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bwurst1

  • Karma: +0/-0
droop vrs straight snoot
« on: September 03, 2009, 07:30:58 AM »
I have a straight snoot on my 18" syndicate from HTP. I was wondering if this is the best one for my boat. I dont see many others using this type. I was told that because my boat is pretty light and short (17'9") that I dont need the lift from a droop. Is this true? I was also told that by not bending the water through a droop that Ill get more thrust from a straight snoot. I cant help but think that using a straight snoot the jet stream isnt all the way in the water opposed to where it would be with a droop. Has anyone experimented with both types of snoots?
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2savage4you

  • Karma: +14/-1
Re: droop vrs straight snoot
« Reply #1 on: September 03, 2009, 07:55:45 AM »
I have just the opposite, Droop and i want to go to a snoot but testing is involved first because these are tuning tools.. hell i might find im better with a snoot or i might find out im better with a droop or i might find out im better without either of em :sly:


Start testing to find out, maybe you can borrow a droop from a friend.

Read throught this thread :thumbup:
http://www.performanceboats.com/html/forums/showthread.php?t=39218&highlight=Nozzle+Water
« Last Edit: September 03, 2009, 09:10:09 AM by 2savage4you »
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sturat 514

  • Karma: +0/-0
Re: droop vrs straight snoot
« Reply #2 on: September 03, 2009, 09:47:40 AM »
There really is no right or wrong answer for this question. Every boat is its own beast and what is good for one may not be good for another. Like 2sav said borrow one from a buddy and try it out. That is the ony way you will know for sure.
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Legalize the Constitution

Oldsquirt

  • Karma: +1/-0
Re: droop vrs straight snoot
« Reply #3 on: September 03, 2009, 10:08:28 AM »
I cant help but think that using a straight snoot the jet stream isnt all the way in the water opposed to where it would be with a droop.

Has nothing to do with it. At higher speeds, the nozzles are completely out of the water.

As has been suggested, borrow a droop and do some testing.
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bwurst1

  • Karma: +0/-0
Re: droop vrs straight snoot
« Reply #4 on: September 03, 2009, 04:12:55 PM »
[quote
Has nothing to do with it. At higher speeds, the nozzles are completely out of the water.

Even with a droop there completely out of the water?

2s4y
Thanks for the link good reading.

Seams to me (from what I read) droops are only good for bow lift. Wouldn't you get the same effect with a diverter?
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GT Jets

  • Karma: +192/-0
Re: droop vrs straight snoot
« Reply #5 on: September 03, 2009, 06:11:28 PM »
[quote
Has nothing to do with it. At higher speeds, the nozzles are completely out of the water.

Even with a droop there completely out of the water?

2s4y
Thanks for the link good reading.

Seams to me (from what I read) droops are only good for bow lift. Wouldn't you get the same effect with a diverter?

The best way to get true bow lift is with a Droop Snoot, the "second best" way is with a Diverter or other trim device...

Once the water leaves the nozzle, all work is done, so it really does not make major differences if the nozzl is "in the water" or not, but more where the thrust pressure is being applied to the hull.

Before I start a huge pissing match over the diverter deal, let me qualify that. The diverter does not change the thrust level, but changes the thrust angle...totally different animal.

What we have learned from playing with literally any and all add ons to a Berkeley 12JG on a 19' aluminum vee hull is this...

A droop adds bow lift in all areas of speed including out of the hole and WOT. When a Diverter is added to the same Droop, a large level of "adjustability" is added making the boat easier to drive and "tune". When wedges are added for up or down angle, you can actually trim out to a nuetral point, makeing adjustments more finite...

The opposite of the droop is a standard nozzle, with or without an extension, this "raises" the thrust height and keeps the bow planted pretty well (depending on the hull of course) and also makes the boat turn better as a rule. With the addition of a Diverter (or other trim device) will give a "false" bow lift by putting downward pressure on the transome (makes it act ass heavy)... IMHO this eats up valuable forward thrust and HP and can lead to ill handling.

Keep in mind I have never seen two boats work with the same set up.

This thread could literally go on for an eternity and there will be literally thousands of different opinions, I am just giving you what I have learned by working closely with a boat builder and writing down everything we saw..(disclaimer-18 years ago) :thumbup:

GT

  • Boat #1: 1992 Carrera 20.5 Elite (I/O bitches)
  • Boat #2: 19' Bubble deck Jet BBC Berkeley
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If i get some free time tonight at work, ill play with it and post it for everyone to see.

