impeller question 9.5
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impeller question 9.5

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    Default impeller question 9.5

    would a 9.5 "a" impeller act like an 9.0 "AA"....im tryin to make sense of why im only seein 5100-5200 rpms with my 532/apprx 600hp at 6000

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    mo balls than $cents$ IMPATIENT 1's Avatar
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    lol 9.5 behind 600hp is yo reason nuff

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    Quote Originally Posted by mikewtx19 View Post
    would a 9.5 "a" impeller act like an 9.0 "AA"....im tryin to make sense of why im only seein 5100-5200 rpms with my 532/apprx 600hp at 6000
    a 9.5 "A" is a big impeller. 5100 - 5200 is not bad.
    Boat 405.

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    Senior Member ap67et10's Avatar
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    Quote Originally Posted by mikewtx19 View Post
    would a 9.5 "a" impeller act like an 9.0 "AA"....im tryin to make sense of why im only seein 5100-5200 rpms with my 532/apprx 600hp at 6000

    id say before you start cutting anything, you need to hit the button to see what kind of rpm you are getting on the juice. the bigger impeller like you have will really give you that nice holeshot like you say you have. If the juice gets you up into your power area, then you probably have the best setup the way it is. (impeller wise)

    AP

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    Senior Member Widetrack's Avatar
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    X2! I had the same issue with a Hi Helix A and 725 HP 4800 RPM that was it! If I would of had a large shot no telling the RPM it would have turned! You have more than 600 HP! Hit that button and the RPM will rise and it will run like a spotted azzed ape! And it won't over rev! WT


    A mild built 532 X 1.25 =665 HP that is mild!!! A little more a 532 X 1.4 =745 HP A 600 HP 532 is a super mild build! IMO!
    1.25 and 1.4 is HP per cubic inch!
    Last edited by Widetrack; 07-21-2010 at 02:46 PM.


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    Senior Member ap67et10's Avatar
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    one other thing to consider (if your setup allows) is to gradually step up....if you can start at a 75 shot or something like that...then move up as you get comfortable, you can see how the boat reacts and what kind of rpms you are turning...and add more juice as needed.

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    mo balls than $cents$ IMPATIENT 1's Avatar
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    800rpms to get the cam on peak with nitrous is gonna take at least a 200hp shot to get there i'd have a 1/2 size cut off that impellor up frt and detailed if it were mine, get the rpms closer to cam peak and small shot of nitrous to climb above peak

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    Senior Member OkieDave's Avatar
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    Default 9.5" rocks!

    I run a 9.5" and I love it. 5500rpm on the motor = 108 mph
    I have not stayed on the NOS long enough to get a mph but its pretty fun! everybody says cut the impellor but why? my peak torque is at 5100.

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    mo balls than $cents$ IMPATIENT 1's Avatar
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    lol, not everyone runnin a 557bbf tq monster either dave

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    Quote Originally Posted by OkieDave View Post
    I run a 9.5" and I love it. 5500rpm on the motor = 108 mph
    I have not stayed on the NOS long enough to get a mph but its pretty fun! everybody says cut the impellor but why? my peak torque is at 5100.


    What is it ?

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    mo balls than $cents$ IMPATIENT 1's Avatar
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    Quote Originally Posted by Sleeper CP View Post


    What is it ?

    S CP
    last i herd it was a compression 557bbf

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    Quote Originally Posted by mikewtx19 View Post
    would a 9.5 "a" impeller act like an 9.0 "AA"....im tryin to make sense of why im only seein 5100-5200 rpms with my 532/apprx 600hp at 6000
    The 9.5 " A" will act more like an "AAA" than an "AA" The old AT 9.25" "AA" acted like a "AAA". My notes from American Turbine from the mid '90's states 50 hp per 150 rpm:

    5,100 = 600 hp
    5,400 = 700 hp
    5,700 = 800 hp

    from the other posts I read, you have a Nos system? How big of a shot is it?

    Look at this chart and drawl another line for a "AAA" it should be close to the hp curve you're looking at:


    Edit:

    I'm going to suggest that if you run Nos you can do an over-lay graph like this assuming you've dyno'ed the engine to determine the rpm on the Nos. Here's how I've been doing it since '93 -'95 it's always worked for me.


    S CP
    Last edited by Sleeper CP; 07-22-2010 at 09:09 AM.

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    mo balls than $cents$ IMPATIENT 1's Avatar
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    got any idea what hp it takes to turn a basic amt ss aa-cut to 7800-8200?

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    Quote Originally Posted by IMPATIENT 1 View Post
    got any idea what hp it takes to turn a basic amt ss aa-cut to 7800-8200?
    I haven't a clue.

    S CP

    "Dark Sarcasm"
    Going fast is only half the fun ... what you make go
    fast is the other half.
    " A Government big enough to give you everything you want is big enough to take away everything you have"

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