We started out 3" above the bottom. The boat bow steered. I didn't try a 5 blade because more blades causes more transom lift and that was already the issue. The top speed was 120 with 16% slip.

We ended up 3 below the bottom. The boat was a straight bottom with a notch. I ended up using a 3 blade. My setup didn't even like a 4 blade. I probably could have come up a little (maybe a half inch) and reduced the slip but I decided 120 was enough .

A 1100-1200 HP engine and the Velvet 72L-HP is waiting in my workshop.
The one starts above and ends below bottom. The other starts below and ends above.
​​​​​​Think it's difficult to say what's best for me now.
😂

3"

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We re-rigged this Squadron last year. Runs so nice we have another client buying a 27 so we can do the same setup.
1200EFI
SSM6
100+ through anything

that little rig is sweet. :ernaehrung004:

TeamSaris How much below or above bottom
​​​​is the shaft ?

Honestly it's as high as we can get it and it's still a little too low. Other than that, not totally sure.

Very nice setup!!
I want to realize a similar project now.

​​​​​​​Would say it is above bottom or?!
Wet sump upper and dry sump lower? What gear is in the drive?

Could use a little more. It can get a little bow-steery in the high 90s but its not bad. It needs more prop all around to be honest....it's on the limiter hard. But the acceleration is genuinely mind blowing plus with the small wheel its a breeze at the docks. Always a trade off. The owner is a smart guy. No reason to push this thing to 110....get a bigger boat lol.

Bringing this one back just because it’s an interesting read. 2005 25 Outlaw 509ci Whipple, was a 525efi but bored to 4.5” and a couple other changes. Boost pretty low at 6psi. Haven’t had the motor dynoed but I was told when I bought the motor 775hp.

Current drive setup now is a scx4 #6 shaft .25” below the pad, 12” extension box. Runs better than it did with the scx 2.25” below. More torque steer that I’ll have to address but actually have better trim response. I’ve ran a Maximus, 5 speed, 4 blade cleaver, 5 blade round ear cleaver, and a 4 speed. Best prop so far is the 17” diameter 5 blade round ear cleaver. 5 blade bravo style props are actually about the same slip as the 17” cleaver. The issue I have now is as I trim the slip increases negating any speed increase, rpms climb but that’s because of more slip. Same speed if the trim is in all the way crushing the waves with the front or if it’s riding on the top. Might have to try a spacer or modifying more props... One thing that gets me is how do the bravo style 5 blades hook up as well as a 5 blade cleaver with cup added in the rounded ears? Lots of testing and tuning trying to do something like this.

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What RPM and how fast? Its not 100% of the time, but a lot of the fast single Vee's run a LH prop.

5400rpm at 83. 17x30 5 blade cleaver. I should be at 5600-6000 so taking some diameter out should increase rpm. Both time out testing props have been windy pretty rough days, so not ideal conditions.

What benefit does a left hand prop have? I know the single fountains like left hand rotation. I ran a left hand prop a couple years ago just because I couldnt find a RH 26 bravo. Boat leaned to starboard pretty bad.

Depends on the pad design of the hull......some hulls have the pad offset of the center-line to help counteract prop torque on single engine boats.

On a hull without a pad (like your Baja) I would believe a right hand rotation prop would be more advantageous since it should help counteract some engine torque (different directions).

Having said that I thinks a bravo is slightly stronger/more durable in one direction vs. the other...but dont remember which (likely when the bottom of the upper gears is engaged)............so that may influence single engine boat prop rotation selection as well.

The 25 Outlaw has a pad and a small notch, pretty sure it’s not offset. I believe the bottom gear is the forward gear in RH rotation.

https://cimg3.ibsrv.net/gimg/www.off...d1384fdf4.jpeg

Yup the lower of the two upper gears is the forward gear on a Bravo for RH rotation.

I stand corrected....I thought I remembered them (bajas) being sans pad.

I think Nordic had either a 6 or and 8 on their 21 foot ski competition boat. I saw some test video of it hauling the mail a little while back.