Hi! This is a question for Carver 390 owners who may have put Flowscans on their boats, and are powered by with Crusader 454XLs. What are the best rpms you've found for fuel economy on/off the plane?

I've been running mostly just below hull speed, and unless I've been consistently goofing up my calculations when I fill up, my economy has been really good (about 4gph combined when running at 7 - 8kts).

At a little less than 2mpg, I'm pretty happy with that. On a run, I'll put it up on the plane and get about 14kts at 3000rpm for 5min or so to clean out the carbs, but I like the economy at 'trawler speed'.

But...if any of you have some reliable flowscan data at planing speeds, I'd love it if you share them.

On another geeky note, what do you think the minimum planing speed of a Carver 390 CPMY is? I have a 1994 model, and I'm trying to figure out the minimum planing speed before it starts to 'mush' and just push gobs of water (which obviously isn't good for fuel economy). At 39' LWL, I guessing Hull Speed is just under 8kts.

Thanks!