single v bottom with #6
03-09-2018, 06:05 PM
#134
Registered
03-10-2018, 08:06 AM
#135
Driver-441
Racer
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.
09-08-2018, 12:38 PM
#136
Registered
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.
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.
09-10-2018, 09:21 AM
#137
Registered
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.
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.
09-10-2018, 12:12 PM
#138
Registered
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.
09-10-2018, 01:07 PM
#139
Registered
Join Date: Apr 2013
Location: Lake Winnebago
Posts: 203
Likes: 0
Received 0 Likes
on
0 Posts
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.
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.
09-10-2018, 01:53 PM
#140
Registered
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.
