Model Boat Mayhem

The Shipyard ( Dry Dock ): Builds & Questions => Pleasure boats, Sports, Race, Power and Leisure Boats: => Topic started by: F1 madness on February 04, 2013, 01:27:01 pm

Title: Exhaust help
Post by: F1 madness on February 04, 2013, 01:27:01 pm

Would this pipe work on .46 ASP
It states its for a 7.5cc /.46 but want to run it in a boat
(http://i577.photobucket.com/albums/ss219/retic79/KGrHqZHJDFCblhlIRBQo7fCf3k60_12_zps2d483589.jpg)
what you think ???

Title: Re: Exhaust help
Post by: tmbc on February 04, 2013, 09:33:17 pm

yep should be fine m8

Title: Re: Exhaust help
Post by: Danny on February 04, 2013, 10:42:37 pm

A car exhaust will work in a boat but will be more critical in set-up.  The problem is that cars have to be designed for widely variable throttle openings, whereas boats often operate at full throttle, so the optimum tuning length is harder to find.
Another thing you may find is that it will be "peaky", needing even more critical setting as that pipe appears to use flat plate technology instead of the more usual divergant/convergant cones.
For some theory look to the 'master' -
http://www.prestwich.ndirect.co.uk/tunedpipetheory.htm

cheers
Danny

Title: Re: Exhaust help
Post by: F1 madness on February 06, 2013, 07:06:22 pm

Cheers guys
Iv ordered it so will give ago and see what happens  :-))

Title: Re: Exhaust help
Post by: F1 madness on February 10, 2013, 11:58:36 am

Where would be a good starting point on the pipe length
Started putting the boat together now but lining the pipe for exit  :-))

Title: Re: Exhaust help
Post by: bj on February 10, 2013, 06:04:58 pm

Quote from: F1 madness on February 10, 2013, 11:58:36 am

Where would be a good starting point on the pipe length

Try the attached chart for lengths...........