Your perfect jet pump.
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Your perfect jet pump.

  1. #1
    What the Hell is That? 72Hondo's Avatar
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    Default Your perfect jet pump.

    So pumps have been around for a while. Introduced into pleasure boats and race boats what the 60 & 70's? If you could design and build a pump would you do anything different? I'm not talking about mass producing a pump. A pump for your boat. Weather it be cast or billet is there anything to improve on? Or has everything been explored?

    From intake to the diverter. Has Dom At and Berk done everything they possibly could to R&D these pumps?

    Just curious.
    Quote Originally Posted by Kyle View Post
    Log off and go float, hang in the party coves, Show and shine on the trailer, fill up the boat, wax it, v-drive, jet, outdrive, and if you got a canoe and your reading this, you sir, need to phucking upgrade.

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    High Performance Marine ARS Marine's Avatar
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    lol, well I think there is plenty of exploration to be had with jet pumps, and we're learning new things every year that help in the efficiency of our old pumps. American Turbine is the only manufacture that I know of that is still exploring new ideas. They have n awesome Engineering and R&D Dept..
    That's one of the only reasons I've chosen to use there New SD-312 pump in my Chi-Town Tunnel. You should see the people @ the track look at me funny with this Big Monster pump hanging out the back of this race hull.

    just my thoughts / .050 cents I can buy a coffee.

  4. #3
    "BOATLESS" blender over's Avatar
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    Quote Originally Posted by ARS Marine View Post
    lol, well I think there is plenty of exploration to be had with jet pumps, and we're learning new things every year that help in the efficiency of our old pumps. American Turbine is the only manufacture that I know of that is still exploring new ideas. They have n awesome Engineering and R&D Dept..
    That's one of the only reasons I've chosen to use there New SD-312 pump in my Chi-Town Tunnel. You should see the people @ the track look at me funny with this Big Monster pump hanging out the back of this race hull.

    just my thoughts / .050 cents I can buy a coffee.
    How does a AT-309 compare to a 12JG, which is a overall better jet for a small boat?

    I like my AT but a hate the look of the huge transom adaptor plate..
    Last edited by blender over; 04-20-2011 at 08:16 AM.

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    Senior Member jetboatperformance's Avatar
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    With the exception of the newer Jets AT has produced over the past few years and some new "pieces" they have in the works Theres not much new basic jets but like ARS siad theres lots that can be done within what we have . The past several years have given us lots of improvements , Different , droops, nozzles. upgrade kits, modifications etc Our Personal Favorite is still a 12S suction, 17-4, Shaft, Bronze or Stainless Impeller Dominator Bowl and Place diverter



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    Here's a question; Are the "High-Flow" nozzles that AT sells more efficient than the Berkeley style? It would seem to offer smoother flow, but I've been bitten by "Common-sense" a number of times.....

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    Boss of the McIntyre Mob danhercules's Avatar
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    I wanna hear what of the 7.10-7.99 and UBF guys say about this topic!!! LOL

    I dont think we are gonna hear much from them. Looks like they got it down tho!!



    Its a loaded question. Is this for race or lake/river boat? To me no lake/river jet is worth a darn with out a diverter. The higher the better for cruising down the river at sunset!!!!


    Very first TPR 21' Deck. 528 BBF 736hp on pump gas built by High Flow Dynamics

    McIntyre Mob. Where the rejects play!

  9. #7
    Senior Member Cowboy_Mike's Avatar
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    Quote Originally Posted by cvxjet View Post
    Here's a question; Are the "High-Flow" nozzles that AT sells more efficient than the Berkeley style? It would seem to offer smoother flow, but I've been bitten by "Common-sense" a number of times.....

    What about the split bowls, are the new style A/T bowls better, and if so, it is noticable??

  10. #8
    What the Hell is That? 72Hondo's Avatar
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    Quote Originally Posted by danhercules View Post
    I wanna hear what of the 7.10-7.99 and UBF guys say about this topic!!! LOL

    I dont think we are gonna hear much from them. Looks like they got it down tho!!



    Its a loaded question. Is this for race or lake/river boat? To me no lake/river jet is worth a darn with out a diverter. The higher the better for cruising down the river at sunset!!!!
    I didnít expect the heavy hitters to say we're running such and such.

    Could it be designed differently? The intake and the pump itself? Why does it have to a 4 or 5 blade impeller? You really donít see "Concept" Jet pumps lol. Basically is the current design the best.


    Personally I think outside the box.

    Why not make the intake longer? Say towards the front basically a longer ramp. Drag could be a huge set back.....

    Why not have a holding tank above the pump and say at the push of a button dump the holding tank in the pump? You'd be pushing more water out than taking in. Kinda like nitrous for a pump. I could see the weight of the water in the holding tank being a problem.

    Why does the water have to flow Circular? Itís straight going in the intake and pretty straight coming out. Is there another way to compact the water?

