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Top graph has been blown up to show valve set-down ramps. Notice the TW55 has about 0.004 higher lift on the gentle part of the ramp.. The TW55 will certainly be quieter than the H290. (it is so far).
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Max Headflow May 24, 2017
Top graph has been blown up to show valve set-down ramps. Notice the TW55 has about 0.004 higher lift on the gentle part of the ramp.. The TW55 will certainly be quieter than the H290. (it is so far).

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