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  1. isturbo

    Honest question: how much have turbo 1UZ builds actually evolved since 2015?

    Good question and one I think about a lot. Active builder here, currently on a turbo VVTi build, been at this on and off since around forver. What's actually different in 2026: Turbos at the budget tier are dramatically better. The G-series Garretts and the various billet-wheel options from...
  2. isturbo

    Heat-related ignition coil failure on 1UZ

    Long time, mates. Saw a discussion on an Australian forum recently about a 1UZ miss that only showed up at cruising speeds, got worse in hot weather, and was worst with the A/C on. Turned out to be the ignition coils breaking down under heat. The miss doesn't throw codes cleanly, it's...
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