Hi. First post. Which older Sunseeker? (Or other brand)

[PatEire]

Hi Pat, the reason the Superchargers were disconnected was because of the J series props that were fitted. We didn’t need the extra power to get the boat onto the plane, plus I think 1200 to 2600 rpm the supercharger is on constantly on the Kad42. Above this rev range (I might be wrong on these figures but it’s there about) the Supercharger disconnects and the turbos take over. The reason for disconnecting is that I can have the boat at 1200 to 2400 rpm with no supercharger whine which some people on here have complained about in the past. However there is also an opinion of some people that in disconnecting the super chargers I’m at risk of gumming up the engines due to unburnt fuel as the Engines do not have any form of Electronic Fuel injection so cannot change the Air fuel mix. But I’m no expert in that field, all I can say is Boat had it fitted when brought, we have had her three years, regularly take her out and have had no issues as of yet. Again though, if I have full load of passengers, fuel, water and the boat is heavy then I can manually kick in the Superchargers to give her a little kick up the backside to get her onto the plane.

Thanks Matt
I understand what you're saying.
I've heard the supercharger whine on videos, and it doesn't sound bad to me.
Maybe if I was listening to it all the time it might grate a bit.
Can I ask what's the difference with J series props compared to previous?
Was the difference between the kad41 and kad42 basically the supercharger then on the kad42?
30hp extra on the kad42?
Great info and thanks.

 

[matt8442]

Hi Pat,
I believe the J series Props reduce higher RPM but give the boat more bite or in this case gets you up to spped quicker than the older D series props. But whereas before Id be doing 36 knots, im now doing 33 knots. As for TAMD 41 engine I believe its the additon of the Supercharger thats one of the differences and as you've said its about 30 hp per engine difference.
Again Im no expert, just quoting what Id heard or read from other forum members on here. So long as I dont sink my boat, or blow up my engines, or lose a crew member,or damage anyone elses boat then thats a good day by me!
Matt

 

[PatEire]

Hi Pat,
I believe the J series Props reduce higher RPM but give the boat more bite or in this case gets you up to spped quicker than the older D series props. But whereas before Id be doing 36 knots, im now doing 33 knots. As for TAMD 41 engine I believe its the additon of the Supercharger thats one of the differences and as you've said its about 30 hp per engine difference.
Again Im no expert, just quoting what Id heard or read from other forum members on here. So long as I dont sink my boat, or blow up my engines, or lose a crew member,or damage anyone elses boat then thats a good day by me!
Matt

Thanks Matt.

Great info for sure.
I'll keep perusing and seeing what's out there. I don't think there's any rush now to get to Mallorca, but you never know ?
Your philosophy should be a great day for anyone.
Appreciate your time.
Pat