wow! 6700 rpms what kind of speeds are you getting? Im running 1.24's and if I went to 1:36's I would probably need 36 4 blades minimum. Right now my drives are 2 deep to run 5 blades, I would have to remove the spacers.

If I can ask, why are you saying that? DOes the Tunnel tab make the boat real loose? To be honest this boat of mine makes me nervous enough as it is, I dont need any more fear, can you fill me in a little in regards the the tunnel tab? In regards to the Chris Cat, the center of gravity point is alot different, the fuel tanks are right under the driver seat and passanger, where the AO they are in the back of the boat.

Mine are 1/2 inch below to hull with -2 Imco lowers. 1.32 drives 5200 rpm at 113 mph with 32 pitch Bravo 1 props that have been cleaned up but no pitch change. No tunnel tab no boxes.

Charlie I tried to call over the weekend, no answer I will try again tonight.

130

That's why I recommended that you call Sparky and get the info first hand. I am NOT saying that you should not consider a tunnel tab. By the way, Sparky is not the only Cat builder to have told me to NOT use a large hydro type of tunnel tab.

Do you mean that the fuel tanks in the Chris are in the sponsons, with the front leading edge just forward of the front seat? AO fuel tanks have them in the back of the boat? Any pics of these?

In a AO they are in the sponsons. They start at the rear bulkhead and run forward to the step down hole in the floor to get into the cuddy. 2 52 gallon tanks. I might be wrong but i thought a Chris Cat is the same. I know Greencards are the same size I guess I am not sure of the location.

yup thats the way mine our too but th3 1992 ao that i have that im re doin has 4 fuel tanks 2 in front sponsons im goin to use them as ballast tanks with pump to drain water and pickups to fill them when running its goin to be on 5's and boxes with crashboxes 632 blown big chief head tall deck merlins should run the number 1.24 gears

that sounds like you are gettin serious....

Don

Just leave them as fueltanks and pump the fuel back and fort,,,,,why add extra weight if you can use what you have .

:drink: