1) They have a larger flow area vs factory type manifolds.
2) The exhaust PULSES are like marbles moving down a tube therefore the flow with a turbo thru those runners will just be restricted as soon as it enters the turbine portion of the Turbos anyway.
3) I have done a lot of actual dyno testing over the 40 years in my job and have to say I disagree with you on your post.
Cannot disagree that the flow area might be different vs individual runners but we are talking feeding turbos, not NA header Tech.
Tom V.
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"Engineers do stuff for reasons" Tom Vaught
Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward.
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