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Tuned Lenght Exhaust

 
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Kiwi7



Joined: 27 Dec 2005
Posts: 1

PostPosted: Tue Dec 27, 2005 9:38 pm    Post subject: Tuned Lenght Exhaust Reply with quote

What is the exhaust pulse lenght for a 13b Bridge Port. I am currently rebuilding the exhaust for my race engine and would like to work out what the exact length the extractors/headers should be.
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Blake
Been there, done that


Joined: 12 Jul 2005
Posts: 135
Location: Portland, OR

PostPosted: Tue Dec 27, 2005 11:30 pm    Post subject: Re: Tuned Lenght Exhaust Reply with quote

Kiwi7 wrote:
What is the exhaust pulse lenght for a 13b Bridge Port. I am currently rebuilding the exhaust for my race engine and would like to work out what the exact length the extractors/headers should be.


That's just way too involved to estimate. Port timing, engine speed, primary size, taper, collector design, etc. all factor in. I have no scientific formula, but I usually start with 33" or 66" to place the collector and then play with the length from there. Perhaps there's a shortcut or formula out there, but no one has let me in on the secret.
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