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engine pulsing/reasonance

Discussion in 'Technical Q&A' started by bostonmini, Dec 15, 2005.

  1. bostonmini

    bostonmini Formula 3

    Nov 8, 2003
    1,881
    guys, i looked alloever for this topic, i know it has been posted before, anyone have a link? Im looking for info on how a naturally aspirated engine uses this to gain power....on the exhuast side....
     
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  3. Ken

    Ken F1 World Champ

    Oct 19, 2001
    16,078
    Arlington Heights IL
    Full Name:
    Kenneth
    I'm not sure what you're even asking. Are you talking about tuning the exhaust for optimum breathing? If so, this is a VERY complicated subject! When I replaced my mild steel headers with SS of a larger diameter, it took me a LOT of trial and error with the carbs etc. to optimize the power. In the end, I'm a little richer, advanced a couple extra degrees, have a little more air into the carbs and probably added 5 or so horses.

    The important thing is to not have too little or too much back pressure for your engine. The factory system is not just a random bunch of tubes; if you change it you likely need to change the engine setup too or you may even lose HP.

    Ken
     
  4. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
    Lifetime Rossa

    Jan 11, 2001
    20,281
    Texas
    Full Name:
    Steve Magnusson
    I'd suggest you search on the term "exhaust scavenging" here and on the internet (but I don't have any specific links).
     

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