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Paul i have p port my housings with 44 mm outside diameter stainless pipe.The stainless  is from a stock lycoming exhaust pipe that i got from a local AMO for free. The wall is 1.6 mm. The inside diameter is 42.5 mm.
With a 44 mm slide throttle how much Hp more or less on 7500 rpm ?
Plan to tune the intake runners length,after the psru and prop is on the setup.

Le Roux Breytenbach


My guess is 230 HP

Paul Lamar

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