Re: Minarelli benassar pipe which to get??????????

xamboozi /
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Sure the 90cc pipe will work. It will direct the exhaust gasses away from the engine just like any other exhaust pipe. You might even get a power boost from it at some random rpm range. However its not designed for that specific 50cc engine. While designing the pipe, just about every aspect is determined with an equation. The "Best" pipe(ridiculously broad term) would be one designed for your engine, and what you want your engine to do.

Header - Attaches to the engine and is the straight or slightly divergent (opens up 2-3 degrees) section of the pipe. It helps to suck the exhaust gases out of the engine. The header pipe cross-sectional area should be 10-15% greater than the exhaust port window for when maximum output at maximum RPM's is desired. In some cases the area of the header pipe may have a cross-sectional area 150% of the exhaust port area. The length should be 6-8 of its diameters for maximum horsepower, for a broader power curve 11 times pipe diameter may be used. The part you trim off to tune.

Divergent (Diffuser) Cone - The section of the pipe that attaches to the header and opens up at an angle like a megaphone. It intensifies and lengthens the returning sound waves thus broadening the power curve. The steeper the angle the more intense the negative wave returns, but also the shorter the duration. The lesser the angle, of course, returns a less intense wave, but for a longer period of time (duration). The outlet area should be 6.25 times the inlet area. 7-10 degree taper angle.

Belly - Located between the divergent and convergent cones, it's length determines the relative timing of the negative and positive waves. The shorter the belly the shorter the distance positive waves travel and the narrower the RPM range. This is good for operating at HIGH RPM only. The longer the belly the broader the RPM range. The diameter of the belly has little or no effect.

Convergent (Baffle) Cone - Located after the belly and before the stinger, reflects the positive waves back to the open exhaust port and forces the fresh fuel mixture back into the combustion chamber as the exhaust port closes. The steeper the angle the more intense the positive wave and the gentler the angle the less intense. 14-20 degree taper angle. The taper angle primarily influences the shape of the power curve past the point at which maximum power is obtained.

Stinger - Located at the opposite end of the pipe from the header and after the convergent cone, it is the "pressure relief valve" of the pipe where the exhaust gasses eventually leave the pipe. The back pressure in the pipe is caused by the size (diameter) or length of the stinger. A smaller stinger causes more back pressure and thus a denser medium for the sound waves to travel in. Sound waves love denser mediums and thus travel better. A draw back to a small stinger is heat build up in the pipe and engine. The stinger diameter should be 0.58--0.62 times that of the header pipe and a length equal to 12 of it's own diameters.

