Crank to cam centerline measurement BBC
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Crank to cam centerline measurement BBC

  1. #1
    Ain't Right Racin piston in the wind's Avatar
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    Default Crank to cam centerline measurement BBC

    I'm lookin to put the largest blower pulley I can on the crank. Need an accurate measurement from the center of the crank snout to the center of the cam std location not raised. I cant get in there to get a good reading without removing a bunch of stuff. I'm hopin I can get a 89-90 8mm in there the fuel pump drive had been cut out for max clearance. Dont want to buy a pulley to find out it won't clear. Thanks Craig

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    Senior Member wizbang's Avatar
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    I have a 99t on one of my engines. Uses a RCD fuel pump ext that I sleeved and then milled for clearance.
    I can send you pics of that or even send you a 90 and 99 tooth pulley to use as mock up if you want ?

    I have the BBC blueprints at home, if you want the drawings, sent me a pm with your email address and I'll mail them to you !

    Wiz

    8mm pullies are measured for the most part as 60t measures 6.0, 80t measures 8.0, 89t measures 8.9 etc
    Last edited by wizbang; 08-10-2011 at 02:20 PM.

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    Junior Member p.higgins's Avatar
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    Quote Originally Posted by piston in the wind View Post
    I'm lookin to put the largest blower pulley I can on the crank. Need an accurate measurement from the center of the crank snout to the center of the cam std location not raised. I cant get in there to get a good reading without removing a bunch of stuff. I'm hopin I can get a 89-90 8mm in there the fuel pump drive had been cut out for max clearance. Dont want to buy a pulley to find out it won't clear. Thanks Craig

    5.150" is the std. cam to crank distance on a BBC

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    Junior Member p.higgins's Avatar
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    5.150" is the std. Cam to crank dimension for a bbc.

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    Ain't Right Racin piston in the wind's Avatar
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    Quote Originally Posted by p.higgins View Post
    5.150" is the std. Cam to crank dimension for a bbc.
    Thanks for the help !!! Craig

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    7.60's not quick enough for you?

    8 sec class must really be tough. lol
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    Senior Member wizbang's Avatar
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    Here are the BBC drawings.

    I can email them to you directly if you send me an email address !
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    Quote Originally Posted by wizbang View Post
    Here are the BBC drawings.

    I can email them to you directly if you send me an email address !
    Thanks wizbang. Those can be a huge help sometimes. They are now posted in the Tech Link Sticky at the top of the "dyno forum" front page



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    Good job -Bob!

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    Ain't Right Racin piston in the wind's Avatar
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    Quote Originally Posted by Infomaniac View Post
    7.60's not quick enough for you?

    8 sec class must really be tough. lol
    Well the way I see it is I better make more power so Jeff can see when u bolw that pop off. His eye's are gettin bad & he cant hear $hit. I just tryin to make sure he dont ram u in the a$$ when u lift.

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    www.highflowdynamics.com LakesOnly's Avatar
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    Cool

    It's been my understanding that the dimension in question is 5.152" (Gen 2 blocks raised to 5.552").

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    This post © Copyright 2007-2017 Paul Kane. No copying, linking, printing or otherwise without express written permission.

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