Pontiac Street Performance
Home | Profile | Register | Active Topics | Members | Search | FAQ
Username:
Password:
Save Password

 All Forums
 Pontiac Performance
 Exhaust Tech
 Tuned and Untuned Headers
 New Topic  Reply to Topic
 Printer Friendly
Author Previous Topic Topic Next Topic  

billwolf620
Buffalo

USA
82 Posts

Posted - 08 May 2012 :  07:49:15 AM  Show Profile  Reply with Quote
Can anyone please tell me the difference between tuned and untuned headers other than price? :)

Thanks,

Bill

Bill Boyle
Horse Feathers (Charter Member)

USA
4797 Posts

Posted - 08 May 2012 :  08:11:24 AM  Show Profile  Visit Bill Boyle's Homepage  Reply with Quote
Theoretically speaking, "tuned" headers are those that provide the same velocity and volume of flow between tubes There's a certain balance to them. Theoretically, companies attempt to do this by making the tubes the same length. However, the reality is we put them in street cars and frames and other components get in the way, so tubes are not the same length.

The better headers compromise through design but there's a limit because the damn things have to fit into our cars.

Equal length tubes work on a dragster of funny car.

"Dedicated to keeping the classic Pontiac engine alive."

----
400 bored +.030, forged TRW pistons, ported 62 heads, Hedman headers, 2.5 SS dual exhaust X Pypes, Comp 276AH10 cam, Scorpion 1.65 RR, 850 Q-jet, stock intake & tuned HEI; original owner.
Go to Top of Page

clintww
Cochise

USA
582 Posts

Posted - 11 May 2012 :  8:42:37 PM  Show Profile  Reply with Quote
I just asked the Hooker tech people this question. The pipes don't need to be the sme length to flow even. Bends in the pipe effect flow also. The shorter pipes have sharper bends. Flow is suppose to be equal between all pipes on tuned headers.

P-Body also told me that Hooker headers will make the most power.
Go to Top of Page

Total Jackass
Tribal Scout

0 Posts

Posted - 14 Jan 2014 :  04:35:09 AM  Show Profile  Reply with Quote
Pretty good post.
http://www.amreplicawatches.com/omega-c-132.html

I'm a first class jerk and don't you forget it!
Go to Top of Page

Phil
The Great White Buffalo

USA
7222 Posts

Posted - 14 Jan 2014 :  6:29:52 PM  Show Profile  Reply with Quote
TTT

Bowties are for Pee-wee Herman. "Chevy": even the name sounds cheap, but not as cheap as your Pontiac will be with an LS transplant.
Go to Top of Page
  Previous Topic Topic Next Topic  
 New Topic  Reply to Topic
 Printer Friendly
Jump To:
Pontiac Street Performance © 2006-2017 Go To Top Of Page
This page was generated in 0.09 seconds. This Site Sponsored By:
Powered By: Snitz Forums 2000 Version 3.4.05