Deep grove pulleys on 73 z28 with AC ???

Discussion in '1970 - 1973 Specific' started by Crazy4camaro, Jun 15, 2017.

  1. McCune

    McCune Veteran Member

    622
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    Aug 22, 2015
    st.george utah
    The 73 non A/C Z28s have the same pulleys as the LT1 excluding the alternator.
     
  2. 70 SS/L78

    70 SS/L78 Veteran Member Lifetime Gold Member

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    May 5, 2005
    Rockford, MN
    Thanks for correction. ;)
     
    McCune likes this.
  3. twozs

    twozs Veteran Member

    8,418
    78
    Aug 5, 1999
    hopewell jct ny
    It was more or less to do with the rear gear with the z28 . With air is a 3.42 with out 3.73 . You can get any engine to spin 7 grand solid lift or not . Is it still making power , doubtful . The compressor is good to about 6000 rpm before it possibly detonates . Compressors were expensive to replace under warranty . Reducing the max rpm ( in gear ) help for this . There was AC on the solid lift LT1 vette in 72 due to demand.
     
  4. Crazy4camaro

    Crazy4camaro Veteran Member

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    Dec 30, 2015
    Greenville SC
    This is the 73z pulleys
    [​IMG]
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  5. Crazy4camaro

    Crazy4camaro Veteran Member

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    Dec 30, 2015
    Greenville SC
  6. Crazy4camaro

    Crazy4camaro Veteran Member

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    10
    Dec 30, 2015
    Greenville SC
    1973 LT Z28 65000 miles
    [​IMG]
     
  7. 70lt1z28

    70lt1z28 Veteran Member Gold Member

    1,172
    131
    Oct 3, 1999
    Beavercreek, Ohio, USA
    On the 72 Vette LT-1 with air the tach had a reduced redline of 5600 to save the compressor.
     
  8. Crazy4camaro

    Crazy4camaro Veteran Member

    201
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    Dec 30, 2015
    Greenville SC
    Im glad you brought up tachs, This one has a 5000 redline. Is it correct for the ac cars????
    [​IMG]
     
  9. twozs

    twozs Veteran Member

    8,418
    78
    Aug 5, 1999
    hopewell jct ny
    [​IMG] Not really . It was only available with auto trans and 3.55 rear was the steepest and only gear available . Unless you got something that says it had an electronic rev limiter. Hell , it still had points in 72 .
     

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    Last edited: Jun 18, 2017
  10. twozs

    twozs Veteran Member

    8,418
    78
    Aug 5, 1999
    hopewell jct ny
    all Z28 [​IMG]
     

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