Vortecpro 467
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Vortecpro 467

  1. #1
    steelcomp was here
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    Default Vortecpro 467

    Posting this for Mark.


    467 pump gas/peanut port heads



    Observed power:



    Corrected power:



    Set up info:




    Dyno Correction factor calculator:

    http://wahiduddin.net/calc/calc_cf.htm

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    Thanks Scott. 467 CU big block, 9.0 compression, [email protected] hyd flattappet cam, GM LS6 stamped H rocker arms, .080 wall 3/8 moly pushrods, Ported GM 236 peanut port heads, performer RPM intake, factory passenger car oil pan, 30 w oil, tested with a four hole 1 inch spacer and a 850 holley, 2 inch headers with 3 inch mufflers. Tested with 91 octane pump gas. If IG could come up with the density altitude for the test it would be appreciated.
    Last edited by Vortecpro; 07-18-2010 at 07:43 PM.

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    Sitting here listening to Bill Cunningham and decided to check in here....

    Now that is what I call a great dyno day with a Density Altitude of almost 9300'. Hope somebody asks where those numbers come from.

    To put that in perspective with folks that live at sea level, the drag races at Sonoma today saw about 2100+ ft (in the pro stock pits at least) and that place is only about 90 ft above sea-level.

    Funny how we all compare flow bench numbers all over the world and when you start comparing dyno numbers people have a hissy-fit

    Back to the radio.

    Regards,
    IG

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    Oh shoot I forgot to add that is a Relative Air Density of 74.87% for those that would rather speak that language.

    Regards,
    IG

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    Thanks for that information, I knew it was over 9000 feet.

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    Quote Originally Posted by Inquisitive Gearhead View Post
    Oh shoot I forgot to add that is a Relative Air Density of 74.87% for those that would rather speak that language.

    Regards,
    IG
    Can you explain how that plays into the equation? We all speak english. (well, I hope we do )

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    Some folks use Relative Air Density gauges for reference for tuning.

    Others use Air Density and others use Density Altitude.

    Air Density is typically expressed in lbs/cubic foot and Density Altitude is typically expressed in Feet.

    As an example, a cubic foot of air at sea level would typically weigh .075 lbs or so per cubic foot. Up here where I live it is not so heavy. One column in VortecPro's dyno data shows it was .057 lbs/cubic foot.

    Regards,
    IG

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    steelcomp was here
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    517hp is pretty impressive for a peanut port, 9:1 flat tappet 467, and it was still climbing. Probably has some awsome throttle response.

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    Thanks, 517 was the peak. Throttle response was excellent! Dont forget our bet!

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    Quote Originally Posted by Vortecpro View Post
    Thanks, 517 was the peak. Throttle response was excellent! Dont forget our bet!

    I can cheat, you know....

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    Didn't exactly put alot of strain on the dyno though did it. A 50 yd dash outside that dyno room would land me in the hospital. As opposed to just rederring me unconscious from a jog at the beach



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  14. #12
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    I'm surprised this thread didn't draw more interest and speculation. It's definitely an interesting build.
    I guess if you cant say anything nice....
    Mark...any numbers available on the heads?

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    Quote Originally Posted by steelcomp View Post
    I'm surprised this thread didn't draw more interest and speculation. It's definitely an interesting build.
    I guess if you cant say anything nice....
    It did. Was just watching. See I know where a truck load of Gen 6 454 and 502s are. REAL CHEAP. I did not buy them because they all have the peanut heads. They are all 4 bolt with a Nitride crank. Now. How much would it cost to flow those lil peanuts?
    No Fool Like A Old Fool is there?

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    My idea Scott is to show some inexpensive builds, most people might not be interested in this type of build. Flow on these 236 heads were .300 236 .400 275 .500 286 .540 292 on the good port @ 28 inchs on a SF 600 4.310 bore. My 9.6 comp version with a 232 @ .050 cam makes 560 HP with 580 TQ

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