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 Post subject: DynoJet hits the lake!
PostPosted: Mon Sep 24, 2007 5:11 am 
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Joined: Mon Sep 12, 2005 5:57 am
Posts: 166
Location: Massachusetts
We put the dyno jet in the water this weekend and all went better than expected. I was very happy with how well the boat handled in the water and how the engine/pump set up worked. The little boat popped right up on plane, no porposing, no cavitation - the boat is a real hoot to drive!

Image

We did have a few problems - not to be unexpected for the first time out. The first was a weight distribution issue, the boat lists to the driver's side, hopefully when the real gas tank is installed it will balance out.

The trim setup is not strong enough and there is too much movement

There was more water in the hull than expected - After looking at things, one of the thru hull hose clams let go and I think the rest was overspray

The biggest problem we had was the camera - somone forgot to batteries in it..... We were smart enough to bring two cameras, so I should have some more pics to post.

_________________
Both the below websites detail my build progress.

http://dynojet.fateback.com/Index.htm
or
http://www.geocities.com/marksa1458/


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 Post subject:
PostPosted: Tue Sep 25, 2007 4:46 am 
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Joined: Mon Nov 17, 2003 3:01 pm
Posts: 2947
Location: Lander Wyoming
Wow, can't wait for the other pictures !!

I am worried about the same thing : boat listing to the drivers side. That is why I am considering center seating for the driver, and there is another design here that shows it built that way...not the dyno but I cannot remember which it was....maybe I can order those plans and put a jet in it !

Steve


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 Post subject:
PostPosted: Tue Sep 25, 2007 6:59 am 
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Joined: Thu Aug 24, 2006 6:55 pm
Posts: 388
Location: K.C. MO.
Andy you used the pump and hull out of the x2 correct.
The stock setup has a lever that locks into different positions.

The stock cabel is to short. Where you spliced it could be a problem if it is not really stiff. I would use a longer cable. The sterring cable off a JS550 is plenty long, about 9 1/2' long to be exact.

I have an x2 hull in my driveway I was going to cut up and take out the 550 part out of my TNT and graft in the x2 part to get the bigger 650 pump in their. I hope this will give more top end and power. Although my boat will pull me up on a wake board now.

My boat leans to one side with one passenger ,but that's the nature of these small boats.

_________________
THE FRAUD WILL NOT GO AWAY..9-11 WAS AN INSIDE JOB...
http://www.youtube.com/watch?v=hZEvA8BCoBw

http://s147.photobucket.com/albums/r302 ... rd_photos/


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 Post subject:
PostPosted: Tue Sep 25, 2007 7:19 am 
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Joined: Mon Sep 12, 2005 5:57 am
Posts: 166
Location: Massachusetts
Yes - I used an X2 with a TS driveshaft - I connected the stock trim to a bell crank and then used a Morse Cable to connect to the control on the dash.

I am thinking about putting in a DC motor and using a switch. I could then use the cable to connect a reverse bucket!

All in all it was a good outing.

_________________
Both the below websites detail my build progress.

http://dynojet.fateback.com/Index.htm
or
http://www.geocities.com/marksa1458/


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 Post subject:
PostPosted: Tue Sep 25, 2007 10:35 am 
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Joined: Thu Aug 24, 2006 6:55 pm
Posts: 388
Location: K.C. MO.
Andy so you couldn't tell if the trim had any effect at all? Full up or full down or it is being moved by the water pressure?

_________________
THE FRAUD WILL NOT GO AWAY..9-11 WAS AN INSIDE JOB...
http://www.youtube.com/watch?v=hZEvA8BCoBw

http://s147.photobucket.com/albums/r302 ... rd_photos/


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 Post subject:
PostPosted: Tue Sep 25, 2007 5:44 pm 
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Joined: Mon Sep 12, 2005 5:57 am
Posts: 166
Location: Massachusetts
At slow speeds the trim seemed to work, but as 3/4 speed (wasn't brave enough to run at full speed yet) it didn't make a difference at all.

_________________
Both the below websites detail my build progress.

http://dynojet.fateback.com/Index.htm
or
http://www.geocities.com/marksa1458/


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 Post subject:
PostPosted: Wed Sep 26, 2007 10:52 pm 
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Joined: Mon Jan 26, 2004 1:48 pm
Posts: 77
Location: Tasmania, Australia
Congrats on getting the Dyno-Jet to the water. You must be very pleased with actually getting into the water. You have the only other floating Dyno-Jet that I know of.

Mine also lists to one side with just one person in it but then you must remember that it is a small boat. You just need to take out a friend.

The only handling problem that I have is some slight porposing at wide open throttle. This happens at about 35MPH and is not a problem as I don't hold it wide open for too long.

I look forward to some more photos.

Gordon


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 Post subject:
PostPosted: Thu Sep 27, 2007 5:07 am 
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Joined: Mon Sep 12, 2005 5:57 am
Posts: 166
Location: Massachusetts
Thanks Gordon - I can't thank you enough for the photos and your website - I must have referenced your notes and pictures a hundred times.

I finally got some more pictures:


Image

Image

Image

Image

Image

Image

Image

Image

The last pictures shows that I still have some work left to do! :D

_________________
Both the below websites detail my build progress.

http://dynojet.fateback.com/Index.htm
or
http://www.geocities.com/marksa1458/


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 Post subject:
PostPosted: Thu Sep 27, 2007 7:28 pm 
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Joined: Thu Aug 24, 2006 6:55 pm
Posts: 388
Location: K.C. MO.
Andy: Tis plane to see why you weren't turning sharpe turns,... now ....their's no lid on it, ha,ha.
You have any type of fin some of these guys are talking about?

I don't and it is fun at 28mph( my curent max) turning full right or left and throwing the boat into a 180 slide.
Or just get it going into a turn and feel it trying to wash-out (if in a car drift) through a turn.

I found by adding one of those aftermarket ride plates that has some small fin to it does give it some bite in the turns.

It would be interesting to see what the flat bott. squirt looks like in a full sharp turn, if it get's high up on the side.

The pics. of Gordons boat in a turn get's up on the side like mine.

I like how they respond you can get the boat up on the side so steep in a turn and their is still water geting to the pump , it is ausome.

Looking good but the cold weather is coming fast for many more trips to the lake. Once you get it on the water ah you can't wait for more test runs, it kinda gets in you're blood. Ha....Ha.... Ha.... Need another Fix yet?

_________________
THE FRAUD WILL NOT GO AWAY..9-11 WAS AN INSIDE JOB...
http://www.youtube.com/watch?v=hZEvA8BCoBw

http://s147.photobucket.com/albums/r302 ... rd_photos/


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 Post subject:
PostPosted: Thu Sep 27, 2007 8:50 pm 
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Joined: Mon Jan 26, 2004 1:48 pm
Posts: 77
Location: Tasmania, Australia
Photos look great! Have you done a spin turn yet? The first time I did I nearly had to change my pants. After I learnt not to do it at full throttle I was OK.

When turning mine rolls onto the side until the chine flat is full engaged and then the boat starts to turn properly. The pump is never starved of water due to the deep V type of hull.

I too have some water that gets into the boat. When I do a spin turn at speed the back of the boat (which is going frontwards as the end of the spin) goes underwater for a moment. I have actually had the water come right up to the back of the seat and run down my back. Some of this leaks into the engine bay but it is never a problem.

Your Dyno-Jet will look good once you have the deck on - more photos please.

Gordon


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