While the path to forced induction for most SC owners has been the tried and true 1JZ-GTE engine swap others have opted for a less conventional path to big power; the Mk4 Supra 2JZ-GTE swap.
Q. So the question really is, 1jz-gte vs. 2jz-gte? Both engines make around 280hp, but the smaller 1JZ has a 2.5l displacement with the larger 2JZ displacing 3.0l. Both engines are factory twin turbo-charged…so which one has greater potential?
A. As a rule of thumb the larger the displacement, the more power a motor has the potential to make. Now, before we get flamed for that statement there are a few obvious exceptions to the the rules of displacement… Forced induction is arguably the main replacement for displacement, but while you can tune a smaller motor to make more power then a larger stock motor you are in fact always going to be ultimately limited by your displacement. To that end, some motors have been better engineered than others… Better balancing, valve trains and so forth make a huge difference when it comes to tuning out and engine and maximizing available performance. Simply put, the motors that perform best are the most efficient… But this is all common sense really, the real questions come down to how readily available are parts are what your project budget is. As far as choosing between the 2JZ and the 1JZ, it’s our beleif that the 2JZ is the better choice for more power, and far greater US parts availability courtesy of the strong Mk4 enthusiast community.