Need help with my boat acting like flipper

[Roland Murphy Jr.]

My AVALANCHE shoots out of the hole great. It flies like a down hill racer. It also cruises good above 30MPH. But go any slower than 30 and get around 3000RPM it starts jumping around like flipper trying to get a fish from the trainer! Will a Hydrofoil help? I have a Stingray that is on my old 50 HP. I can trim way down and stop the porpoising but it loads the motor up pretty heavy. I want to be able to run at a low speed so I can get a good look at unknown water when practicing. Now when I'm running at look around speed the bow is plowing a field and I'm throwing a wake that you could surf on. I don't like that. But on the other hand if I put on the Hydrofoil I don't want to lose speed or increse stearing torque. OK AVALANCHE owners please HELP me out. One more thing I did see Dave Winkelman on one of his shows have a hydrofoil on a 175HP on the back of a AVALANCHE. Thanks Green Tarpon

 

[fatrap]

Did you try adjusting the speed and trim? Sometimes you got to experment a little to find the "sweet spot". Other consideration is how your carrying your load. Hydrofoils are butt ugly(IMO) butt a foil hurts top end maybe a mile per hour or so drill some holes and go for it.

fatrap

 

[Greg Duggan]

SE Sport claims that there foil will increas performance and stablize your boat.

i put one on my nx882, it helped to get me out of the hole and it didn't hurt my top end. there is a guy in my club with the same foil on his 20' express, he is running a 200efi.

give them a call, it can't hurt. ( it is the most atractive foil out there)
http://www.sesport.com/

 

[Texas Transplant]

If you are having porpoising problems, a foil will help. Alternately, either trim down or adjust speed accordingly.



On my Stratos, it poriposed badly. Took me 4-6 trips to the lake before figuring it out. Now, it's fine - I had to train the driver. No foil now needed.



Tex

 

[David Lewis]

Hey GT, I live in Louisville and have the Av. with 150. I finally gave up because I had run a foil on an older boat that helped so much, I had to try it on the Av. The old one was an SE 300, put it on and helped. Couldn't resist the Stingray when I read what it said, had to try it. Love mine. No porpoising and low speed planing. Be your own judge. Catch ya on the wet stuff.

 

[Roland Murphy Jr.]

Hey DT we have the same color boat. Nice, You have DC I have the SC. That way we can tell them apart. I'm going to wait until after May to put my Stingray on don't want to void my warranty.

 

[Rick Hale]

Have they come up with a foil you do not need to drill into you motor yet??

HaleDamage