We showed a 14% gain in HP and almost 9% (8.8%) gain in torque at the factory with a taper bore 40/38mm. The venturi can somewhat be described as a keyhole design, however there is much more at work than just a big hole and little hole, annular disposition, laminar flow, etc. The taper bore is simply a 40mm front body attached to a full 38mm rear body. This again amplifies the signal to the metering rod with a little trade off in mass flow. The 40/38 moved the torque over to the left of the best 36mm Keihin tests, built power sooner and carried it longer past peak than the best 38mm settings. A straight 40mm made more power yet on top, but with a fair trade off on the bottom.
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I have no intention of giving this away for the sake of selling carburetors. Trying to make people aware of what it is we are dealing with here and hopefully wake them up to the value. Thank you for your comments.
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Funny that the Euro dynos still record data in CVs ... Looks like a super product - can't wait to bolt one on. |
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