VortecPro 496/AFR Oval Ports Dyno Data Sheets
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VortecPro 496/AFR Oval Ports Dyno Data Sheets

  1. #1
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    Default VortecPro 496/AFR Oval Ports Dyno Data Sheets

    Here is the Dyno Data and a pic on the AFR Oval Port heads on a 496 BBC.

    Helping with some computer problems Mark hasClick image for larger version. 

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ID:	81082 so that is why I am posting this stuff.

    Drag up the naysayers and town criers so we can rationally discuss the numbers.

    Regards,
    IG
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    This engine is a 10.8 compression 496 with a 248 @ .050 solid roller, AFR heads, ported air gap intake, 1000 HP carb with a 1 inch spacer, 2 inch headers, horrible 3 inch magnaflow mufflers...
    Last edited by Vortecpro; 09-02-2010 at 04:54 PM.

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    Nice.

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    Hers the information you requested. My question to you CFM is WHATS THE CORRECTION FACTOR? It seems to me over on the intake thread you said it was 1.42, my numbers say 1.30. Whos right?
    Last edited by Vortecpro; 07-28-2010 at 06:58 PM.

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    Thanks

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    That is a killer head for a combo like that. I can't believe it took that long for the aftermarket to catch on to the need for a good small port oval. Of course you can only sell those to people who get it. Because the ones that don't, go straight for the 357s



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    Quote Originally Posted by Vortecpro View Post
    This engine is a 10.8 compression 496 with a 248 @ .050 solid roller, AFR heads, ported air gap intake, 1000 HP carb with a 1 inch spacer, 2 inch headers, horrible 3 inch magnaflow mufflers.
    The Lewis Racing was a hyd roller engine and this is a solid. For the hyd roller to be compared to the lobe area of the solid roller the hyd cam would need to be about 15 degrees larger at seat at least and around 6 to 8 degrees larger at .050".
    Chris Straub
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    Why does the rpm at pk hp change in the corrected and uncorrected sheets.?

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    Quote Originally Posted by cstraub View Post
    The Lewis Racing was a hyd roller engine and this is a solid. For the hyd roller to be compared to the lobe area of the solid roller the hyd cam would need to be about 15 degrees larger at seat at least and around 6 to 8 degrees larger at .050".
    This is opposite of what it is. 2nd nature stuff.
    Remeber what the effect of lash will have on the profile vs no lash.

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    Sir(s),

    I do not understand the crypto-speak. Do you intend to initimate that the area under the curve is substantially affected by the actions in the lash take-up or the clearance ramp zones? Really? How would that have any affect upon the rates of lift vs rotation?

    Thought we were going to talk about the dyno numbers, but if it shifts to bumpsticks instead, let's do a separate thread. Same goes for airflow through the engine although that data indication is certainly in the dyno data as presented. VE? BSAC? SCFM?

    Regards,
    IG

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    Quote Originally Posted by cfm View Post
    This is opposite of what it is. 2nd nature stuff.
    Remeber what the effect of lash will have on the profile vs no lash.
    What about that correction factor CFM?

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    Quote Originally Posted by cstraub View Post
    The Lewis Racing was a hyd roller engine and this is a solid. For the hyd roller to be compared to the lobe area of the solid roller the hyd cam would need to be about 15 degrees larger at seat at least and around 6 to 8 degrees larger at .050".
    Chris, why dont you plot the two cam profiles and over lay them so we can give CFM a much needed education on cam profiles, I would do this but, I dont know what lobe you and Mike used, thanks Mark
    Last edited by Vortecpro; 07-29-2010 at 05:41 PM.

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    Quote Originally Posted by gn7 View Post
    That is a killer head for a combo like that. I can't believe it took that long for the aftermarket to catch on to the need for a good small port oval. Of course you can only sell those to people who get it. Because the ones that don't, go straight for the 357s
    There's another one coming on the market before long.

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