__________________
Ric Beckman
1969 Chevelle SS396
1972 Camaro SS350
Reply With Quote
  #10  
Old 06-01-2016, 08:10 PM
mestorod70 mestorod70 is offline
Senior Member
 
Join Date: Jun 2013
Location: honah lee in a cave by the sea
Posts: 384
Default

Perhaps the guy banged his head under the bonnet of his hillman imp estate.
Those pesky big end knocks from the 65Hp monster. maybe adjusting the 1 bbl carb will help.
POME subjects like this fine gent give us true red white and blue brits a bad rep.

Funny thing is....i got a 500 hp chevelle. lol lol.
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 04:41 PM.



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