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  1. D

    1HZ vs 1HD-T - Pros and Cons

    It's all about Peak Cylinder Pressure. The easiest way to keep Peak Cylinder Pressure safe is to limit boost. You can run higher boost as long as your fuel loading and injection timing are sympathetic to the overall goals. But this requires more understanding than the average owner has...
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    1HZ vs 1HD-T - Pros and Cons

    Depends on your pistons and compression. High compression and unreinforced pistons don't take kindly to too much boost. If you've got Alfin pistons then they'll be okay with a little more. But ultimately putting bigger boost into a high compression IDI engine means you're doing it wrong.
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    1HZ vs 1HD-T - Pros and Cons

    The 1HZ uses more fuel to produce more heat and less power. The higher compression and weaker pistons mean it must be run carefully with a turbo. It makes no sense to take that if you have the option of a factory turbo engine. 1HD-FT is your best bet. But probably hardest to find. 1HD-FTE...
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