Hp / Rpm
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Hp / Rpm

  1. #1
    Retired Air Force Master Sergeant's Avatar
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    Default Hp / Rpm

    I am taching out at 5400 RPM an estimated 600 hp with an A impeller. If I had 700 hp, how much more RPMs would it push it up to?

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    steelcomp was here
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    Quote Originally Posted by Master Sergeant View Post
    I am taching out at 5400 RPM an estimated 600 hp with an A impeller. If I had 700 hp, how much more RPMs would it push it up to?
    By the chart I have you're at about 580hp spinning an A @ 5400. 700hp would put you right at 5700, all else being equal.
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    Boat 502 76Miller's Avatar
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    Quote Originally Posted by steelcomp View Post
    By the chart I have you're at about 580hp spinning an A @ 5400. 700hp would put you right at 5700, all else being equal.
    Steel, what should 825hp spin a "A" to on your chart ? Thanks.

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    mo balls than $cents$ IMPATIENT 1's Avatar
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    Quote Originally Posted by 76Miller View Post
    Steel, what should 825hp spin a "A" to on your chart ? Thanks.
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    Super Moderator HammerDown's Avatar
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    I wanna spin my Aggressor full A =(double a-berk)[email protected] 6K
    Got that Scott?
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    Quote Originally Posted by 76Miller View Post
    Steel, what should 825hp spin a "A" to on your chart ? Thanks.
    Wayne ,

    Keep in mind the chart works spot on for some pumps but might be off by 10-15% on other pumps, ask BP. When I say spot on it depends on observed hp vs corrected.

    My old AT and Legend impeller's and pumps it was damn close with the corrected dyno #'s. With the MPD "B" cut ss Legend it's so far off it's funny.

    My MPD "B" is like a A+ on the chart for my observed dyno numbers at 6,100 - 6,200.

    Edit: It will graph out like this:


    Sleeper CP
    Last edited by Sleeper CP; 09-13-2008 at 09:01 PM.

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    Quote Originally Posted by HammerDown View Post
    I wanna spin my Aggressor full A =(double a-berk)[email protected] 6K
    Got that Scott?
    Your looking at an honest 800 hp at 6,000. I'd say corrected hp (90% chance) , but that depends on the blue print job on your pump.


    This is from another post from the Things that make power :

    What about observed vs corrected dyno number's. My scaner wouldnt scan worth a crap so here are a few of the corrected vs observed #'s:
    ..........Corrected #'s ..Observerd.......VE%........Airflow cfm
    ...5800....785............ 743 ...... 109 ............. 969
    ...6000....802... ....... 759 ...... 111% ........... 1018
    ...6200...828... ........ 783 ...... 113 ............. 1068
    ...6400...850........... 803 ...... 113% ..... .. 1093
    ...6600...856........... 808.......... 112............ 1134
    ...6800.... 850........... 801......... 110%........ 1146 cfm


    This 565" combination turned an AT 9.25" "A" 5,800. You can see from the chart that once you get up there in RPM you need another 50 Hp to just budge another 100 rpm or so.

    Sleeper CP
    Last edited by Sleeper CP; 09-13-2008 at 07:13 PM.

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  10. #8
    steelcomp was here
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    I apologise...I have to correct myself. I was looking at the AA scale on my first response. I'm using the same chart sleeper has, as I've found it to be most accurate for my combinations.
    These are all measured, or actual hp numbers, like what you'll need at the lake, on that day, in that heat, at that DA;
    Master Sargent, if you had 600hp you'd be spinning an A about 5700-5750
    700hp would be 6000-6050rpm.
    A @ 5400=495hp
    Hammer, I'm guessing your question was already answered, but a berk AA @ 6000 is asking for right at 800hp.

    76Miller, according to the chart, if you had 825 at the shaft, you'd spin a straight A to about 6300-6350.
    If God is your co-pilot, change seats!
    Acts 2:38, the perfect answer to the perfect question.

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