2026 4Runner TRD Sport Dyno Results (Stock vs Tuned on 86 Octane)

[CAMTuning]

Had the opportunity to get a 2026 4Runner TRD Sport on our dyno.


Truck is bone stock, ~3,000 miles, running 86 octane.


For context, I have extensive remote tuning experience with this platform, and have many Tacomas on our dyno, both gas and hybrid.
This was a great opportunity to have a local one on the dyno and validate what we’ve consistently been seeing in logs.

Baseline

• 255whp / 353wtq
• KCLV: 13
• Lean behavior through peak torque
• Roughly ~15whp lower than most Tacomas we’ve tested

So not just low octane — also a softer baseline than expected for this platform.

After Tuning (Still 86 Octane)

• 292whp / 404wtq
• KCLV increased to 17
• Fueling corrected — especially in the peak torque region, now safer than stock under load

Gains

• +37whp
• +50wtq

Observations

• The lean condition in the torque region matches what we’ve seen on the dyno and remote tuning.
• Same engine/platform — Baseline and gains are in line with 91, but lower peak numbers due to octane limitation.

Bigger Picture

Having tuned a large number of these remotely, the patterns were already there in the data.


The dyno just confirmed it:

• Stock calibration isn’t always ideal under load
• Even on 86 octane, you can improve power and safety at the same time

Not trying to turn this into a stock vs tuned debate — just sharing what shows up when you actually measure it.

Bottom Line

• Same 2.4T platform (Tacoma / 4Runner)
• Same trends in logs and on the dyno
• And even on 86, there’s meaningful room for improvement when it’s calibrated properly

Sponsored

 

[Pappy]

That's interesting. So, compared to my truck the 4Runner made 18whp & 68lbft more than mine on 91.

 

[CAMTuning]

That's interesting. So, compared to my truck the 4Runner made 18whp & 68lbft more than mine on 91.

Yeah but much lighter wheel and tire combo.

 

[CAMTuning]

I'm back with the information I promised I would get. I spent almost three hours on the dyno, letting the vehicle cool down between runs, and I took the best of four runs in all cases.

One thing that I have characterized on both the 4Runner and the Tacoma is that the first run after an ECU reflash always reports lower power on the dyno. I have not quite nailed down why but it is something with ECU learning certainly.

On the stock tune with 91 octane the KCLV value was 18 to 19, meaning that the confidence level of the ECU was very high. When I first dynoed it on 86 octane it was 13 to 14, meaning that it was actively reducing timing. I did runs on the stock map and then I tuned the ECU on 91. You can see that in the very low RPM there was not a big difference but in the higher RPM when charge temps start to climb and knock is a lot more likely, the 2 curves diverge quite a bit. You will notice that I used a different base line here, and that's because we dynoed on 86 again, and it was warmer today. I wanted to have a direct, same condition comparison to keep everything as accurate as possible. This was the best of 4 runs, with the lowest being 242whp. 91 was added on a low tank, so there was still just a small amount of 86 in it.
In summary:

• Peak HP was just over 14whp higher on 91 vs 86, and tq was ~10wtq higher. I didn't quite nail the run start on the 86 run, so I will say that the peak tq gains were likely a little less. What you'll note is that the hp and tq curves begin to really separate around 4200rpm, and stay apart.
• You'll also note the bump in both 86 and 91 octane runs around 5000rpm. This has been present on every stock tuned 2.4T I've tuned. You'll note that it's not present in the 91 octane tune.

Sponsored