First, thanks to all of you that helped me figure out what the heck I was doing. I finally got the AA on and ran it this weekend at the polio pond. Beyond choppy, but still got good numbers. My RPMs will not go past 4500-4700 WOT and speed actually increased 3 MPH. It used to hit my rev limiter at 5400 and not go as fast. Needless to say, I was pleased with the results. I still think there is another 5 MPH to be had though. My thoughts are now on getting more of the boat out of the water. I want to off the jet-o-vator and get a place diverter and ride plate. Does this sound like the next logical step in my quest? Remember, this is an Ultra 21 LX, the one with the cockpit forward for more seating in the back. I think my fat ass and friends are not getting high enough up out of the water. Ideas and suggestions are welcome. Used diverters even more http://free.***boat.net/ubb/tongue.gif
I knew that double A would be good for you. I don't know about getting rid of the jet o vator. They are pretty much the same thing. Place is just a newer. If you want a ride plate you need a split bowl not sure what you have or you can have yours tapped like HBjet did to accept the turn buckles. Good luck
Originally posted by Bense468:
I knew that double A would be good for you. I don't know about getting rid of the jet o vator. They are pretty much the same thing. Place is just a newer. If you want a ride plate you need a split bowl not sure what you have or you can have yours tapped like HBjet did to accept the turn buckles. Good luck
Bense,
I would venture to say that there are more ride plate installs using tapped holes than afixing the turnbuckles to the steering adapter flange on a G bowl. What I'm getting at is that you do not need a split bowl to run a ride plate. In fact, the ride plate on my boat anchors the cradle under the bowl with two bolts that drive into tapped holes in the bowl, and I have a G. I'm not giving you crap just putting the straight info on the table. http://free.***boat.net/ubb/smile.gif
As for BowTieRick's orriginal question, the bigger hastle will be pulling the intake to machine it for a shoe and rideplate. I feel that you would be heading in the right direction by going with the shoe/rideplate combo in conjunction with a diverter. This will give you the most control over the setup of wetted parts and ultimately your ride attitude. It sounds like its time to pull the mill, install the blower and send it off to the dyno so you have a little time to pull the intake and get the shoe and rideplate done up. http://free.***boat.net/ubb/wink.gif
Good luck,
Chris www.liquidaddiction.net (http://www.liquidaddiction.net)
bowtierick, What speed are you running at 4700 rpm now? I have an A in mine and it runs 70mph at 5200 rpm. I bought a blower last week and expect it to push the rpm well over 6000, which is faster than I want to spin it, so I will probably end up changing to an AA also. Does it seem to accelerate harder(faster) with the AA?
Thanks
Chris, did you email that guy about the blowers? I bought one of the polished 250s he had and it is in excellent shape. Cant wait to get it on the boat, but we have weekends planned around the boat for the next three weekends, so I wont tear it down till after memorial day.
Scott
Originally posted by BowTie Rick:
I want to off the jet-o-vator and get a place diverter and ride plate. Does this sound like the next logical step in my quest? Remember, this is an Ultra 21 LX, the one with the cockpit forward for more seating in the back. I think my fat ass and friends are not getting high enough up out of the water. Ideas and suggestions are welcome. Used diverters even more http://free.***boat.net/ubb/tongue.gif
your ok with the Jet"o"vater- Look at Place on his Droop-Ride Plate system. This will cover 2 functions for you. 1" drop on thrust line lifting your tail & 2 ride plate. Also have you looked at your bottom.
I don't know if you are heavy- if so, you are getting lift from the larger Impeller. If not and are average wght. look for other-you should be able to get more MPH on say a "A". Not talking about your ass just hull weight and distribution.
I have a AA cut in my Legend pushing a Caliber 1 230. Pump is setback with a rideplate and hydraulic diverter, spun by a 502/415 HP. Beam is 102", LOA is 21' wet, and 3500lb, so I am pushing a real load.
Also have a set of Dana tabs - love these.
With 10 people on board I can run 53-54 mph (GPS) at 4900 RPM (based on two tach readings) and have hit 58 max with a lite load. Even with a light load the hull runs pretty wet based on video I've shot.
I have the cab-fwd seating as well, so it sounds like we are in the same ballpark. I know the hull has more speed, it just needs to get more hull on top of the water (and a blower in the future).
I've ridden in the same boat at 75mph with a 540Merlin. Top end is nice, but I'll take my holeshot any day, it is rather strong.
I doubt you'd notice the difference between a PD and a jet-o-vator.
One last thing, check your bottom straightness.
My numbers are similar to gstark's. I can go 53 at 4500 with passengers. When it had the A it only went 49 at 5000. I had the pump looked at by Rick at CP Perf. and Tom and Bob at Rex. No one can see a problem. I am thinking blower time but know HP is not always the cure. I have no idea what the weight is as I built it from a bare hull.
Originally posted by AGGRESSOR JETS:
Originally posted by BowTie Rick:
I want to off the jet-o-vator and get a place diverter and ride plate. Does this sound like the next logical step in my quest? Remember, this is an Ultra 21 LX, the one with the cockpit forward for more seating in the back. I think my fat ass and friends are not getting high enough up out of the water. Ideas and suggestions are welcome. Used diverters even more http://free.***boat.net/ubb/tongue.gif
your ok with the Jet"o"vater- Look at Place on his Droop-Ride Plate system. This will cover 2 functions for you. 1" drop on thrust line lifting your tail & 2 ride plate. Also have you looked at your bottom.
Dave,
I think it is top notch of you to recommend another manufacturers product, but honestly, the PDC ride plate does not work as it should. The plate needs to be an extension of the intake for the boat to get up and ride on, not a glorified non adustable trim tab that just happens to mount to the bottom of the droop. I'm not trying to slam PDC's ride plate, but it would suck for Rick to go out and spend the cash on it when those funds could have been diverted towards a "real" ride plate. Plus with the traditional ride plate setup, he'll also get a shoe machined in and once he starts going faster can have greater control over his setup and intake pressures.
Chris, www.liquidaddiction.net (http://www.liquidaddiction.net)
Originally posted by flat broke:
Dave,
I'm not trying to slam PDC's ride plate, but it would suck for Rick to go out and spend the cash on it when those funds could have been diverted towards a "real" ride plate. Plus with the traditional ride plate setup, he'll also get a shoe machined in and once he starts going faster can have greater control over his setup and intake pressures.
Chris, www.liquidaddiction.net (http://www.liquidaddiction.net)
I agree with the long term if his program is to keep stepping on it. The Machined shoe and ride plate/Cradle is the way to go. Ive only seen Places Ride Plate/Droop in pictures and it seems like a good affordable fix.
If he is into a budget controlled step up program, he has arrived at that point, not only re-machine the intake-also to look at the entry and re work it, before reseting the intake.
V bottom I still think a Std Droop may be well worth while. plus he comes out 7 1/2 degrees up for the BIG ROOST -Dave
Not to start flames here or anything, but I have seen the PDC ride plate work great getting a boat out of the water. It IS adjustable, and with a little creativity you could absolutely use the mount for the ride plate to mount a more standard version. I would recommend this setup for anyone short of a racing set-back design that needs the shoe for other reasons. Cheap, and works great.
I gained a ton of speed adding the PDC droop, and the roost is phenomenal.
Good call Dave... you beat me to it!
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