I realize this is a broad question with many variables but I just would like to hear some real world speed increases via supercharging.
If you care to share your gains it would be interesting.
If you wouldn’t mind, list your before and after speeds and also the boat size along with the boost level.

Just curious


Thanks,
Dave

12 mph

Engine was a crate 502. Blower was a twin-carb 250 running 3-4lbs.

Boat was a 1989 Formula 242.

Going from single-carb 174s to double carb-250s on my current boat (1990 Cafe Racer) I picked up 9 mph.

Bank account went from .. oh wait get the calculator out, not installed yet.

27' Fever. HP465 pre blower
24" 69-70mph 5200rpm.

With blower at 5#,
27" hydro, 83mph@5500
24" " 79mph @ 5700

Come on now Dave, you know that will get you in the speed range of the 'tap tap tap on the shoulder'...

Rick

29 Warlock 502 efi - 63mph @5000' altitude

after whipple with 5 lbs - 79 mph gps

Damn Ko KO that a sweet pick up MPH I was thinkin of putting 1 on my 28 sunsation 502 all stock

Go for it Capo, you'll love it. Put mine on myself working slowly over about 6 days while I was waiting to get reprogramed ECU back from Whipple. Fired right up on the hose with no problems - took it to the lake and ran great right out of the box - no dialing in other than getting the right prop size. Has run great for 2 seasons - sounds like an F-16 when you get into boost and it throws you back into the bolsters. Yet gets better mileage when out of boost than before - you gotta love that.

27 warlock 502mpi 72 before, 85 after (vortech).

What drive are you running? I have a stock Bravo1.
I keep hearing my drive will self destruct?