Hi all,<br /> I have a question or 2 on fuel useage, I recently finished rebuilding a 25' Wellcraft Airslot, I love the boat in every way, but <br />I need to get it to use less fuel. At current I am using 10+GPH running at around 3200RPM, which is around 18knots. I have a Volvo Penta 280(350 Chev v8) and I have the following options that I can try;<br /><br />-Leave it stock with the 4BBl thats on it<br />-I have a Holley Projection marine unit that is a 2bbl TBI system, I think it would be nice but to many things to go wrong on a boat.<br />-I have access to a 2BBl manifold and carb<br /><br />Out of these three options I like the idea of going to a 2bbl and running it like that for simplicity(I am 45 miles offshore alot) but <br />I am not sure what this will do to the overall performance of the boat, I am looking to maximise my fuel efficiancy and still be able to run around 20knots!<br /><br />So any of you have any ideas which I should try?<br /><br />Also I notinced the other day that I have a Stock GM HEI distributor in the boat, and where the computer is supposed to hook up(There is <br />no computer) there is a jumper that forces teh distributor to run at base timing which is 10 degrees, will I get better fuel effeciancy by <br />installing a distributor that advances to 28degrees like its supposed to?<br /><br />Thanks for your time!<br /><br />John