Prop vent tubes help!
 

I've got a 2000 25' Daytona with 1100 hp and a Bmax drive and I've had nothing but hell getting up on plan. Right now Im only running a Bravo 28p 4b and it's still such a dog getting up, but once the boat breaks over I need more like a 32p 4b and I'll never be able to get up with that. I've talked to a few people that told me that vent tubes (like the ones you would see on a #6 drive) would help a lot.

My question is I'm not to sure on how to set it up with a bravo style outdrive. A #6 drive has a ton of room on the cavitation plate and mine doesn't. I was going to have a Y pipe made with 1.25" to 1.5" pipe that will bolt on the the upper section right in front of the trim rams.

If anyone has some pictures of there setup that would really help!

Thanks

Anybody?

We can put huge vent holes in your casting and do a custom exhaust tube to the prop.
The vacume created by the pressure differential may be enough to get you on plane quicker. If not it will not hurt.

Call me if you want and I can explain the adjustments.

Brett

Also there is one person on the board, can't think of the name off the top of my head, but he runs a adjustable cav tube I believe. He can add or take away air to the prop.. maybe he will chime in, as I also think this is on the 6 cyl elim.

John jr

Have you considered trim plates in the steps of the sponsons. They would aid greatly getting on plane. Had a good friend put them on his 27 Fundeck and it made the world of difference. He has a 525 and it was a bear getting on plane before (not enough power), then after, right on plane.

I found some pics of a custom tube on a black hawk. Pm me your email and I'll send it. Can't post with my phone

Tubes

Well, bought a cheap ass radiator hose with a 90 bend at the end and stabbed it on with some zip ties and hose clamps...it let the motor spool and it planed with a prop that it wouldn't plane with before. The tube was about 1.75" ID. In short it works. My next step is to buy couple smaller diameter hoses and experiment as it needed more bite. After that I will fab a stainless one.

Cool. Get us some pics as you move forward.

Brett