Water injection, very novel. I'm going to explore water injection sytems a little further. How long does a typical tank of water last?? 1 hour, 4 hours?
I use my boats any chance I can get. My last boat received 400 hrs use in 2 years. Dockside ROT is a big problem for sure. I will be keeping this one at home on a trailer and flushing with freshwater following any use and fogging the engine when it's layed up for any period.
I'm working in Imperial gallons for fuel consumption. So 8 US GPH = 6.5 Imp GPH. Your boat is heavier and your running it a little harder so I think I'm still in the ballpark at projecting 5.5 Imp GPH fuel consumption per engine.
I'm rethinking specs for engine based on the great information everyone has provided. Thanks! I'll start a new thread with the new specs for discussion.
To that end, I'm reconsidering my position on fuel injection and engine management systems. An integrated engine management/fuel injection system would allow me to eliminate the distributor and replace with individual coil-near-plug ignition. I would also be able to replace mechanical fuel pump with an electric one and exchange the carb with a throttle body injection unit. Couple all of this with a knock sensor and I could raise the compression to 9-1 and have fully programmable control of fuel flow rates and ignition advance curve. Bad load of fuel, no problem, the system will look after the engine and ensure no detonation. This should improve fuel economy as well.
