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Pump Blueprinting Instructions

This is a discussion on Pump Blueprinting Instructions within the Technical Articles / F.A.Q. forums, part of the Technical Support category; Here is a basic rundown of what you can easily do at home with a dremel, a small tip and ...

  1. #1
    Bryan Glynn is offline Banned
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    Here is a basic rundown of what you can easily do at home with a dremel, a small tip and some 100 grit sandpaper to better your performance and get a basic blueprinting job on your pump.

    Blueprinting is the process of making a part as perfect to it's engineering dimentions as possible, removing any manufacturing flaws or deviances such as casting marks, seams, misalignments, etc. Often when doing parts such as a pump, a bit of modification is also performed such as smoothing down rough edges or removing small amounts of material to better the water flow, even though they were actually designed that way.

    NOTE: removing material from your pump can result in a weaker structure and can make it more prone to stress fractures or failures.

    Here are pictures of what material you want to remove and smooth out. You want all these seams and surfaces to be smooth.





    You want the edges of the vanes, on both sides, to be smooth and rounded. Any knicks must be filed down, the edges should be straight across the vane with a tip like an airplane wing, nice and smooth. Your impeller, however (if stainless steel and not aluminum like older skis) needs a very sharp straight edge. File the edge sharp, but only angle the inside surace (the edge pushing the water). The outer surface should remain flat with the blade.



    [ May 07, 2003, 10:37 AM: Message edited by: Technical Support ]

  2. #2
    Bryan Glynn is offline Banned
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    Here's everything roughed out, I ran out of time at lunch so I'll finish after work.


  3. #3
    dav_dman is offline Time to open shop
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    Excellent pix~!! thx man!!!
    97 venture11/1200, 01gp12r stage1, 02F12X
    dav_dman@yahoo.com

  4. #4
    Bryan Glynn is offline Banned
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    ...and done! There, nice and butter smooth! [img]smile.gif[/img]


  5. #5
    DrVette is offline Braggin' about mods
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    Very good [img]smile.gif[/img]

    Might I add this;

    Blueprinting also includes making each opening EXACTLY like the others, careful measurement of width, height & depth make the flow more even.

    Also on the vanes I like to "feather" the trailing edges and make the Leading edges look like the front of a teardrop.

    The impeller is also prone to having the same needs however getting the exact cuts on each blade is more difficult than it seems and you may need to balance it after working on it.

  6. #6
    Bryan Glynn is offline Banned
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    Hey -

    I said 'basic blueprinting' [img]tongue.gif[/img]

  7. #7
    pro785lim is offline Braggin' about mods
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    NICE WORK [img]smile.gif[/img] I NEVER REALLY GAVE THAT MUCH THOUGHT, BUT I WILL NOW, EVERY LITTLE BIT HELPS :D

  8. #8
    fifthoffour's Avatar
    fifthoffour is offline New skier
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    Cool Re: Pump Blueprinting Instructions

    When I bought my ski I put an UL Trac Intake grate on my 95 SD SPI for better out the hole. It was great until I found a underwater tree stump! My pump's vanes were detailed and now there off the screw 1/4 to 3/16 back. Still fly's, able to pass car's running on highway next to Lake Norman. I WANT MORE!! Only 580 running 1 under X prop.

  9. #9
    Bill O'Neal2's Avatar
    Bill O'Neal2 is offline PWC Professional
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    Default Re: Pump Blueprinting Instructions

    Are any of you aware of a company called EXTRUDEHONE ?
    I'm sure they have a website.

    Extrude honing is a process where they take a metal or plastic part with passages in it, like a head or intake manifold ( or in my case, a jet pump), then they force a gel like material with abrasives in it through the ports or vanes under a few thousand pounds of pressure. It makes every surface smooth as glass and takes out any deformations, casting creases or lines. It is the most beautiful thing you ever saw.

    I thought, WOW! this is going to be the thing that makes my pumps better than anyone elses' pumps.

    I sent two pumps to Extrude Hone to have them blueprinted. Then, when I got them back, I radared one of my Limited racing 1996XP with the stock oem pump and a 16x23 Solas impellor. It ran out at 65.5 mph. give or take a few 10ths.

    I removed the oem pump at the beach and replaced it with the Extruded pump and the same impellor and nozzels. I got out the old Stalker radar gun and ran it again, over and over. It went 65.5 mph. Give or take a few 10ths.

    Well, at least I had the best looking pumps I ever saw !

    I do not spend my time or money blueprinting pumps anymore. I spend it getting the exact pitch and nozzel combo that makes the best speeds. By doing that, I got 67.5 mph out of that same 1996 XP limited racing boat.

    That was a $500.00 lesson learned. Blueprinting vanes in pumps is pretty much a waste of time. Sometimes moving an impellor closer or further away from the stator section makes a difference in the way the jet pump performs. But correct prop/nozzel combos in oem pumps, or aftermarket Skat pumps can make substantual differences.
    Bill O'Neal <br>
    WCM
    <a href="http://www.watercraftmagic.com"

  10. #10
    Technical Support's Avatar
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    Default Re: Pump Blueprinting Instructions

    Well, mine was a free experiment and didn't hurt anything. I never expected any top-end improvement, just a little hookup, if any. It's hard to measure that kind of improvement, but if you already have the pump off, and have a dremel...that's what this guide is for.:emoticont
    SBT Tech Support is here to help with your problems.
    We try to answer each question quickly and accurately.
    Please do not use Private Messaging for Tech Support, use the forums.

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