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Those with sn93's, how hard is it to turn pulley by hand?
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Thread: Those with sn93's, how hard is it to turn pulley by hand?

  1. #1
    Junior SCH Member
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    Question Those with sn93's, how hard is it to turn pulley by hand?

    I just recently purchased an sn93 and i'm having second thoughts about the condition of it. I almost didn't buy it cause it is really hard to turn the pulley, so i figured something was fried. The person i bought it from assured me that it works absolutely perfect, and that's exactly how it was when he bought it. I'm not worried about being screwed cause i know where he lives and he's not a dirtbag, i'm just wondering if it is suppose to be that tuff to turn. Please let me know. Thanks alot.

  2. #2
    Long Time SCH Member Doug's Avatar
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    The are very hard to turn...don't worry about it. If you couldn't turn at all, then you should be worried.
    14-1 compression 402ci with a little nitrous

  3. #3
    SCH Moderator "SN Guru" speedytang's Avatar
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    40-45 inlbs when turning the front bolt with a torque wrench is about normal
    Last edited by speedytang; 02-06-2005 at 04:12 PM.

  4. #4
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    boy is that a relief, thanks alot guys.

  5. #5
    Senior SCH Member pavement pounde's Avatar
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    How hard to turn pulley ?

    "40-45 ftlbs when turning the front bolt with a torque wrench is about normal", is what most of you say, but when I finished the VR4 upgrade with 1 extra shim to start, I used a clicking ratchet to turn the pulley it says "15 lbf/ft" and the metric size we use " 20 n/m" (Newton/Meter) just wandering
    It must be right I am sure becouse it is very hard to turn the pulley by hand for a whimp like me:guess: but my strong friend could turn it whith his hands
    It is a very litle bit tighter then it was before the VR4 upgrade.
    Greets, Marco
    '91 Chevy 496SS, Edelbrock Pro-flo 2 injection, alu. GMPP heads, blowercam, coolmist water injection, turbo in the works.
    *VIDEO* http://www.youtube.com/watch?v=6ZOdXg0TOdw

  6. #6
    SCH Moderator "SN Guru" speedytang's Avatar
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    It was a miss type above, it is 40-45 inlbs without the rear seal to drag it down.

  7. #7
    Senior SCH Member pavement pounde's Avatar
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    I am not good in the non metric stuff but is 15 lbf/ft corect I am seeing ?
    Greets, Marco
    '91 Chevy 496SS, Edelbrock Pro-flo 2 injection, alu. GMPP heads, blowercam, coolmist water injection, turbo in the works.
    *VIDEO* http://www.youtube.com/watch?v=6ZOdXg0TOdw

  8. #8
    SCH Moderator "SN Guru" speedytang's Avatar
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    Probably with the rear seal installed. I had my units really tight for my Dual setup but it was not for long use on the street to get 15-18psi out of each of those VR4s. My daily driver with fluid installed and on the car takes about what your showing maybe even more. I posted a while back when this came up probably around the same time as this article and I went outside and posted what mine was showing with the belt off but full of fluid. It has been a while back so I can't remember. I will search also.

  9. #9
    Senior SCH Member pavement pounde's Avatar
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    Ok
    Greets, Marco
    '91 Chevy 496SS, Edelbrock Pro-flo 2 injection, alu. GMPP heads, blowercam, coolmist water injection, turbo in the works.
    *VIDEO* http://www.youtube.com/watch?v=6ZOdXg0TOdw

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