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jhickingbotham
08-18-2012, 01:18 PM
I have a 1976 Donzi Hornet with a small block chevy and a Volvo outdrive. Currently I run the boat in Tahoe and have a 14 L 17 cupped prop on it (at least that is what is marked on the prop). My top speed is about 38-40 and top RPM is 5200. I want to bring that down a bit and just tried a 14 L 19 prop not cupped, but that dropped the speed and increased the top RPM to 5500. What would you suggest? Maybe a 15 L 19 non cupped?

Thanks,
J.