V belt

Discussion in 'Race 400/430/455' started by D STAGE 2 455, Apr 8, 2021.

  1. D STAGE 2 455

    D STAGE 2 455 Well-Known Member

    I Have billet pulleys ( crank & water pump) on my 455, the crank pulley is under driven.
    What are you guys using for an alternator belt in this application? I only need 1 belt
    to drive the alternator and water pump, I have no power steering or AC.
     
  2. buick64203

    buick64203 Just plum crazy Staff Member

    Take a piece of rope, wrap it around the pullies and measure the length. Bring that measurement to your local auto parts store and get the same length belt
     
  3. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    Make sure you put the alternator midway in it's adjustment before you do the rope thing. That way, you'll be able to get the belt on, and tighten it up.
     
    PGSS and Smartin like this.
  4. D STAGE 2 455

    D STAGE 2 455 Well-Known Member

    Yeah, I have a Taylors tape measure. I was hoping someone knew a part number for an application
    like mine. The parts counter people aren't as sharp as they used to be 20-30 years ago.
     
    PGSS and Max Damage like this.
  5. Max Damage

    Max Damage I'm Working on it!

    I have used the rope trick and the O'rielly people (kids) give me the wrong belt twice now! Sheesh, I guess they don't know how to measure.
     
  6. buick64203

    buick64203 Just plum crazy Staff Member

    If you know the length, you can put the part number together yourself. In dayco, the first 2 numbers is the width and the last 3 numbers is the length.

    For example, the widths are 13,15 and 17. 15 is the width for a standard v belt. If your measurement is 48 1/2", that would make the last 3 numbers 485. If you needed a 48" belt, it would be 480.


    So a 48" long v belt for your alternator would be 15480 as as example
     
    462 Chevelle likes this.
  7. D STAGE 2 455

    D STAGE 2 455 Well-Known Member

    Excellent information, this is what I was looking for. Thanks Jason.
     
  8. GS Kubisch

    GS Kubisch THE "CUT-UP" BUICK

    Jeff,

    Is this for your Wagon?

    Didn't know if it ever sold.
     
  9. D STAGE 2 455

    D STAGE 2 455 Well-Known Member

    Gary, no it's not for the wagon. I still have the wagon, it's on the back burner.
    This is for my '77 coupe deville (Stage 2 powered) sleeper.
     
  10. hugger

    hugger Well-Known Member

    In shorter than stock
     
  11. D STAGE 2 455

    D STAGE 2 455 Well-Known Member

    15480 is the exact belt that I needed. Bought one today:D
     

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