Squirtcha?
11-26-2003, 08:51 AM
Here's what I'm attempting to do this winter. My setup was as follows.
Setback pump
Shoe approx 1/8" down from center keelline
Rideplate 4.7 degrees up from keelline when shoe is at 0 degrees
3 degree wedge up
speed loader
Here's the results
max speed is 73.7 mph with diverter positioned for 3'-4' roostertail. The boats riding pretty high and handles well.
However, if the diverter goes to full up, the boat pulls hard to one side (can't remember which side though). I hardly ever run around with a full rooster so I wasn't too concerned about the pulling, although I know something isn't right.
I won't include the nitrous results as it's really not too important. If I get her dialed in without the nitrous, it'll just add to the max speed when it's introduced (or at least that's been the case so far)
What I'm attempting to do is flip the 3 degree wedge in an effort to lower the thrust line more than it is currently. Keep in mind that the rideplate was below the linkage when the wedge was installed up (I haven't adjusted the rideplate for the new wedge down position yet). It did appear that the linkage for the diverter may have been dragging in the water when full up and may have been causing the pull I was feeling.
Here's some pics and as you can see, I'll have to lower the rideplate quite a bit to clear the diverter linkage. Most the photos of race boats (semi-v's) have the wedge down and not up. That's kinda what's driving all this.
http://jetboat.homestead.com/files/pumpsetup_diverter_down.jpg
Here's a picture with the diverter full up.
http://jetboat.homestead.com/files/Pumpsetup_diverterup.jpg
Anybody that has some semi-v setup experience and wants to toss out some advice.......................I'm all ears.
I've tried dropping the shoe down an additional 1/16" and I lost about 3 mph and felt a draggin when I got off the loud pedal so I think I've got all the shoe in the water that I need.
The boat may have been setup as well as it could be, but I've got to play with something. Thought this would make a good winter project. I can always put it back together the way it was, as it's all documented and easily reversed.
Setback pump
Shoe approx 1/8" down from center keelline
Rideplate 4.7 degrees up from keelline when shoe is at 0 degrees
3 degree wedge up
speed loader
Here's the results
max speed is 73.7 mph with diverter positioned for 3'-4' roostertail. The boats riding pretty high and handles well.
However, if the diverter goes to full up, the boat pulls hard to one side (can't remember which side though). I hardly ever run around with a full rooster so I wasn't too concerned about the pulling, although I know something isn't right.
I won't include the nitrous results as it's really not too important. If I get her dialed in without the nitrous, it'll just add to the max speed when it's introduced (or at least that's been the case so far)
What I'm attempting to do is flip the 3 degree wedge in an effort to lower the thrust line more than it is currently. Keep in mind that the rideplate was below the linkage when the wedge was installed up (I haven't adjusted the rideplate for the new wedge down position yet). It did appear that the linkage for the diverter may have been dragging in the water when full up and may have been causing the pull I was feeling.
Here's some pics and as you can see, I'll have to lower the rideplate quite a bit to clear the diverter linkage. Most the photos of race boats (semi-v's) have the wedge down and not up. That's kinda what's driving all this.
http://jetboat.homestead.com/files/pumpsetup_diverter_down.jpg
Here's a picture with the diverter full up.
http://jetboat.homestead.com/files/Pumpsetup_diverterup.jpg
Anybody that has some semi-v setup experience and wants to toss out some advice.......................I'm all ears.
I've tried dropping the shoe down an additional 1/16" and I lost about 3 mph and felt a draggin when I got off the loud pedal so I think I've got all the shoe in the water that I need.
The boat may have been setup as well as it could be, but I've got to play with something. Thought this would make a good winter project. I can always put it back together the way it was, as it's all documented and easily reversed.