input on multi groove pulley setup idea
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Thread: input on multi groove pulley setup idea

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    Certified Opelholic davegt27's Avatar
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    input on multi groove pulley setup idea

    I want to make a multi groove pulley setup for the Opel CIH motor.

    but I cant find the specs on the multi groove part. I was hoping someone could help me out or point me in the right direction.

    this what I have so far






    thanks in advance
    Davegt27

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    3000 Post Club blancojp (R.I.P.)'s Avatar
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    Look at a checy S-10 or Chevette lower/upper pullies. Should be very close to what you need.
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    multi

    thanks but I was looking for some published specs

    I have a few Toyota superchargers and a crazy thought came up

    why not put a supercharger on an opel CIH motor

    the problem is the Opel has an old fashion V-belt

    but newer cars like the 1989 MR2 has multi groove setups

    i think this is it

    http://www.misbelt.com/images/pro/sp...ts/microvs.jpg


    plus I need a lathe project for this CNC class I am taking


    Davegt27

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    Dave, you're talking about a serpentine belt pulley on the end of a single groove pulley. That would be a neat piece of machine work, and may have a market, also.




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    Old Opeler GTJIM's Avatar
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    I have been Looking!

    Some years ago I did some Micro-V pulleys and had the code ... but it has gone now - on an old computer hard disk.
    The grooves were cut with VBMT tips with 0.4mm nose radius

    From memory one groove was drawn out on Master-Cam and replecated the required number of times to produce the complete form. It was an SAE standard.

    BTW: Opel CIH motors from 1991-94 (Omegas; Senators and Fronteras) had serpentine belt drives with Micro-V pulleys.

    Perhaps your local Gates belt supplier would be able to get you the specs for pulleys suitable for the serpentine belts they supply - if he is real good maybe even the CNC code! Ask for the Toyota Suprcharger belt/pulley specs.
    GTJim
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    3000 Post Club blancojp (R.I.P.)'s Avatar
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    Quote Originally Posted by namba209 View Post
    Dave, you're talking about a serpentine belt pulley on the end of a single groove pulley. That would be a neat piece of machine work, and may have a market, also.
    It does have a market but will need to be balanced which is why our serpentine setup did not make it too far out the door. In california there is a company that makes them with or without the V-belt add on. See pics enclosed.
    Attached Images Attached Images
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    Certified Opelholic davegt27's Avatar
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    Thanks guys

    Dave, you're talking about a serpentine belt pulley on the end of a single groove pulley. That would be a neat piece of machine work, and may have a market, also.
    I was thinking of making all new pulleys

    Some years ago I did some Micro-V pulleys and had the code ... but it has gone now - on an old computer hard disk.
    The grooves were cut with VBMT tips with 0.4mm nose radius

    From memory one groove was drawn out on Master-Cam and replicated the required number of times to produce the complete form. It was an SAE standard.

    BTW: Opel CIH motors from 1991-94 (Omegas; Senators and Fronteras) had serpentine belt drives with Micro-V pulleys.

    Perhaps your local Gates belt supplier would be able to get you the specs for pulleys suitable for the serpentine belts they supply - if he is real good maybe even the CNC code! Ask for the Toyota Supercharger belt/pulley specs.
    I went buy NAPA and got some of the info and then applied that formula on that link that I posted to come up with the specs

    now I just need to figure out how to draw it

    Thanks
    Davegt27

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    Old Opeler GTJIM's Avatar
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    Specs

    Quote Originally Posted by davegt27 View Post
    I went buy NAPA and got some of the info and then applied that formula on that link that I posted to come up with the specs
    now I just need to figure out how to draw it
    Thanks
    Davegt27
    The 'spec' in that link is not enough to draw pulleys as it is only a partial of the belt itself - you need specs for the pulley grooves.

    The pully has grooves that go right down to a radius - not cut off flat like the bottom of the belt. The cut-off leave clearance room for debris etc.\

    You also need the angle of the sides - some belts are 40 degrees; others are 37 1/2 degrees and others yet are 37 degrees.

    You need to let us know exactly what type of belt you intend to use - what shape/section is it called?
    GTJim
    Opel Owner since last Century!

    Copyright © 2000-2009
    J D Henry
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