Whats better? Tuned or Untuned headers
Thread Starter
TECH Addict
iTrader: (8)
Joined: Feb 2007
Posts: 2,138
Likes: 0
From: Houston/Florida.Currently FL
Whats better? Tuned or Untuned headers hey i was wondering whats better for when i get my headers because i know tuned is more expensive but what is the real difference between tuned and untuned??
Originally Posted by 1meantransam
hey i was wondering whats better for when i get my headers because i know tuned is more expensive but what is the real difference between tuned and untuned??
about 25rwhp and proper a/f ratio.
Trending Topics
Buy based on material/fitment/cost, not tuned or untuned. Nearly all 1-3/4" headers make the same power, "tuned" or "not tuned". The "tuned" portion deals with the way the exhaust pulses hit the collector and promote correct scavenging. If you're in a limited motor racing class, have tons of room under the hood, and are looking for that extra hint of possible HP, tuned headers might be the right choice. Not the case for F-bodies.
Re-read post dude! 
Originally Posted by FU_I_AM_UltraZ
about 25rwhp and proper a/f ratio.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Five Reasons the Camaro Was the Most Pivotal Player in the Pony Car Wars 2.0
Brett Foote
10 Reasons the LS7 Is GM's Most Extreme Naturally Aspirated V8 Engine Ever
Verdad Gallardo
TECH Addict
iTrader: (3)
Joined: Feb 2006
Posts: 2,498
Likes: 3
From: The dirty taint of the country. ...Los Angeles
Originally Posted by bww3588
as far as i know, SLP is the only LT's for the LS1 f-body that are tuned length. and the fitment/clearence sucks.
TECH Regular
Joined: Feb 2004
Posts: 450
Likes: 0
From: Over Here and Over There
A true tuned header would be a header that has a certain primary length,diameter that matches a certain combo. Once you change that combo it isnt tuned to the car anymore. And im not refering to PCM tuning.
Originally Posted by Sudz
i dont understand the whole tuned length theory, The cylinders dont fire at the same time so whats a tuned length going to do anyways ya know?
It uses the venturi principle. Fluid flowing through an area causes a low pressure outside the stream, sort of like a carb. Air flowing past the jet causes fuel to be sucked up through the jet and mixed with the stream. This means the opening of the jet is at a lower pressure than the fuel in the bowl. This difference in pressure is the motive force for the fluid movement.
Ever stood in the shower under the water, then stepped outside of the water? As the water around you stops flowing down your body and hauls *** straight to the floor, the shower curtain sucks in toward you. Step back into the stream and it subsides. Try it in the morning.
In headers case, the exhaust coming out of one primary into the collector is supossed to create a lower pressure in the other primaries. If you make them the right length, you'll have pulses hitting the collector at equally spaced times.
Originally Posted by FU_I_AM_UltraZ
about 25rwhp and proper a/f ratio.
TECH Senior Member
iTrader: (1)
Joined: Apr 2005
Posts: 8,807
Likes: 0
From: Vancouver,[KITSILANO].B.C. Canada *WestCoast*
Originally Posted by bww3588
as far as i know, SLP is the only LT's for the LS1 f-body that are tuned length. and the fitment/clearence sucks.
Last edited by NHRAMAN; Apr 1, 2007 at 05:24 PM.
Thread Starter
TECH Addict
iTrader: (8)
Joined: Feb 2007
Posts: 2,138
Likes: 0
From: Houston/Florida.Currently FL
Originally Posted by bww3588
as far as i know, SLP is the only LT's for the LS1 f-body that are tuned length. and the fitment/clearence sucks.
Originally Posted by 8a8mfh
Half this thread is talking about tuning the VCM and half is refering to equal length headers 
Originally Posted by NHRAMAN
EDELBROCKS are tuned...Equal Length.