BD,
Since your question about getting the boat on plane is really about optimal
fuel use, I'm wondering if you have fuel flow meters on the engines. If
not, check out this link where several different manufacturer's products are
shown:
http://www.boatersland.com/fuelflow.html


"Big Daddy" wrote in message
m...
Hello. I have a 29' Chaparral (great boat) with twin v-6's and Volvo
duoprops. It comes on plane extremely fast if I work the trim tabs
full and use the outdrive tilt. You almost don't even know the bow is
raising!

My question is...in lieu of the damn gas prices, I'm wondering if I
could get better mileage if I added larger trim tabs so that the boat
would plane at a slower speed. Right now, I have to get it to 3,000
rpm's to bring it down on plane.

Any thoughts?

Thanks!