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gafmo
 Post subject: Tuned Length
PostPosted: Sun Jun 03, 2007 6:33 pm 
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Hmmm I have seen this mentioned a few times
Whats the go with Tuned Lengthed Exhaust :idea:

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Hanra
 Post subject:
PostPosted: Sun Jun 03, 2007 6:37 pm 
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Good for scavenging exhaust gas at certain RPM aint it? Due to high and low pressure waves and pulses.

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Hanra
 Post subject:
PostPosted: Sun Jun 03, 2007 9:06 pm 
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Found this: http://www.bigcitythunder.com/pages/und ... xhaust.pdf

Page 3 starts to talk about equal length pipes n wat not.

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Lillee
 Post subject:
PostPosted: Mon Jun 04, 2007 8:57 am 
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Forget it Jimo, It's not like you can do anything about the length anyway. I think Graham was saying either chop it half way up the car (something like 3ft length total no muffler) or run the exhaust at twice the length of the car. Either of which is useless :lol:

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pristic
 Post subject:
PostPosted: Mon Jun 04, 2007 1:08 pm 
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Location: Kellyville, NSW
Lillee wrote:
Forget it Jimo, It's not like you can do anything about the length anyway. I think Graham was saying either chop it half way up the car (something like 3ft length total no muffler) or run the exhaust at twice the length of the car. Either of which is useless :lol:


Hmmm, unless you make a long pipe that curves in an s shape under the car to get the length :D

Good luck over speed humps ay!

hehe

Pete.

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Mike_Byron
 Post subject:
PostPosted: Mon Jun 04, 2007 3:33 pm 
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Nope - S shapes only create swirls and resistance which defeats the purpose of the scavenging effect of the lengths.

A cone shaped bit in the last exhaust section could help though as the gases expanding in the cone creates a vaccuum that is filled with the next pulse of gas.
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9YaTaH
 Post subject: Honda 500
PostPosted: Mon Jun 04, 2007 6:24 pm 
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Yep...Honda did something special like that years a go.....claimed to be the most efficient exhaust system ever.

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Mick
 Post subject:
PostPosted: Mon Jun 04, 2007 6:31 pm 
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Location: Under the bonnet son!
Is that like Vizard's reverse megaphone?

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