    Those maybe the dumbest things your ever seen or read...... but again im outside the box.. Way way outside.

    Quote Originally Posted by Kyle View Post
    Log off and go float, hang in the party coves, Show and shine on the trailer, fill up the boat, wax it, v-drive, jet, outdrive, and if you got a canoe and your reading this, you sir, need to phucking upgrade.

  11. #9
    Senior Member YumaJet's Avatar
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    you answered question number one and its a lot of drag to carry.

    q. Why not have a holding tank above the pump and say at the push of a button dump the holding tank in the pump? You'd be pushing more water out than taking in. Kinda like nitrous for a pump. I could see the weight of the water in the holding tank being a problem.

    a. weight and 15 gallons of water wont do much b/c that would take just a sec to load up the pump with that little amount of water.

    q. Why does the water have to flow Circular? Itís straight going in the intake and pretty straight coming out. Is there another way to compact the water?


    a. the water cant be sucked through the intake and pushed out. thats the reason for the driveline to spin the impeller.

    definately outside of the box.
    boatless....

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    i think circular is considered most efficient because a round pipe flows the most for a given size.

    I have often considered the intake question. I wonder if an extended intake with a pump setback would improve performance by loading the pump better at high speed with less drag. A more gentle intake angle should improve intake flow. But at what cost as far as drag? Plus you get the advantage of the pump setback.


    there is this:

    IntelliJET Home

    Makes me wonder if a nozzle be built with spring loaded fingers to provide a variable opening.

  13. #11
    Senior Member YumaJet's Avatar
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    Quote Originally Posted by gatahiti View Post
    i think circular is considered most efficient because a round pipe flows the most for a given size.

    I have often considered the intake question. I wonder if an extended intake with a pump setback would improve performance by loading the pump better at high speed with less drag. A more gentle intake angle should improve intake flow. But at what cost as far as drag? Plus you get the advantage of the pump setback.


    there is this:

    IntelliJET Home

    Makes me wonder if a nozzle be built with spring loaded fingers to provide a variable opening.
    a jet pump is a jet pump, they just made it look alittle different and probably not practical for our type of jet boats.
    boatless....

  14. #12
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    I once reasoned that you could treat the jet like a turbine engine...they have "Turkey feathers" that contract to speed up the stream so the A/C can hit high speed, but open so it can get max umph when taling off or accelerating. I made a choke to see if I could hit cruise speed(30) at a lower rpm than normal- 3000....it didn't work....I believe that the jet is designed to flow a certain amount in, thru and out, and by choking it, I caused it to back-flow out the intake, offseting any gains.....I had been designing a two-flap nozzle that was spring loaded so at cruise pressure it would close down, but at full throttle pressure it would open up, allowing the engine to hit full rpm....I was going to be a MILLIONAIRE!!!

    I've been watching that Inteli-jet, but they keep changing it, first the nozzle, then a sliding shutter intake, and now even a varible pitch impellar....there's a reason a full on jet drive costs $3000, while an outdrive costs $8000....and a reason why my jet was 30 when I (un-necessarily) rebuilt it, while an outdrive MUST be rebuilt every 10 years and costs $2000 to do it....simplicity...That Inteli-jet is going to eliminate any of these features.

  15. #13
    Senior Member cyclone's Avatar
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    Quote Originally Posted by cvxjet View Post
    I once reasoned that you could treat the jet like a turbine engine...they have "Turkey feathers" that contract to speed up the stream so the A/C can hit high speed, but open so it can get max umph when taling off or accelerating. I made a choke to see if I could hit cruise speed(30) at a lower rpm than normal- 3000....it didn't work....I believe that the jet is designed to flow a certain amount in, thru and out, and by choking it, I caused it to back-flow out the intake, offseting any gains.....I had been designing a two-flap nozzle that was spring loaded so at cruise pressure it would close down, but at full throttle pressure it would open up, allowing the engine to hit full rpm....I was going to be a MILLIONAIRE!!!

    I've been watching that Inteli-jet, but they keep changing it, first the nozzle, then a sliding shutter intake, and now even a varible pitch impellar....there's a reason a full on jet drive costs $3000, while an outdrive costs $8000....and a reason why my jet was 30 when I (un-necessarily) rebuilt it, while an outdrive MUST be rebuilt every 10 years and costs $2000 to do it....simplicity...That Inteli-jet is going to eliminate any of these features.
    where can i see the "intellijet"?

  16. #14
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    One.......of........the.........previous.........p osters........posted.........the........weblink. Look for the blue "IntelliJet".

    On a lighter note, Cyclone, you once posted a picture of your boat passing under a bridge in the delta....heading in the general direction of Discobay....I've skied under that bridge maybe 1000 times in my life....I at the time thought all you cool guys lived in socal.....
    Last edited by cvxjet; 04-23-2011 at 08:17 AM.

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