Reason for no headers with STS again??
Aug 11, 2008 | 08:02 PM
#1
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From: Valrico, Florida
Reason for no headers with STS again??
I keep hearing this, but when I did a search I did not find any concrete evidence of the why nots and it appears wrapping the headers would help a lot. Can the guru's give some concrete facts on why the manifolds are better for a towing package hoping to make 550 to 600rwhp on a 6.0L Crew Cab Dually truck?
Aug 11, 2008 | 08:40 PM
#2
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Joined: Jul 2008
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From: Chino Hills, Ca
I am looking in to a STS turbo myself, and the feeling from there website is that you do not need the headers "save money" to make big turbo power.
If you spend 500 on headers your 500 further from there kit.
If you spend 500 on headers your 500 further from there kit.
Aug 11, 2008 | 08:45 PM
#3
Headers and the thin metal cools the exhaust more than stock cast manifolds do, so you lose some of the velocity, which makes everything spool slower. You want to retain as much heat as possible ahead of the turbo.
Aug 11, 2008 | 08:52 PM
#6
Heres the definate answer, from CarCraft, long skinny tubes
seems to be your answer.
Graph A illustrates how merely changing pipe diameter affects an engine's output. Note that the smallest diameter creates good midrange torque yet falls off at the top, while the larger primary header pipes add more high-rpm power at the expense of low-speed torque.
Primary pipe length can also skew an engine's power curve based on length changes. Primary-pipe diameter establishes the peak torque point, so changing the pipe length will rock the output curve by pivoting it around that peak torque point. Graph B shows how longer tubes tend to increase power below peak torque while hurting power above peak torque. Shorter tubes tend to affect the engine in exactly the opposite way, hurting midrange torque in favor of increasing top-end power.
seems to be your answer.
Graph A illustrates how merely changing pipe diameter affects an engine's output. Note that the smallest diameter creates good midrange torque yet falls off at the top, while the larger primary header pipes add more high-rpm power at the expense of low-speed torque.
Primary pipe length can also skew an engine's power curve based on length changes. Primary-pipe diameter establishes the peak torque point, so changing the pipe length will rock the output curve by pivoting it around that peak torque point. Graph B shows how longer tubes tend to increase power below peak torque while hurting power above peak torque. Shorter tubes tend to affect the engine in exactly the opposite way, hurting midrange torque in favor of increasing top-end power.
Aug 11, 2008 | 08:56 PM
#7
Heres the definate answer, from CarCraft, long skinny tubes
seems to be your answer.
Graph A illustrates how merely changing pipe diameter affects an engine's output. Note that the smallest diameter creates good midrange torque yet falls off at the top, while the larger primary header pipes add more high-rpm power at the expense of low-speed torque.
Primary pipe length can also skew an engine's power curve based on length changes. Primary-pipe diameter establishes the peak torque point, so changing the pipe length will rock the output curve by pivoting it around that peak torque point. Graph B shows how longer tubes tend to increase power below peak torque while hurting power above peak torque. Shorter tubes tend to affect the engine in exactly the opposite way, hurting midrange torque in favor of increasing top-end power.
seems to be your answer.
Graph A illustrates how merely changing pipe diameter affects an engine's output. Note that the smallest diameter creates good midrange torque yet falls off at the top, while the larger primary header pipes add more high-rpm power at the expense of low-speed torque.
Primary pipe length can also skew an engine's power curve based on length changes. Primary-pipe diameter establishes the peak torque point, so changing the pipe length will rock the output curve by pivoting it around that peak torque point. Graph B shows how longer tubes tend to increase power below peak torque while hurting power above peak torque. Shorter tubes tend to affect the engine in exactly the opposite way, hurting midrange torque in favor of increasing top-end power.
Rick
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Aug 11, 2008 | 09:06 PM
#9
Aug 11, 2008 | 09:11 PM
#10
I get that, but headers will offer less restriction, and scavenging, both of which make the motor more efficient, not to mention higher velocity in the exhaust, (if you wrap the headers for heat retention) which adds up to more energy at the turbo.