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impeller questions

  1. #1
    Boss of the McIntyre Mob danhercules's Avatar
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    Default impeller questions

    Ok, most know my set up, if not....

    21' TPR deck. Very heavy boat. 736 hp. Running an alum "A" I spin the "A" to 6k. My peak hp is 6200. It dose not fall off much before 6k. Still in the 700hp range.

    My boat dont have much of a hole shot at all. I can get my wife up on the wakeboard no problem when there are two people in the boat.

    This weekend I had 5 people in the boat and still got my my wife up, but when a guy tried, the boats could not get him up. At about 4200 my pump unloads hard.

    My shaft is cut for an inducer. I got one on order. How much is this gonna help?

    Was also thinking aobut thowing a "AA" in there. What dose that do to top end speed and RPM? How bout bottom end? A "AA" will lower my cruising RPM, right?


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

    McIntyre Mob. Where the rejects play!

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    Senior Member Hustler's Avatar
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    AA will help the hole shot alot along with the inducer and will also lower your cruising RPM and it will affect the top MPH. Lets be honest here Dan your not racing the boat so why be concerned with a couple MPH and be alot happier with with the drivability of AA.

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    Boss of the McIntyre Mob danhercules's Avatar
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    Your 100% right Joe, I have not even gotten an MPH on the top end yet. The reason I asked that part was more for education.

    I know they will both help, but how much?


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

    McIntyre Mob. Where the rejects play!

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    It's hard for me to say because when I did my pump I did every thing at once and it was night and day. If your pulling skiers and tubers around I would think the AA will be alot of help.

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    Senior Member Pattymelt18's Avatar
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    What kind of hardware is in the boat rideplate angle, shoe, and loader my dad has the same boat and been getting that thing to work has been a pain so far but its coming along we picked up 800 rpm and almost 10 mph on hardware and not even that close yet but getting better.The AA impeller is a must im pretty sure they have triple and quad A impellers also.
    Last edited by Pattymelt18; 07-08-2008 at 04:27 PM.

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    Quote Originally Posted by Pattymelt18 View Post
    What kind of hardware is in the boat rideplate angle, shoe, and loader my dad has the same boat and been getting that thing to work has been a pain so far but its coming along we picked up 800 rpm and almost 10 mph on hardware and not even that close yet but getting better.The AA impeller is a must im pretty sure they have triple and quad A impellers also.

    I'm pretty sure Morgan is running a quad in his deck but he's got 1600 ponnies to push it

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    Dan,
    I have a 21ft Carrera bow rider with a little over 500hp. I changed the "A" Dominator impeller to a "AA" Dominator. I can now put the boat on plane with very little bow rise. Mid range seems push you in the seat a little. The motor turned the "A" about 5200 and the "AA" 5050.
    It appears to get a couple of more mph out of cruising rpm.

    The boat ran on the speedo about 61-62 with the "A" and about the same with the "AA". I put a loader grate in it and gained a couple of mph.
    In my heavy daycruiser I didn't lose any significant top end but gained a lot acceleration. For a heavier boat it appears to make sense.

    I watched you launch out of Jack Smith around the end of the season last year. Your boat sounded great. The idle I remember was real high and had a lot of lope. If you do go to a "AA" you might want to try a little lower the idle as my boat picked up speed at idle and became a little more sensitive to put on the trailer. Talk to Tom at Jet boat performance he walked me thru the changing, and was extremely helpful.

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    Boss of the McIntyre Mob danhercules's Avatar
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    I have not looked at my hardware yet. I got the new moter in and enjoying it. Now I am gonna start playing with it. Bob Fry (the champ) took a quick look under the boat. I am not sure where any thing is set or what is in there. I dont know loaders or shoes.

    I think I am gonna install the inducer at the river and take it up to Aha. I am hoping that Greg will take a look at the hardware and give me some tips.


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

    McIntyre Mob. Where the rejects play!

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    Boss of the McIntyre Mob danhercules's Avatar
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    Quote Originally Posted by Cruiser 509 View Post
    Dan,
    The motor turned the "A" about 5200 and the "AA" 5050..
    So it looks like I will loose a 200 RPM. I gotta look at my dyno sheet again.

    Quote Originally Posted by Cruiser 509 View Post
    I watched you launch out of Jack Smith around the end of the season last year. Your boat sounded great. The idle I remember was real high and had a lot of lope.
    So you saw me and never flagged me down to have a beer? HOW RUDE!! Next time flag me down, we need to have 2.

    Thanks for the complements on how the boat sounds.
    Last edited by danhercules; 07-09-2008 at 01:12 AM. Reason: cause I am a fag.


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

    McIntyre Mob. Where the rejects play!

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    Razor Wire Militia 髯岙喢殮作's Avatar
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    Quote Originally Posted by danhercules View Post
    So it looks like I will loose a 200 RPM. I gotta look at my dyno sheet again.



    So you saw me and never flagged me down to have a beer? HOW RUDE!! Next time fag me down, we need to have 2.

    Thanks for the complements on how the boat sounds.
    what a fag

  13. #11
    Senior Member Futs's Avatar
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    Quote Originally Posted by danhercules View Post
    So you saw me and never flagged me down to have a beer? HOW RUDE!! Next time fag me down, we need to have 2.
    Nice Dan,I knew it was true.....

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    TRG
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    Dan, i saw you out in front of our sandbar on saturday or friday forget wich one it was,, but i was dealing with a kid and the fact i did not have a beer, so i left you alone, but i saw "Carrot top" out there wakeboarding, i did not know he was with you guys!
    Nice addition with the flags!
    Todd

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    Resident Ford Nut Sleeper CP's Avatar
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    Quote Originally Posted by danhercules View Post
    I have not looked at my hardware yet. .
    Start here for sure. It's alot cheaper than a AA impeller.

    Dan in the CP an intake with an additional 1.5" blocker will make the pump cavitate pulling up a 160 lb. skier. Check your hardware first. Were you soft peddling it to get the skier up or mashing it ?

    Sleeper CP

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  16. #14
    Boss of the McIntyre Mob danhercules's Avatar
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    Quote Originally Posted by 髯岙喢殮作 View Post
    what a fag
    Thanks A$$ hole, I mean smart a$$


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

    McIntyre Mob. Where the rejects play!

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