|
Originally Posted by Chris12
(Post 4614825)
TeamSaris How much below or above bottom
is the shaft ? |
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? |
Wow, that is amazing |
Originally Posted by TeamSaris
(Post 4614859)
Honestly it's as high as we can get it and it's still a little too low. Other than that, not totally sure.
|
Originally Posted by IGetWet
(Post 4615040)
Very cool. Looks like it’s got to be pretty close to the bottom, maybe a couple inches under. How’s it run with the 4 blade, bow lift etc...? |
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. https://cimg5.ibsrv.net/gimg/www.off...d2d8b6ef0.jpeg https://cimg6.ibsrv.net/gimg/www.off...5b7300b80.jpeg https://cimg7.ibsrv.net/gimg/www.off...a2a074aa6.jpeg https://cimg8.ibsrv.net/gimg/www.off...d8d9ca28b.jpeg https://cimg9.ibsrv.net/gimg/www.off...985572e8c.jpeg |
Originally Posted by IGetWet
(Post 4648119)
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. |
Originally Posted by TxHawk
(Post 4648362)
What RPM and how fast? Its not 100% of the time, but a lot of the fast single Vee's run a LH prop.
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 |
| All times are GMT -5. The time now is 03:38 AM. |
Copyright © 2026 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.