Need help w/dual outboard cat setup!!!

[forescott]

Some of you may have seen my build thread....http://forums.offshoreelectrics.com/...ad.php?t=18941
Its a 31-inch proboat thundercat with twin counter rotating stiletto outboards w/ ul-1 motors, turnigy 120 esc's and x442 props on 4s lipo. The motors are mounted so that the prop shaft is center lined with the bottom of the hull. No matter where I move the batteries the nose is getting pushed down pretty hard and running super wet. Today I put the lipos all the way back in the hull. On take-off it points straight up in the air and was difficult to get on plane but it seemed to run pretty level at about 15 mph. But the faster I push it, the more the transom lifts and pushes the nose down. I know its not a c.o.g. issue but a motor height/angle issue. In all my testing so far I've just been making small adjustments to the drive angle only, always running neutral or slight positive. My question is are the outboards mounted too high or too low?? Here are a couple of crummy videos, but its all I have.

[Make-a-Wake]

I think the height is about right...........maybe a hair lower would be better. But my opinion is that the motors need some positive angle compared to where they are now.

[forescott]

I tried that, they just cavitate and the boat won't plane.

[Make-a-Wake]

Then I would suggest lower them and still a bit of pos. .........................couldnt hurt to try. Just sorta play with it.

[FloatDaBoat]

Looks as though the cavitation plates on the lower units are acting as hyperactive trim tabs,i.e., the prop wash deflecting off of them is forcing the nose down. Wild A$$ guess !!!

[tiqueman]

Im going to go w/ Make-a-wakes suggestion, lower them and more positive.

[carlcisneros]

I would lower the outboards some as well.
Also, what props are you running?

[forescott]

de-toungued octura x-442's

[forescott]

Maybe those cavitation plates should be running even with the bottom of the hull?

[Doby]

Scott;

I have a TC 31 converted to brushless with a 1521 1.5D on 4S2P. It pushes it to just over 50 MPH but also runs wet (well really flat anyway). I've tried moving the strut, batteries etc all over the place and it always seems to run at more or less the same angle (flat).

It might just be the nature of the beast to run that way!

[Doby]

Heres a vid for comparison.

http://www.youtube.com/watch?v=0WHYeVcmuLw

[forescott]

I also ran this exact hull with a castle 1515 @ 53mph. This is different, Hard to tell by the video, but it lifts really hard @ the transom. So much so that any turning input @ speed and the front end dips and hooks. These outboards are really beginning to frustrate me!

[forescott]

Same boat w/castle motor

[Kris Flynn]

Scott,

IMO raising the motors will help, but I would say that there is alot of lift being generated by your lower units.

Kris

[Eodman]

Eveything I have read or have seen says the cav plate should be even with the bottom of the hull! Then tilt the motor away from the hull in small increments!