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COBB’s 10% sale ends 3/30. That applies to Accessports and packages, so it’s a solid amount off. For anyone new here, I’m tuning all of these with the Accessport. Everything is based on data from your truck—whether it’s a reflash or full custom with revisions, I’m reviewing logs on every...

9 hours. There is no need to come in though. 99% of the 4Runners and Tacomas I tune are done remotely. You provide me datalogs and I make adjustments based on those and driver requests.

Just say the word! You'll be surprised the difference it can make.

I'd say it's mix of good and “depends how they got it.” Using inches of water (inH₂O) for pressure drop is solid. That’s a standard way to measure restriction across an intake, so that part of the data is meaningful. If that airflow was measured with a calibrated flow bench or an external...

This is a great discussion and it gave me a good idea for my regular tuning discussion thread so I just finished writing this up: Session 12: Airflow Numbers, Intakes, and Why Some Gains Don’t Stick...

It likely would not have a huge impact if any on fuel efficiency. The biggest impact I've seen to fuel efficiency after adding lift and tires is by custom calibration, particularly tuning the transmission so that the engine is working in a more efficient range. Lugging a small engine like this...

Session 12: Airflow Numbers, Intakes, and Why Some Gains Don’t Stick On a MAF (mass air flow) -based system, airflow is not directly measured mass in a perfect sense—it’s calculated based on what the sensor reports and how it’s calibrated. Change the housing, change how air passes over the...

On some platforms or with some intakes, that is definitely the case. In the case of this platform the intakes that I have seen, with the exception of a couple, all run within the allowable authority of the ECU to make adjustments. You are not going to hurt one of these engines by running it...

I like these types of discussions and the answer is yes and no. Here's why: 1. Yes some intakes will show an initial gain until long-term fuel trims populate. That initial gain may be greater than the gain that it would see over time if it was allowed to continue to run a bit leaner. 2. Running...

Their power numbers are likely better because it makes it run a little bit leaner. Right after install you will see higher power numbers because open loop fueling is leaner than factory. After you drive it for a while the long term fuel trims will compensate for this and air fuel ratio will...

if the MAF was backwards, which is actually impossible to install backwards because of the screw spacing on this platform, the vehicle would not run at all.

This is a common misconception: intake does not necessarily increase airflow but it can change the way that airflow is measured. If the diameter of the tube or the placement of the MAF is in any way different than stock, that is what causes check engine lights or variations in air/fuel ratio...

This was not a hybrid. It's not 15 horsepower less because it's a 4Runner. It's 15 horsepower less because it is on lower octane fuel and the ECU is adapting to it by reducing timing and torque targets. I agree that the torque numbers are quite high but they are consistent with what I've seen...

I don’t think I ever said the factory calibration is unsafe — it’s well within a safe operating range. When I say “safer,” I’m talking about increasing operating margin in critical areas. Things like: -more consistent fueling under load (sometimes this means more fuel under load- this keeps...

Tuning isn't for everyone, but to answer your question: “Runs safer” isn’t marketing language — it’s referring to real, measurable things I am reviewing in the live ECU data. When I talk about improving operating margin, I’m specifically referring to, but not limited to: -Fueling consistency...

I understand the public hesitancy to modify a stock vehicle. I can tell you from looking at data on so many of these that in nearly every case a properly custom-tuned calibration runs safer than the factory calibration. With the custom tune you don't have to seek big power gains but simply...

You said it yourself (or maybe AI did): In a high-performance engine, the pistons compress the air-fuel mixture much more tightly to extract more power. 11:1 and boosted is VERY high cylinder pressure.

On an 11:1 Compression engine with a turbo, it absolutely matters. I have a deep understanding on how the ecu works on this platform, and while it "can" safely run lower octane, there are a number of reasons I wouldn't. Lower octane = lower knock resistance. When knock starts, the ECU pulls...

Through 3/30. I know the pain! A nicer driving 4Runner will help you cope with the sting of sending all your money to the IRS though :LOL:

Reflash Tune + Accessport ($969): This is a pre-built calibration that I’ve developed and refined across a lot of these trucks. It’s a big improvement over stock in throttle response, power delivery, and overall drivability. No revisions required Quick turnaround Great option for mostly stock...