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Old 11-08-2011, 11:57 AM
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subzali subzali is offline
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Join Date: Aug 2005
Location: Denver CO
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Originally Posted by Rzeppa View Post
I have been told that the reason that Toyota's diesels are so quiet and Detroit's are so loud is that Toyota uses indirect injection (precups) and Detroit uses direct injection. I do know that my 1HZ was REALLY nice and quiet, and unlike a powerstroke or cummins, you could actually hold a conversation while standing next to it while the engine was running.
I thought it was the other way around? I thought IDI was louder and DI was quieter. I believe IDI Toyota engines are the B, 3B, H, 2H, 1HZ, 1PZ, 1KZ - and the DI engines are the 13-14-15B, 12H, 1HD, 1KD, and 1VD series.
Matt Miller
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Last edited by subzali; 11-08-2011 at 12:31 PM.
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