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Subject Written By Posted
  Minarelli benassar pipe which to get???????????Topic by: Cc250r Cc250r 01/01/10 09:27PM
  Re: Minarelli benassar pipe which to get??????????Re: Cc250r Cc250r 01/02/10 10:43AM
  Re: Minarelli benassar pipe which to get??????????Re: Bill_o_MAtic Bill_o_MAtic 01/02/10 11:16AM
  Re: Minarelli benassar pipe which to get??????????Re: RingringBANG ! RingringBANG ! 01/02/10 11:52AM
  Re: Minarelli benassar pipe which to get??????????Re: Cc250r Cc250r 01/02/10 01:35PM
  Re: Minarelli benassar pipe which to get??????????Re: Cc250r Cc250r 01/02/10 05:17PM
  Re: Minarelli benassar pipe which to get??????????Re: tomtom tomtom 01/02/10 05:19PM
  Re: Minarelli benassar pipe which to get??????????Re: Cc250r Cc250r 01/02/10 07:04PM
  Re: Minarelli benassar pipe which to get??????????Re: Bobby Dopefiend Bobby Dopefiend 01/02/10 07:54PM
  Re: Minarelli benassar pipe which to get??????????Re: Cc250r Cc250r 01/02/10 08:37PM
  Re: Minarelli benassar pipe which to get??????????Re: Trevor Yee Trevor Yee 01/02/10 08:39PM
  Re: Minarelli benassar pipe which to get??????????Re: Cc250r Cc250r 01/02/10 09:18PM
  Re: Minarelli benassar pipe which to get??????????Re: GARzan Justin GARzan Justin 01/02/10 09:41PM
  Re: Minarelli benassar pipe which to get??????????Re: Cc250r Cc250r 01/02/10 10:09PM
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  Re: Minarelli benassar pipe which to get??????????Re: Cc250r Cc250r 01/02/10 10:45PM
  Re: Minarelli benassar pipe which to get??????????Re: GARzan Justin GARzan Justin 01/02/10 11:09PM
  Re: Minarelli benassar pipe which to get??????????Re: Cc250r Cc250r 01/02/10 11:16PM
  Re: Minarelli benassar pipe which to get??????????Re: GARzan Justin GARzan Justin 01/02/10 11:28PM
  Re: Minarelli benassar pipe which to get??????????Re: Cc250r Cc250r 01/03/10 03:07PM
  Re: Minarelli benassar pipe which to get??????????Re: Cc250r Cc250r 01/03/10 06:28PM
  Re: Minarelli benassar pipe which to get??????????Re: pepi pepi 01/03/10 07:30PM
  Re: Minarelli benassar pipe which to get??????????Re: Cc250r Cc250r 01/03/10 08:32PM
  Re: Minarelli benassar pipe which to get??????????Re: RingringBANG ! RingringBANG ! 01/04/10 01:29AM
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  Re: Minarelli benassar pipe which to get??????????Re: Cc250r Cc250r 01/04/10 01:09PM
  Re: Minarelli benassar pipe which to get??????????Re: Uphill Nate Uphill Nate 01/04/10 04:06AM
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  Re: Minarelli benassar pipe which to get??????????Re: Cc250r Cc250r 01/04/10 08:18PM
  Re: Minarelli benassar pipe which to get??????????Re: GARzan Justin GARzan Justin 01/04/10 10:07PM
  Re: Minarelli benassar pipe which to get??????????Re: Cc250r Cc250r 01/04/10 11:02PM
  Re: Minarelli benassar pipe which to get??????????Re: [[ Linda ]] [[ Linda ]] 01/04/10 11:09PM
  Re: Minarelli benassar pipe which to get??????????Re: Cc250r Cc250r 01/04/10 11:43PM
  Re: Minarelli benassar pipe which to get??????????Re: nick nick 01/05/10 12:10AM
  Re: Minarelli benassar pipe which to get??????????Re: sam sam 01/05/10 03:03AM
  Re: Minarelli benassar pipe which to get??????????Re: Uphill Nate Uphill Nate 01/05/10 04:23AM
  Re: Minarelli benassar pipe which to get??????????Re: Jerrod Jerrod 01/05/10 09:56AM
  Re: Minarelli benassar pipe which to get??????????Re: GARzan Justin GARzan Justin 01/05/10 02:13PM
  Re: Minarelli benassar pipe which to get??????????Re: Cc250r Cc250r 01/05/10 10:29PM
  Re: Minarelli benassar pipe which to get??????????Re: tony tony 01/06/10 12:25AM
  Re: Minarelli benassar pipe which to get??????????Re: Kit Carsick Kit Carsick 01/06/10 12:44AM
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  Re: Minarelli benassar pipe which to get??????????Re: [[ Linda ]] [[ Linda ]] 01/06/10 02:14AM
  Re: Minarelli benassar pipe which to get??????????Re: Rookie Squid Rookie Squid 01/06/10 03:19AM
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  Re: Minarelli benassar pipe which to get??????????Re: xamboozi xamboozi 01/06/10 05:56PM
  Re: Minarelli benassar pipe which to get??????????Re: xamboozi xamboozi 01/06/10 05:58PM
  Re: Minarelli benassar pipe which to get??????????Re: Patrick Moped Patrick Moped 01/07/10 01:19AM
  Re: Minarelli benassar pipe which to get??????????Re: campeona del mundo campeona del mundo 01/07/10 01:47AM
  Re: Minarelli benassar pipe which to get??????????Re: mattology - mattology - 01/08/10 05:33AM
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  Re: Minarelli benassar pipe which to get??????????Re: Ϫ‡☄ಬ∞ ƀƖḬƝƊ ƤǂƿƎ ∞ಬ☄‡Ϫ Ϫ‡☄ಬ∞ ƀƖḬƝƊ ƤǂƿƎ ∞ಬ☄‡Ϫ 01/08/10 01:12PM
  Re: Minarelli benassar pipe which to get??????????Re: Organ Robbin' Organ Robbin' 01/08/10 02:28PM
  Re: Minarelli benassar pipe which to get??????????Re: adam12 adam12 01/08/10 11:12PM
  Re: Minarelli benassar pipe which to get??????????Re: adam12 adam12 01/09/10 03:03PM
  Re: Minarelli benassar pipe which to get??????????Re: GARzan Justin GARzan Justin 01/09/10 02:17AM
  Re: Minarelli benassar pipe which to get??????????Re: GARzan Justin GARzan Justin 01/09/10 04:35PM
  Re: Minarelli benassar pipe which to get??????????Re: cc250r cc250r 02/01/10 01:50PM
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  Re: Minarelli benassar pipe which to get??????????Re: CtpEDsHED . CtpEDsHED . 02/03/10 11:40AM
  Re: Minarelli benassar pipe which to get??????????Re: david david 02/08/10 02:03AM
  Re: Minarelli benassar pipe which to get??????????Re: xamboozi xamboozi 02/09/10 07:54PM
  Re: Minarelli benassar pipe which to get??????????Re: Justice . Justice . 02/10/10 01:08PM
  Re: Minarelli benassar pipe which to get??????????Re: OBD OBD 02/10/10 01:48PM

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