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Thread: 3400 Timing chain upgraded?

  1. #1
    Captain of the Failboat SappySE107's Avatar
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    3400 Timing change upgraded?

    THe older blocks all use a 20/40 tooth setup. In 2000, the 3100 and 3400 both got a 25/50 tooth setup. Is there a reason GM went with more teeth/linkages? Which would be stronger by design? Im looking for the strongest timing chain I can put on a 3400.
    Last edited by SappySE107; 07-13-2006 at 11:33 PM.
    Ben
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  3. #2
    hmm good question, I have a 99 engine, id be intrested to know this as well.

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  4. #3
    Site Coder bszopi's Avatar
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    Looking at a couple press releases on some other new 660s, higher tooth chains are for NVT issues, not necessarily strength. Since GM has been pushing for improved NVT on these engines over the past several years, I'm betting that is the reasoning. So if you want a quieter chain, go with the higher tooth count.
    -Brad-
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  5. #4
    Perpetual Learner boarderbob's Avatar
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    Forgive my ineptitude, but what is NVT?
    Health is merely the slowest rate at which one can die.
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  6. #5
    Site Coder bszopi's Avatar
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    Noise, Vibration and something else I can't remember...
    -Brad-
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  7. #6
    ...ticking?
    Brian

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  8. #7
    mine hp/w8 will pwn j00z
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    Noise Vibration Techniek i think according to google results

  9. #8
    that may explain why many 00+ engines see even with 70-80k miles are quieter than my 99 3400 with 90k 85k on it.

    1995 Monte Carlo LS
    3400 SFI 60v6
    FFP Underdrive Pulley, S&S Headers, LSD, ODBII Swap, DHP

  10. #9

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    I always heard NVH (Noise, Vibration, Harshness).
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  11. #10
    Site Coder bszopi's Avatar
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    Maybe it is NVH... That makes more sense. At least I got 2 out of 3 correct. :P
    -Brad-
    89 Mustang : Future 60V6 Power

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