Newbie '29 Speedster project, the good the bad and even the ugly (maybe)

[Big hammer]

Thanks for posting! Looking good! I would love to hear the exhaust note!

[deuce5wndw]

Outstanding Work!!

[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

[Ranchero50]

Originally Posted by Big hammer

Thanks for posting! Looking good! I would love to hear the exhaust note!

Think big single cylinder lawn tractor right now. Probably be different once the blown B gets installed.

Originally Posted by deuce5wndw

Outstanding Work!!

Thanks

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

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.

[Ranchero50]

Somewhat delayed update. Been working on the skins to finish the body. Made a tail cap, the other side panel and have been working on the shoulder skins now. Funny that it's finally getting easier to manipulate the metal. There's also a '23 Model T that showed up waiting for it's chance to become a speedster.