Which cylinders to join in 4-2-1 header systems?
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Joined: Aug 2000
Posts: 229
From: Glen Burnie, Md
Which cylinders to join in 4-2-1 header systems?
On a SBC, or LS1 firing order, which cylinders would you want paired together first, and why?
What would determine where to start the 4-2 merge? How about the 2-1?
What would determine where to start the 4-2 merge? How about the 2-1?
Registered User
Joined: Oct 2002
Posts: 2,931
From: Upstate NY
Another reason to read "Scientific Design of Exhaust and Intake Systems" as was brought up in a recent thread.
The Myth: Resonance Tuning vs. BackPressure
Pair cylinders which fire 180 degrees from each other (on a 4 or 8 cylinder). See another recent thread for firing orders.
Lunati "4/7" cams
As to lengths, there is lots involved. Study the book for some insight.
The Myth: Resonance Tuning vs. BackPressure
Pair cylinders which fire 180 degrees from each other (on a 4 or 8 cylinder). See another recent thread for firing orders.
Lunati "4/7" cams
As to lengths, there is lots involved. Study the book for some insight.
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