Velocity 280 prop
 

Still working out some bugs with the new setup in the Velocity 280. 496 stroker, 601hp and 605ft/lbs. I'm running a 28p bravo1 4 blade right now, runs 76mph on gps at 5500-5600 rpm. can still get up on a plane with 7 ppl on the boat as i found out last weekend. any insight as to where i'd end up if i put on a 30p? any specific prop anyone could suggest for this boat specifically? 5 blade maybe?

Nice talking to you today.
Let me know how the rest of the testing goes and if we should send out some test propellers.

Brett

Thank you. Your help is much appreciated. Ill keep this post updated with what i find

Labbed or stock?

Stock at the moment

If your running a true 28P stock Bravo @ 5500-5600 rpm, a New Bravo FS 30P pro finish as they come from factory, should turn 5400-5500 and get you 79-80mph with nearly same acceleration and with less trim input.
If you want 5600-5700 rpm with as much if not more acceleration get a 29P, Teaque Marine has them on sale.

High slip is not good, but your out drive will last longer, if you can get on plane good and boat handles good, all will last longer.

I gained 4-5 mph going from a 30P stock to a 31P & 32P Bravo FS, these props have more blade rake, exhaust hub cut down, which should help prevent lifting rear of the boat at high speed and these props get on plane very well and a medium finish, so they hold up to the horse power without throwing a blade as some thin bladed lab props sometimes do through hard use.

Just my 2 cents and what's worked for me !
Running 96mph with stock Bravo One gear case on 2 GPS units, now ready for SC Imco lower ,Bravo One lower is at its max and ready to blow out.

Thx for the info. It's good to know others have kept the stock bravo one outdrives in one piece if treated right. I try to baby mine

You can keep them going ,last boat was 500+ HP on stock Bravo gear case, but this one is a completely redone Max Marine Worx unit.

All the guys I know running velocitys run Hydromotive Q4

What's your drive height? I'm running the same setup on my 280 and at 75 I am about 5000 rpm. I am running a Hydro-motive nose cone which could be improving the hydro-dynamics.

R015, what power are you running to get to 96 mph ?

Just thought I'd offer a little clarification about the FS propeller.

Bravo 1 FS propellers are a combination of adjustments we started doing back in 1998 when I was still at Mercury Racing. So is the XS and OC. These props use adjustments/tweaks we did during Lab processes for the Bravo 1 props for years. We still do these adjustments today as is needed. Point is these props are really nothing new as far as technology but rather marketed as a specific model.

Yes, the FS has a shortened diffuser ring which decreases stern lift and can slightly help trim reaction. It can also decrease or increase planning ability depending on the boat.
No, the propeller does not have additional rake angle.
The rpm difference is aprox 100 rpm higher than a stock Bravo 1 of the same pitch.
The blades are thinned but only from the center forward and are not Labbed to exacting numbers.

BBLADES offers a propeller made from the Bravo 1 casting called our OB/F. This prop has all the features of the Bravo 1 FS, XS and OC in 1 propeller. Here is a link to the OB/F. Also, you can test our OB/F without purchasing it for a test fee of $45.

http://bblades.com/shop/bblades/bravo-obf/

Brett

Just to clarify we have always gained 200+ rpm pitch for pitch with stock Bravo and Bravo factory FS using anything from 28-32, so 1 pitch more will match up at a minimum. I got lucky on 2 different boats and it made 11/2-2 pitch gain at same rpm and same slip (give or take).

Thanks Brett appreciate your input, its always good to compare.

r015,

Anyone who knows me knows......I just report the facts to the best of my ability. That's my job. No BS, just what I have lived and have seen and have been part of. Although some things have changed since I had the reigns of the Mercury Racing propeller Lab, not much has changed.

That being said, all identical boats are different. Been saying that for a few years...or decades too.

The point was deeper.

Labbing to match the boat is the ultimate adjustment prop wise. Bottom line is, if it works, use it.

Brett

B