What are collectors on header?
The collector is where the primary tubes merge together. “4-1” and “Tri-Y” are the 2 main types of collector design. The 4-1 design brings all 4 primary tubes into one collector at the same point. The Tri-Y design (or 4-2-1) merges the 4 primary tubes into 2 secondary tubes.
How long should header collectors be?
Aside from their unique configuration, it’s interesting to note these collectors usually range in length from 23 to 25 inches–which is well beyond the length of most conventional or merge collectors.
How do merge collectors work?
Merge collectors are designed to minimize this change in area at the transition from the primaries to the collector, which allows the gasses to maintain the greatest possible velocity. By improving the scavenging effect of the exhaust, more air/fuel mixture can be pulled into the combustion chambers.
What is the collector on exhaust?
Almost every exhaust system uses some form of a merge collector. The key role for this merge collector and the most obvious one is to combine the exhaust pipes of the different cylinder into one tailpipe, which could flow to the turbo or the tailpipe.
How long are exhaust collectors?
Header collector length should be established so that its volume is at least twice the displacement of one cylinder of the engine in question. This provides an isolation between the header pipes and the atmosphere, ensuring that the collector does not appear as simply more pipe to the exhaust gas slug.
Do merge collectors make more power?
Merge Collectors combine high flow and high velocity to increase and broaden an engine’s torque curve all the way to the horsepower peak and beyond.
How do you measure a header?
It went like this: Measure the span in feet and add 2 to that number. The sum will be the height of your double header in inches. For example, if the span is 4 feet, add 2 to 4 for a sum of 6. Therefore, the header would need to be made from doubled 2x6s.
What are merge collectors?