Time to man up and yank it John!  :banghead:
Ray

SLCKREG

  • Karma: +0/-0
Re: droop vrs straight snoot
« Reply #6 on: September 03, 2009, 07:13:36 PM »
It's worth a try, that's why they were invented. It might work well for ya or???  An added bonus due to the pin angle, your rooster will be on viagra O0
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propless

  • Karma: +12/-0
Re: droop vrs straight snoot
« Reply #7 on: September 03, 2009, 07:16:34 PM »
 bwurst1,  Is your Syndicate a tunnel hull ?  If so you might want to get a hold of watergun4u over on Performance Boats.  He has been trying different setups on his Syndicate and might be able to give some helpful advice too.  Hes usually in the Mendota slough thread  ::).   http://www.performanceboats.com/html/forums/showthread.php?t=44357
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Welcome to the club of broken boats :o  Pay here$ bend over and move along.

repoman

  • Karma: +0/-0
Re: droop vrs straight snoot
« Reply #8 on: September 04, 2009, 05:05:39 AM »
im going with GT's post...no more guess work...lol...GREAT INFO GT.

i wanted high speed and a big roost with my last boat.  neutral on my diverter and i was doing the speed....up and i got the roost.  it literally took 3 trips of testing with wedges and different settings with the diverter to get a "compromise"  IMHO you can set your boat up for one style of driving or the other...not both.


i personally had a wedge, droop, and diverter on a 19ft tahiti.  there was more to test with but i was too tired and broke to do it.
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"i don't think its supposed to do that"

bwurst1

  • Karma: +0/-0
Re: droop vrs straight snoot
« Reply #9 on: September 04, 2009, 06:05:26 AM »
Propless,
No its not a tunnel, unfortunately :( . I am however looking for a project tunnel.   
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bwurst1

  • Karma: +0/-0
Re: droop vrs straight snoot
« Reply #10 on: September 04, 2009, 06:34:03 AM »
im going with GT's post...no more guess work...lol...GREAT INFO GT.

i wanted high speed and a big roost with my last boat.  neutral on my diverter and i was doing the speed....up and i got the roost.  it literally took 3 trips of testing with wedges and different settings with the diverter to get a "compromise"  IMHO you can set your boat up for one style of driving or the other...not both.


i personally had a wedge, droop, and diverter on a 19ft tahiti.  there was more to test with but i was too tired and broke to do it.

Thanks for the imput! I am trying to set up the boat for top speed
Right now Im running 2 wedges, a 9" straight snoot, hyd diverter, 3 deg on the ride plate, and my pump pushed out the back. Im not too  concerned with the roost. I was wondering what (if any) the difference was between a straight snoot and a droop besides lift, If anyone has tried both, and what the outcome was. 
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repoman

  • Karma: +0/-0
Re: droop vrs straight snoot
« Reply #11 on: September 04, 2009, 01:30:42 PM »
just as i and gt said, it really depends on your boat.  the setup you have sounds good, but there is allot going on back there...sometimes less is more.  i would go to the lake with some tools and just stat taking things off or changing stuff.  as for the droop question, its all a matter of putting the jetstream where the boat wants it.  read how the boat is running.  what size boat do you have...
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"i don't think its supposed to do that"

bwurst1

  • Karma: +0/-0
Re: droop vrs straight snoot
« Reply #12 on: September 04, 2009, 02:08:00 PM »
First of all let me say thank you to everyone for all the help on this one. Sounds like I'm going to have to bite the bullet and buy a droop, dont know what it will do but what Ive got from this is "dont know unless you try". 

Repoman,
To answer your question the boat is 18' ( 17'9")
Thanks again for the input. :thumbup:
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SLCKREG

  • Karma: +0/-0
Re: droop vrs straight snoot
« Reply #13 on: September 04, 2009, 03:49:39 PM »
It's a trial and error deal for sure. Gt or someone once put up a little sketch on here that kinda showed how a droop should work in theory. By lowering the thrust line, it allows you to run more pin angle and ....oh man I'm over my head here. lol  In theory it will lift the entire boat....as opposed to a straight snoot.
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splatter

  • Karma: +0/-0
Re: droop vrs straight snoot
« Reply #14 on: October 04, 2009, 06:01:57 AM »
I'm new on the site, but I figured I would throw in my practical 2 cents.  I have been a jet boat guy for almost 40 years from BFJ's in the 70's and 80's to building my own tunnel.  And just about the time I think I have these buggers figured out I find out I don't.  The only thing I figured out is to test, test, test.

I have a 21' Carrera with a set back pump, loader, shoe, ride plate, droop, and PD.  It runs just under 60mph with just me in the boat and rides awsome over 40, but porpoises under 40 even with the PD.  Thats fine at the river, you just go faster than 40.  However, the lake I live at now gets very choppy in the main channel on weekends so I spend a fair abount of time cruising at 30.  So I figured I would bite the bullet and give up some top speed to fix the porpoise and put on a straight snoot.  So go figure, it took care of the low speed porpoise and topped out at 62 with me and my wife in the boat! :screwy:

So all I can say is test, test, test.

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crewchief22

  • Karma: +66/-0
Re: droop vrs straight snoot
« Reply #15 on: October 04, 2009, 09:02:51 AM »
Good info  ;D

Welcome to SCJB
  • Boat #1: '77 Hondo Pantera GT Jet
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"Racing is life!  Anything that happens before or after, is just waiting"    Steve McQueen

The problem with America is stupidity. I'm not saying there should be a capital punishment for stupidity, but why don't we just take the safety labels off of everything and let the problem solve itself?

jet boat performance

  • Karma: +25/-0
Re: droop vrs straight snoot
« Reply #16 on: October 04, 2009, 09:27:29 AM »
Splatter , welcome to the boards  Tom

ps , just as youve learned over the years with trials and tribulations " its all about experiment , test tune and retest , my Son said sometime back "how will you ever know if your set up is optimum if you dont experiment with new and different things? "
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