Impeller Question
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Impeller Question

  1. #1
    Senior Member BigBoyToys's Avatar
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    Default Impeller Question

    Here's one for you Jet pros out there. I know the Impeller questions have been talked about to death here but I'm trying to get specific here.

    What Size and Type impeller do I want for a 20' Eliminator Daycruiser that will be running about 700- 800hp Twin Turbo BBC motor? I would like to be able to spin it at approx 6000+ RPM WOT but don't want to lose the low end holeshot capability by going with too small of an impeller, because it might make it difficult to pull skiers.
    In reading various articles, I'm thinking an A/B with an Inducer? Do I want an Aluminum, Bronze, SS, Hi Helix impeller? I read that because of the heavier weight of the boat I want a bigger impeller, but would sacrifice the RPM's. So I was thinking a little smaller impeller with an inducer might work (??) I want to keep it as inexpensive as possible but want something that will do the job reliably. Any opinions?
    "That whenever any Form of Government becomes destructive of these ends, it is the Right of the People to alter or to abolish it, and to institute new Government"
    Declaration of Independence, July 4, 1776

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  3. #2
    bfp
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    Top Fuel Jet bfp's Avatar
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    Myself, I'd go with a magbronze aggressor b with an inducer should get ya what you need

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    Senior Member hotbo's Avatar
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    Quote Originally Posted by bfp View Post
    Myself, I'd go with a magbronze aggressor b with an inducer should get ya what you need

    x2

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    x3 that should be pretty close

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    Senior Member ap67et10's Avatar
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    I personally would not even think about running B in something that heavy. I ran a AA american turbine aluminum in my 20' sanger mini cruiser with a 475hp bbc. i got about 4700 rpms out of it, but still did just over 60mph. however cruise at 30 was just under 3000 and skiing (which is what i use it the most for) was awesome! cruise around 2500 for wake boarders and 2700-3200 for most skiiers. great gas mileage and the hole shot was great for such a large boat...immediately on plane!

    with 7-800 hp i would guess you would be in the 5700-5800 rpm with the AA. I'd run stainless and cut it just a little if you think you can gain more because the engine makes that much more from 5600 compared to 6000.

    my new setup is a 9.5hh stainless with a procharged 502...looking to have some fun!!

    AP


    I personally would be pissed if i spent 1k on a new b ss impeller and it was a dog out of the hole. absolute worst case, you can cut it if its too big....if its too small....well that sucks
    Last edited by ap67et10; 04-06-2010 at 02:48 PM.

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    Super Moderator HammerDown's Avatar
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    I concur with the above...go bigger and cut it down if it doesn't give you a chubby.
    <img src=http://www.performanceboats.com/gallery/data/500/medium/06-30-11_1234.jpg border=0 alt= />

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    1977 Custom Sprint Jet wickedsanger's Avatar
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    Quote Originally Posted by HammerDown View Post
    I concur with the above...go bigger and cut it down if it doesn't give you a chubby.
    I agree! X 3
    Wickedsanger... Gettin it done with a Small Block!!!!

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    Senior Member TwinTurbo540's Avatar
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    I thought it was all for sale Jim.....?? Tony can set you up with everything you need!!

    Travis
    I like my women like I like my boats......Fast and ready to get wet at all times!!

  11. #9
    Boat Nut sleekcrafter's Avatar
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    Race prepped A, or A/B impeller with inducer, will get you in the upper 5K's and still have a decent cruise speed....
    Upper Midwest Power Boat Association
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  12. #10
    Senior Member 2002CP19's Avatar
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    Quote Originally Posted by TwinTurbo540 View Post
    I thought it was all for sale Jim.....?? Tony can set you up with everything you need!!

    Travis
    Nice!!

    LMFAO
    Quote Originally Posted by schick View Post
    Hold it firmly on the ground, a few pelvic thrusts should do the trick. If not repeat till satisfied!

  13. #11
    classic hot boater Orange Peel's Avatar
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    Default .

    I was told with a heavy boat and blower that I should go with the A..
    I run a Bronze A and am turning 58-59. My boat is not as big as yours tho?
    The B will give you high RPM but lose on the bottom? Its all in what you want?
    Bottom end(out of water)AA or A, big RPM and top end B.
    With that much power you should turn the A 6000 no problem.

    Good Luck.

  14. #12
    Senior Member BigBoyToys's Avatar
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    Quote Originally Posted by TwinTurbo540 View Post
    I thought it was all for sale Jim.....?? Tony can set you up with everything you need!!

    Travis
    LOL...Yep Travis, it is all for sale. For a price EVerything I own is for sale in fact.... I listed the sale price pretty high though so I wouldn't have to sell it. It is a wife thing...Wife ssays I have to sell some toys..... She never told me how much I have to ask for it though My plan is to go ahead and build it and run it. Now if someone wants to give me the kind of $$ I have it listed for, then I'll get me a Daytona.

    Yep, I am planning on getting with Tony to get everything and get the pump done. I've been just studying up on this stuff a bit trying to learn and was wondering what everyone thought the best impeller would be in the heavier boat with this horsepower. I don't know the first thing about building a pump and would much rather leave that up to the pros, and Tony will be getting this pump as soon as I get the funds back together.

    In the end, it looks like it's going to come down to $$ and the wife But I'm pretty sure I won't get $14k for this boat
    Last edited by BigBoyToys; 04-06-2010 at 09:00 PM.
    "That whenever any Form of Government becomes destructive of these ends, it is the Right of the People to alter or to abolish it, and to institute new Government"
    Declaration of Independence, July 4, 1776

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    Senior Member BigBoyToys's Avatar
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    So, with that in mind....

    All good post thus far. I'm learning here........
    "That whenever any Form of Government becomes destructive of these ends, it is the Right of the People to alter or to abolish it, and to institute new Government"
    Declaration of Independence, July 4, 1776

  16. #14
    Don't Member Blow It Up's Avatar
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    Call hi-tech performance Duane. He has helped me with all the questions one could ask. And have the parts ready to send. And usually one up it with the next step you forgot about.
    Last edited by Blow It Up; 04-06-2010 at 09:13 PM.

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