It's getting interesting....strange might be a better word. Ran the smaller pulley today. Motor ran great, but again, nothing more than 5000rpm with the 15.625" diameter 30 pitch Maximus, same results as the .5" bigger pulley. Not ideal conditions but I was able to trim her up and air her out more than once. The last 1" or so of throttle movement doesn't do anything. It's almost like it cannot over come the drag or load of the scx upper and lower once it reaches 80mph. I've put the 30" labbed bravo 1 back on and will see how high I can spin that up now. The problem with that prop is the complete lack of trim reaction.

Some tell me the drive is too deep for a 5 blade, 2.375" on a 12" extension box, saying the box accounts for 3", so the proshaft is like 5.375" below.... if that were the case I don't know why I can't get better than 20% slip with a four blade. More testing

Do you have O2 sensors or anyway to check the tune on the water? Still doesn't make any sense but it's all part of dialing in!

I know you want speed but at least you are reliable, especially on that last poker run in the rough!

Talk to Brett at BBlades about a little "Baja Cup" on your Bravo I.

I don't agree Knot.....the "Baja Cup" marketing recipe is fine for a base model stock Baja......this boat is way more advanced so what works on it might surprise us all.

77 still aint bad, that moving in your hull. You will have the fastest 25 out there after you tweak a few more things...

Sounds like you are too high for the Bravo and too low for the Maximus. FWIW I think the Bravo will need cup and rake and the Maximus will need to be cut down and cup and rake. It sucks but whether or not a prop works in its stock form is no indicator how it will run after its labbed. At least in my scenario, the Bravo wouldnt even get on plane - after labbing, it was the fastest prop.

Not to be a pansy but be careful with the props that dont carry the bow (with high slip). Bow steer sucks! I tried unlabbed bravos and at 76 MPH they bow steered - Not a good feeling.

Got a buddy with a 33 Outlaw with 600 HP Brad Smith mills and IMCO boxes. Tried Maximus and P-5X's and neither would carry the bow. A 30" non-labbed Bravo I with the Bravo Cup from BBlades was the only prop to get the nose out of the water and carry the bow. Best all around prop and gave him the best top end even though the calculated slip numbers are high.

Spent probably close to a hour talking to Brett and Brad at BBlades today. A lot of knowledge there when it comes to prop setup! In their experience they agree about the 3" extension box not equating to 3" of propshaft elevation, more like 1" maybe. I thought the water rose 1" for every 12" of set back, but it may infact be much more. So it's possible that I have this drive too low in the water. The only way to really know would be to mount the go pro on the transom and mark measurements on the lower some way to reference where the water level is at on it.

First im going to try the labbed 30 bravo 1 I have again. I didn't give it much test time before because of the high slip -25%, and the lack of trim leading to bow steer that Keith Atlanta mentioned. Almost opposite of the Maximus. I could get the boat tip toeing on the pad with the max if I wanted to. Felt like a really big hot rod outboard from my younger days. The bravo 1 I have was labbed by Bblades for a 26 outlaw with a 600sci so it has their "Baja recipe". But the diameter of the bullet on this lower may be too much for any 4 blade now matter how much cup was added.

Another thing we talked about was if the throttle blade was actually opening all the way. From what I can tell it maybe a little bit shy of fully open just from eyeing it up. TPS voltage is right on with the blades closed, 4.50v, range is 4.45-4.55v. At full throttle tps voltage is right at .999v- 1.00v. When adjusted to where the blades looked perfectly perpendicular to the throttle body the voltage was .78ish, so not much difference there. Don't think that'd add up to 400+ rpm.

Thanks for the help guys!

Whats the serial number on the Bravo 30? Give it to Brett, he can tell you if its turned up or down and what the rake is...

You sure you shouldnt be at a 28 Bravo for testing? Heres why. I am running labbed 28's up to 84-85 MPH, this is a twin - I am getting half as much water to the prop and I think I am at 16% slip (cant remember) but its a lot less than 20. You are off by 400 RPM. You will pick up 200+ RPM with a 28 pitch over the 30 and probably some top end torque/horsepower and might get you the 5+ MPH you are looking for.

From what other higher hp 25s are running I should be able to spin a labbed 30 right up no problem. Haven't tried yet we'll see. I did run it up to 5150 no problem on a smaller lake before I had to pull out. That was when the bypass valve still had the leak.

The scx is what makes my setup almost impossible to compare to any other....

Great read...... I think you are on the right path with the bravo 30. If you can't turn the 30 let BBades turn it down.