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  1. 2.2L - 2nd gen 4-banging
    So I just put on a flow fix muffler on my 4 banger and found out that when I hit 5600 rpm I can do some poping. I want some help to find a tune that would lower the poping threshold to about 3500 rpm that can be turned off and on when I want to. If anyone can help me with my quest I would really...
  2. 262ci Forum (4.3)
    I've got a 91 4.3 z I've been curious about a "custom tune". At what point is a "tune" required or at least beneficial in some way I've got headers, edelbrock tbi int, adj f/ p regulator,underdrive pulleys, e fan, tbi spacer, injector pod spacer, hogged out the tbi. Msd ignition, etc. Any...
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