Blower pulley measurement
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Blower pulley measurement

  1. #1
    Senior Member BAHNER79AUSTRALIA's Avatar
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    Default Blower pulley measurement

    Can anyone with a blown Chevy close by help me....

    I am mocking up my 496ci Big Block Chev in my Bahner and need to know the distance from the front of the block (timing cover surface) to the end of the crank blower pulley. I will be running 1V accessory pulley & 6-bolt multi keyway balancer with standard blower assembly (8/71 kit).

    Trying to determine how far the crank pulley will sit out from the front of the block so I can allow myself enough room to glass in a bulkhead. (Haven't purchased a blower kit yet)

    Anyone got a similar setup on their ride or sitting in the garage that they can take a quick measurement for me?

    I'm guessing 6"???
    If its too loud.... Your too old....

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    youre in the ballpark ,mate

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    Senior Member ICECREAMAN's Avatar
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    Here ya go, I am doing a BBC with basically same set up 51/2". Good look.
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    Senior Member BAHNER79AUSTRALIA's Avatar
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    Quote Originally Posted by ICECREAMAN View Post
    Here ya go, I am doing a BBC with basically same set up 51/2". Good look.
    Click image for larger version. 

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    Champion! I will however be running a balancer also, which will push mine out further....
    If its too loud.... Your too old....

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    Quote Originally Posted by BAHNER79AUSTRALIA View Post
    Champion! I will however be running a balancer also, which will push mine out further....
    Hang on Lee. I'm finishing up my morning coffee but can get you a measurement since I'm running a balancer as well.

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    Half a bubble off jrork's Avatar
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    Lee, from the Timing Cover bolt flange to the end of the pulley I have 7 1/2". That is with a dampener as well as a 2V pulley.

    Good luck...........john

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    Senior Member BAHNER79AUSTRALIA's Avatar
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    Quote Originally Posted by jrork View Post
    Lee, from the Timing Cover bolt flange to the end of the pulley I have 7 1/2". That is with a dampener as well as a 2V pulley.

    Good luck...........john
    Yikes that's a long way! Thanks John you the man.
    If its too loud.... Your too old....

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    gn7
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    Bahner, jrork's measurement with a 2V pulley. That adds about 3/4. And IceCreaman's appears to be from the front of the motor plate, not the timing cover surface.

    Keep in mind that some dampers put the pulley at a different point. My ATI is very close to a plain hub, but my ProRace sets it further from the block by about 1/4". A Romac would be very very close to the length of the ProRace.



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    Last edited by gn7; 04-08-2012 at 03:27 PM.

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    Senior Member BAHNER79AUSTRALIA's Avatar
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    Quote Originally Posted by gn7 View Post
    Bahner, jrork's measurement with a 2V pulley. That adds about 3/4. And IceCreaman's appears to be from the front of the motor plate, not the timing cover surface.

    Keep in mind that some dampers put the pulley at a different point. My ATI is very close to a plain hub, but my ProRace sets it further from the block by about 1/4". A Romac would be very very close to the length of the ProRace.
    Thanks Bob.

    Yeah noticed Icecreamans measurement from the front of his cover. While i mock up the engine, i am measuring from timing cover mounting surface on the block.
    I am using a Powerbond Race series 6-bolt, multi keyway BBC blower balancer, made right here in my home town by Precision parts in Australia. (Different company to whom makes the Romac)
    Its SFI approved, laser engraved, real nice piece and the shop is only 5 mins away.

    Perhaps i will allow myself a good 10" to be safe. (Need to be able to get a socket wrench on the front of the crank without having to pull the motor!)

    Last edited by BAHNER79AUSTRALIA; 04-08-2012 at 04:46 PM.
    If its too loud.... Your too old....

  12. #10
    gn7
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    My guess that will set the pulleys about the same place as a ProRace and Romac. The only thing I have seen that sets the pulley further back is an ATI, or a plain hub.



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