So exactly how much speed should I expect from my 14' SIB with an older 20hp johnson? The best I can do is 19 mph(via gps) by myself.
The motor is old but runs great, it will start cold on the first pull. After that it will start on a half pull all day long. I put a Davis Doel-fin on it and it comes on plane quick as poop, before the foil the bow would point to the sky before coming down, and it would porpoise pretty bad. I also had cavitation/ventilation issues, and the foil has fixed all that.. My 9X9 prop gives it great hole shots, you better hold on tight! I have a 9X10.5 that I tried, and I went down to 17 mph with noticeable lower engine rpms, I don't have a tiny tach. I haven't measured the distance between my transom bottom to cavitation plate with a tape measure, but it's a "fist" in distance, and I have big hands. I'm getting a lot of splashing on the transom after the foil install, enough to occasionally get wet. I did notice some pressure loss in the tubes that I topped off after in the water. My keel on the other hand seems to not stay at 5 psi, it goes down to 2-3 psi. I topped it off before my speed runs.
My SIB is a real cheap chineese 14' 1.2mm PVC boat with aluminum floors. It's the same as the "stryker" boats from Canada. My boat actually came with a Stryker manual in the box, so it's from the same manufacture as my Aleko.
Any ideas? I was expecting at least 25 mph lightly loaded with a 2 cycle 20 hp tiller outboard. I'm on the lowest trim peg and the motor looks like it's at a 90 degree angle to the tubes.
The motor is old but runs great, it will start cold on the first pull. After that it will start on a half pull all day long. I put a Davis Doel-fin on it and it comes on plane quick as poop, before the foil the bow would point to the sky before coming down, and it would porpoise pretty bad. I also had cavitation/ventilation issues, and the foil has fixed all that.. My 9X9 prop gives it great hole shots, you better hold on tight! I have a 9X10.5 that I tried, and I went down to 17 mph with noticeable lower engine rpms, I don't have a tiny tach. I haven't measured the distance between my transom bottom to cavitation plate with a tape measure, but it's a "fist" in distance, and I have big hands. I'm getting a lot of splashing on the transom after the foil install, enough to occasionally get wet. I did notice some pressure loss in the tubes that I topped off after in the water. My keel on the other hand seems to not stay at 5 psi, it goes down to 2-3 psi. I topped it off before my speed runs.
My SIB is a real cheap chineese 14' 1.2mm PVC boat with aluminum floors. It's the same as the "stryker" boats from Canada. My boat actually came with a Stryker manual in the box, so it's from the same manufacture as my Aleko.
Any ideas? I was expecting at least 25 mph lightly loaded with a 2 cycle 20 hp tiller outboard. I'm on the lowest trim peg and the motor looks like it's at a 90 degree angle to the tubes.
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