Inexpensive Power Mod

Discussion in '2-Stroke Engines' started by boneswood, Sep 8, 2015.

  1. boneswood

    boneswood New Member

    11233169_10153581057140883_1048152610270488835_o (1).jpg 2 3/16'' of pipe was added from a shower head plumbing tube. Just sand the threads off of the straight end and it fits in your stock carb. Add to a cheap offset intake and you have 7.5'' from the piston to the carb, which helps these engine run efficiently and negates the need for a bottle booster. 11951510_10153581060800883_1513958954703538761_o.jpg
     
    Timbone likes this.

  2. glad you like it!
    Ive found that the shorter the intake, the better.
     
  3. Especially with a performance exhaust.
     
  4. Interesting chain adjuster! Tell us more!
     
  5. butre

    butre Well-Known Member

    the further out you stick the weight of the carb the more force it puts on the joints. it acts like a lever. it's best to mechanically isolate the carb from the engine using rubber hose
     
  6. butterbean

    butterbean Well-Known Member

    This actually gave me an idea for my carb. I'm working on a predator build with an aftermarket carb, and the angle of my intake manifold makes the carb stick out to where my legs will hit when I pedal. I was going to try cutting the manifold and sticking some pipe over or in it. But I like the hose idea better. Any particular type of hose I should look for (temperature resistant?) The manifold is separated from the engine already by a thermal baffle, if that makes any difference.
     
  7. butre

    butre Well-Known Member

    intakes stay relatively cold, the only requirement is that it has to be fuel resistant.
     
  8. butterbean

    butterbean Well-Known Member

    Cool, thanks.
     
  9. jaguar

    jaguar Well-Known Member

    longer intake tracts benefit low rpm power more. a small engine needs all the help it can get with low rpm power. rubber hose is best. any hose will do. I used hose that wasn't gasoline resistant and it held up just fine.
    also add in 6" of pipe in the header before the muffler. that also helps.
     
  10. butre

    butre Well-Known Member

    I've used rubber hose that wasn't gasoline resistant and ended up with a squishy gross mess
     
  11. boneswood

    boneswood New Member

    The chain adjuster is half a hinge attached to a plate that is welded to the frame. The roller blade wheel runs in line with the chain.

    I own a welder so hose seems like too much work, and it is solid enough. Stay tuned for the next photo...
     
  12. butre

    butre Well-Known Member

    solid enough is the problem. the carb needs to be mechanically isolated
     
  13. jaguar

    jaguar Well-Known Member

    agreed. the engine vibrates way too much to have a solid and long intake tube. as well as adding stress it will slosh the gas in the float bowl too much
     
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