anthony_marquart
Well-Known Member
- Joined
- Nov 4, 2003
- Messages
- 3,745
Lets say you're running a boat at a given pipe length and you keep shortening it. Excluding difficult launches, what are the symptoms of getting too short?
Would you actually begin to loose top speed rpm? burn plugs?
I have a sp21 that i know is running a strong engine. IT's a 70mpg motor in the rigger. In my sp21, I have less prop, but I am running the same pipe length thinking of running in the same rpm range. I'm really not seeing the RPM or speed I think I should.
boat is a GP310, NR5p small volume head, AB 21 pipe, sholound x442 with some barcut,. 66% torco fuel.. would the pipe being too short lower rpm?
should I add length to the pipe or reduce prop to a 440 or 1440?
Would you actually begin to loose top speed rpm? burn plugs?
I have a sp21 that i know is running a strong engine. IT's a 70mpg motor in the rigger. In my sp21, I have less prop, but I am running the same pipe length thinking of running in the same rpm range. I'm really not seeing the RPM or speed I think I should.
boat is a GP310, NR5p small volume head, AB 21 pipe, sholound x442 with some barcut,. 66% torco fuel.. would the pipe being too short lower rpm?
should I add length to the pipe or reduce prop to a 440 or 1440?
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