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<99 vs. >99 timing set ?

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  • <99 vs. >99 timing set ?

    What's the difference between them and how do I tell them apart?

    I'm not 100% sure on my engine, it's either a 99 or a 2002, and I need to order up a new timing set.

    Can get pics...
    11.92 @ 122 MPH 3400 91 Cavalier Z24 Intercooled S/C. -totalled-
    10.56 @ 130 MPH 3900 LZ9 87 IROC Z28 Intercooled GT4088 Turbo

  • #2
    Here's a pic showing the difference. They are interchangeable.

    MinusOne - 3100 - 4T60E
    '79 MGB - LZ9 - T5
    http://www.tcemotorsports.com
    http://www.britishcarconversions.com/lx9-conversion

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    • #3
      Cool, thanks!

      I definetly have the "new" style.

      Looks like I may upgrade to the old style though, looks beefier. Also 30$ cheaper...

      Would that actually be an upgrade? lol I wonder if the matl' the gears are made of is better for the newer style??
      11.92 @ 122 MPH 3400 91 Cavalier Z24 Intercooled S/C. -totalled-
      10.56 @ 130 MPH 3900 LZ9 87 IROC Z28 Intercooled GT4088 Turbo

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      • #4
        I cannot say which is stronger from personal experience. It seems that the old style would be stronger due to the larger cross section but some people say "not so". If they changed the materials for the links, pins and gears the new style could be stronger. Perhaps the new style gets less wear since it has more teeth thereby requiring less bending as it flexes around the gears.
        MinusOne - 3100 - 4T60E
        '79 MGB - LZ9 - T5
        http://www.tcemotorsports.com
        http://www.britishcarconversions.com/lx9-conversion

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        • #5
          Hey mars, we have a rockwell tester at school. I can talk to my teacher and maybe try to compair the 2 and see if there is a harness diffrence.
          3100 Sunfire

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          • #6
            i for one would love to see that.... would be nice to know which one is ultimatly stronger

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            • #7
              that would be some great info to have before next spring
              Past Builds;
              1991 Z24, 3500/5 Spd. 275WHP/259WTQ 13.07@108 MPH
              1989 Camaro RS, ITB-3500/700R4. 263WHP/263WTQ 13.52@99.2 MPH
              Current Project;
              1972 Nova 12.73@105.7 MPH

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              • #8
                It's safe to say that the Cloyes one is the weakest. Seems everyone who's had one stretched them in a matter of months.
                1995 Grand Am SE

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                • #9
                  I think they changed it mainly to be quieter but no idea which is better for durability stand point. But yeah everyone says get OEM dealer parts. My gear was fine so I re-used it. I did end up with the cloyes chain though but oh well. It ran for YEARS with chain slap noise from a stretched chain with no adverse affects other than sounding like worn lifters so I'm not too worried. It is nice having a quiet engine now though. Loudest noise on it is the injectors hahah
                  sigpic New 2010 project (click image)
                  1994 3100 BERETTA. 200,000+ miles
                  16.0 1/4 mile when stock. Now ???
                  Original L82 Longblock
                  with LA1, LX9, LX5 parts
                  Manifold-back 2.5" SS Mandrel Exhaust. Hardware is SS too.

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