For me performance is a lot more than top speed.
Going from a carbed 225 looper to an injected 150 ETEC I'm getting 7 mph less top speed with 75 less hp, 2" less prop, about 42 lbs less weight, but 3 times the fuel economy. I never top speed her anyway usually running 4100-4400 rpms pushing low to mid 30's. Bring her up to 5000-5100 going back to the ramp for a short burst.
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1985 Wellcraft V-20, Evinrude ETEC 150: SOLD
1979 Marine Trader 44, twin Ford Lehman 120s
2006 Panga 14, Tohatsu 20
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