Jdm 2jz9/27/2023 Ignition coils are also known to go occasionally. Early versions of the engine can also give problems with the VVTi system, causing rough engine idle, misfire, and knocking sounds from the engine head. The main reason for a failed water pump on a 1JZ is the plastic impeller, which is known to be short-lived. This is a problem typical for BMW straight-six engines, but we also see it here. The water pump is one thing you have to watch out for in a 1JZ engine. The 1JZ is generally known to be a very stout unit, capable of big power, but that doesn't mean it's without its weaknesses. A shorter stroke also means it takes more time to spool the turbocharger. The 1JZ’s shorter stroke means it loves to stay in high revs, but it lacks low-end torque. Nevertheless, their cast-iron bottom ends are some of the strongest ever made, even today.Īs far as applications go, the 1JZ’s more rev-happy character makes it perfect for drift builds, since staying in the upper part of the rev range is crucial to maintaining a slide, as well as making crisp transitions. Obviously, there are builds out there that are pushing way more horsepower than the numbers here. ![]() ![]() If we turn this into simple math, we can see that the 1JZ’s bottom end is good for roughly 260 horsepower per liter, while the 2JZ’s bottom end is good for around 266 horsepower per liter. In reality, the stock bottom end of the 1JZ can take around 650-700 horsepower reliably, while the 2JZ can take 800. ![]() Therefore, at equal power levels and with similar modifications, the 2JZ will be more responsive, as it has more displacement power. There is a direct correlation between engine displacement, turbo size, and drivability. This will be even more obvious with single-turbo conversions since a single big turbo takes more time to spool than two smaller turbos.
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