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port timing

Old 08-18-2007, 11:45 AM
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eclozon
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Default port timing

I have been running a mac 21 pipe on my OS 18. I have a machine shop and a software program for designing tuned pipes. I would like build a pipe just for that motor. Does anyone know where I could get the port timing and port area specs.

thanks
Ed
Old 08-18-2007, 02:53 PM
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topfuel4430
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Default RE: port timing

Are you trying to find the port specs for the engine, or are you trying to find specs for the pipe? You can measure the engine specs easy enough...

~James
Old 08-18-2007, 06:36 PM
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eclozon
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Default RE: port timing

I was trying to find the port timing and area to input into the computer program. If some one has proven demensions for a tuned pipe, that would work too.
thanks
Ed
Old 08-18-2007, 10:58 PM
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Ron Olson
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Default RE: port timing

Here's some reading for you to help answer some of your questions and those that you haven't asked yet.
I remeber seeing anothe site a long time ago with the math numbers to figure out the dimensions for a tuned pipe but it needed a lot of numbers input to it.
http://www.bolly.com.au/book/ContentsMenu.htm

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