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Originally Posted by Big hammer
Thanks for posting! Looking good! I would love to hear the exhaust note!
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Think big single cylinder lawn tractor right now. Probably be different once the blown B gets installed.
Quote:
Originally Posted by deuce5wndw
Outstanding Work!!
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Thanks
Quote:
Originally Posted by neds29
Love the dash! Great work. Creativity is #1 in my book.
Stupid question time: Are the exhaust pipes all the same length? I think that I read somewhere years ago that racers build them that way. Is that true?
Ned
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Yes, the goal is to have the exhaust pulses exit the header primary pipe in equal impulses so I tried to keep the pipes the same length. Having too tight of a curve causes problems with the flow though. If the pulses are out of sync the pipe loses efficiency. Using the firing order 1-2-4-3 I paired 1-4 and 2-3 so the impulses will be evenly spaced out. Then both pairs go through the X crossover to feed both pairs of exhaust pipes. I wanted small pipe diameter so I had plenty of velocity which should help draw out the exhaust from the paired cylinders as the high speed exhaust pulse goes past the inactive pipe. There's a lot of science, some thermodynamics and even some math involved to get close.
