Why You Should Tune Your Maxima/Altima After an HR Engine Swap?

Last Updated: 04/20/2024 @ 07:02 pm

Every engine swap requires tuning. Why? Without proper tuning, the engine control unit (ECU) will operate on a low timing map up until around 5000 RPM. After that, it starts to add more timing, and you’ll notice the vehicle suddenly accelerate. However, performance will be suboptimal—expect lower power and reduced fuel efficiency.

For those driving engine swaps without a tune, your perception of the car’s power is likely inaccurate. However, if you’re satisfied with an untuned swap, just imagine the significant improvement a tune can make. In the past, enthusiasts would install new engine swaps without tuning them and then compete against first-generation cars, often losing by significant margins.