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03-28-2020, 07:56 PM | #1 | |
Join Date: Apr 2017
Location: Omaha, NE
Posts: 8,065
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Quote:
If you want the ultra nerdy explanation, you are hearing two things. When the slide first opens you hear the increase in vacuum across the slide and venturi . The secondary part of the intake noise is you experiencing the anode of the intake harmonic wave as it bounces off of the intake valve when it closes (the node) and the shockwave reverts back out the inlet of the carb to open air (anode). You can actually hear the intake resonance wave at its strongest in a specific RPM point in the curve, usually close to torque peak, You can also visibly see the waves with an open carb inlet. This video actually shows it quite well. You should also hear some familiar noises.
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Tags |
125cc, carb issues, carbeurator, vader 125 |
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