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Author Topic: Tuned pipes  (Read 1373 times)

hydrobob

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Tuned pipes
« on: March 14, 2013, 05:19:06 PM »

I know that this question must have been asked a million times before but time's running out before Leicester and I want to try the Sprintcat on Sunday. So.....rough starting length, manifold to back end of expansion bit for a rear exhaust Webra 61 please.

Last minute (again) Bob
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tmbc

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Re: Tuned pipes
« Reply #1 on: March 14, 2013, 07:40:27 PM »

depends on pipe but 30cm from plug to high point on the cone   :-)) :-)) :-))
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Danny

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Re: Tuned pipes
« Reply #2 on: March 14, 2013, 07:49:45 PM »

Hi Bob, Mark is about right.  You have a sport/racing engine with the Webra RE, so it may need to be shorter eventually, but its easier to cut some more off, than weld it back on!

This link might help
http://home.intekom.com/modelboats/boat/tunepipe.html

Just hope there is some better weather coming before Leicester` %)

Cheers
Danny

hydrobob

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Re: Tuned pipes
« Reply #3 on: March 14, 2013, 09:29:28 PM »

Thanks for that. As for the weather it's been snowing off and on most of today and, as I live on a 1in6 hill if there's too much I'm going nowhere. I've alreadt had one toboggan ride in the car this winter and that badly eroded the boat budget!
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tmbc

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Re: Tuned pipes
« Reply #4 on: March 14, 2013, 09:34:30 PM »

Ahh well u will live in these exotic locations  %% :} :
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bj

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Re: Tuned pipes
« Reply #5 on: March 16, 2013, 11:47:06 AM »

I know that this question must have been asked a million times before but
Yup!

(Anyone else getting a lot of connection problems to this site BTW?)
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sparkey

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Re: Tuned pipes
« Reply #6 on: March 16, 2013, 12:02:53 PM »

 %% The longer the pipe the power will come in at lower rpm in the rev range,the shorter the pipe the power will come in higher in the rev range, trial and error I am afraid, start with a long pipe and work back till you get what you want, unless you can find someone with the same
setup then it might not be right for your boat,I hope this of some help,Ray {-) {-) [size=78%]  [/size]
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hydrobob

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Re: Tuned pipes
« Reply #7 on: March 17, 2013, 10:33:03 AM »

Thanks Ray.....spot on. Had hoped to test at least one boat today but circumstances have conspired to keep me at home. Ho hum. Just means a bit more to do next Sunday
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