How much hp?
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How much hp?

  1. #1
    '77 Hondo GT rampage's Avatar
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    Default How much hp?

    How much hp est would it take to pull 6200 rpm out of a AA at 5000'? About how fast would that be est of course. 496bbc, 9.1cp, 671 blower 5lbs, 260-266 dur .50, 714-714 lift, 360cc ported heads, to 650's that flow 730cfm. 86 eliminator jet v hull also had pump work. Thanks..

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    The Man cordog009's Avatar
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    I'm gonna start the bidding at 875.


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    Senior Member H20MOFO's Avatar
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    That should put you at or close to triple digits, I would think. You might do a thread search for impeller charts. At 5000' ,I assume you are talking about the altitude where you run?
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  6. #4
    '77 Hondo GT rampage's Avatar
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    Yes, though it's not my motor, just sizing up this years competion.

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    Senior Member Red Rocket's Avatar
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    I would guess about 1200 plus to do it at 5000'. I have a 1050 HP turbo motor that spins a Stainless AA 6200 at 2500'.

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    Senior Member moneysucker's Avatar
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    Give this thread some time. SleeperCP will have charts and graphs posted in no time.
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    Resident Ford Nut Sleeper CP's Avatar
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    Quote Originally Posted by moneysucker View Post
    Give this thread some time. SleeperCP will have charts and graphs posted in no time.
    I don't know jack about altitude..., but I'm sure someone can tell you an altitude correction factor.


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  10. #8
    Senior Member Boat 405's Avatar
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    Quote Originally Posted by rampage View Post
    How much hp est would it take to pull 6200 rpm out of a AA at 5000'? About how fast would that be est of course. 496bbc, 9.1cp, 671 blower 5lbs, 260-266 dur .50, 714-714 lift, 360cc ported heads, to 650's that flow 730cfm. 86 eliminator jet v hull also had pump work. Thanks..
    No offense but that motor combo probably won't get it done. Like Miller said probably around 1200hp at sea level.

  11. #9
    Senior Member Sanger Pete's Avatar
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    I have heard that a normally aspirated motor will lose 3% of its HP for every 1000' of elevation. I usually run at about 5500' elevation, and lose about 15% of my rpms running at about sea level. I guess that the other way of looking at it is that I gain almost 18% by coming down to a sea level lake--makes my cruiser feel like a race boat.

  12. #10
    E-7 Sheepdog (ret) SmokinLowriderSS's Avatar
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    Acording to the impeller charts, 900HP or a bit more is it.

    Now, detail the imepller and the number climbed just a bit higher since that usually costs some RPM.

    The pump doesn't give a darn about altitude, so that HP it takes to spin it X-RPM @ sea level is the same # it takes at 5 (or even 10) thou. feet.
    The motor making it cares, not the jet pump.

    What it'll have to make @ sea level to hold the 1,000 or so HP at 5,000, is the guesser.

    Since turbo motors are good about altitude compensation, what about blower engines?

    As noted, I don't think that's enough motor to do it.
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  13. #11
    Glendale Arizona Squirtcha?'s Avatar
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    Quote Originally Posted by Sanger Pete View Post
    I have heard that a normally aspirated motor will lose 3% of its HP for every 1000' of elevation. I usually run at about 5500' elevation, and lose about 15% of my rpms.
    I'd have to move.

  14. #12
    Boat 502 76Miller's Avatar
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    Quote Originally Posted by Squirtcha? View Post
    I'd have to move.
    For what its going to cost to build this motor, it might be cheaper to move !

  15. #13
    '77 Hondo GT rampage's Avatar
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    Quote Originally Posted by 76Miller View Post
    For what its going to cost to build this motor, it might be cheaper to move !
    For sure!! Thats Why I own a flat; no disrespect towards jets.
    Says he's pullin 6200 rpm with an AA with only 700-800hp pushing 95+

  16. #14
    no need 2 fake it. 84Condor's Avatar
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    Quote Originally Posted by Squirtcha? View Post
    I'd have to move.


    hahaha! thats right, F that place!!!!
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