blacksapphirez
Jetboaters Captain
- Messages
- 1,170
- Reaction score
- 943
- Points
- 237
- Location
- Charleston, SC
- Boat Make
- Yamaha
- Year
- 2020
- Boat Model
- SX195
- Boat Length
- 19
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When I tested zero spacer, the performance was very similar to stock. Increasing spacer count produced a better holeshot (slightly less cavitation) to a "point"; with a sacrifice of top speed (approx. 3-5 mph). I found the point of diminishing returns when going beyond the equivalent of the red spacer thickness. Any other combo going with greater thickness I saw NO gains in holeshot, BUT, did see a drop in top speed. Cavitation (slip) remained the same from just the red spacer or additional spacers. I know, it seems confusing (plus I've had a few beers); I hope I'm clear with my experiences. Please let me know if you have any other questions. Again, these are just my experiences.What about running with zero spacer?
Man, I would love to have a reliable 450 hp. I need more "get up and go" power when coming out of turns; especially when loaded down and tubing the kids, etc. What sort of mods did you do to the engine to achieve this number? Any reliability issues? Motor still start easily? Fuel consumption go through the roof? The extra power and being able to "hook up" with the Solas would be the ticket.My ski is somewhere around 450hp with svho and i have zero cav no matter how fast i hammer the throttle.
So just buy a maptuner from Riva? Would they have a specific map for the boat or just use one for a ski?mods were 1000cc injectors, titanium valve retainers, sc wheel and shaft, ribbon delete, fizzle intercooler, cold air intake, tune. the svho doesnt take much to uncork it. i would however never do this on my boat. the fuel mileage would just drop like a rock. i only get about 45min ride time on 18 gal of gas with the ski. if your trying to get the boat to hook up better then there is nothing better you can do than change the impeller. nothing will increase your top end speed though other than engine mods. the best bang for your buck and where you will see the biggest performance increase for speed is just with the tune. you can leave the whole motor stock and the tune will just uncork the motor. no reliability issues with my ski and the ski starts just like a stock engine.