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Ride plate, loader, nozzle, etc...setup help please!?!

6K views 15 replies 8 participants last post by  Outlaw 
#1 · (Edited)
Ok...here's the deal. I'm still a jet-idiot (above all, the shoe is still the part that confuses me the most). I'm spinning a "B" impeller at 5700 rpm, and honestly with some more timing I have another 150-300 rpm left in it. Anyway, in my 21' Liberator with 4 people and full cooler (total passenger weight was 700-750 including me and the cooler was 40-50 lbs) I saw 60-65 mph at 5700 rpm. Maybe that's the "right" speed for my boat, I honestly don't know.
So...I'm asking for input both on what *should* my boat run with that load, and if it should be faster...how do I get there? I will add more horsepower in the future...but for now, lets assume a best case scenario of a "B" impeller at 5800-6000 rpm.

Here's a pic of my nozzle setup and ride plate, it's a 3-4* up angle.



Here's the underside:



 
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#4 ·
There is a allot of good info in here http://www.performanceboats.com/jet-boats/9068-21-daytona-splash-thread.html

You are gonna need to pick up a digital angle finder to get a base line and go from there.Tons of good info on here, you just gotta take your time and search for it.

Good Luck:)devil
I will look there, thanks. And I do have an angle finder. Using the keel as "flat", the ride plate has a 3-4* up angle now.


By chance, did you check the top speed with all the folks and ice chest out?
No, I didn't. I was just so happy the boat was behaving that I just flat forgot.
 
#5 · (Edited)
Is there anything I can read that will explain the shoe to me? I've been told I need a back cut shoe, and that I have a tapered shoe. Honestly, that really doesn't mean anything to me (well, I think I grasp the concept, but what I *thought* was the shoe looks to be made onto the intake?)

Also, when measuring how far my loader sits above/below the keel, do I use the flat part of the keel or the bubble just in front of the loader?


For the mouth opening, do I measure from the front of the intake all the way to the rear-most part of the shoe? How do I change the mouth opening if it's too big/small?


Also...how good are the chances that my rudder is slowing me down?


Can you guys tell I'm a lost pup?
 
#12 ·
Is there anything I can read that will explain the shoe to me? I've been told I need a back cut shoe, and that I have a tapered shoe. Honestly, that really doesn't mean anything to me (well, I think I grasp the concept, but what I *thought* was the shoe looks to be made onto the intake?)
go here. 4th picture down shows the difference between a tapered shoe and a backcut shoe. and yes, your shoe has a lot of taper.

http://home.pacbell.net/jmcclure/ShoePlate.html
 
#8 ·
definitely not a strong enough bolt.... TRG had some good insight for me, as i recently started paying attention to my loader... I pull it out the night before every river trip now. Now, Thanks to Todd, earlier in the day i'll go and buy four brand new grade 8 loader bolts, even if the old ones are still okay and not showing any rust... that way if you ever run short of time one day you have a stockpile of bolts ready to go in.
 
#10 ·
I checked those screws. They are 5/16" SS with nuts on the topside. Do I still need Gr 8 stuff? If so, I'll have to order it because the local hardware store doesn't have them.


Also, from the rear most part of the shoe to the front of the "horizontal" part of the loader is 12.1"

The "horizontal" part of the loader is 5/8" because the keel that's just on the other side of the intake.
 
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