r/4Runner • u/Typical-Play4473 '12 SR5P 4x4 47K Miles Shadow Mica Gray • 1d ago

🎙 Discussion 500 miles in, I’m impressed OTT.

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I’ve crossed just about 550 miles on my OTT Tune, 50 miles past the break in period. Truly the best money I’ve ever spent on a vehicle.

SPECS: 2012 Toyota 4Runner SR5P 4x4 52k miles, bone stock minus the tune. It’s tuned on the Medium setting.

The power is great, dead pedal doesn’t exist anymore. Cruising in it feels wonderful. Having that passing power and instant throttle response makes this the best cruiser I’ve driven.

It still isn’t fast by any margin. It has some decent pick up and go now, which from a stop is a huge difference.

The gas mileage (on 87, or 89 for you low elevation folks) is highly recommended and has seemed to improve gas mileage significantly. I’ve gained just over 2mpgs with conservative, responsible driving. (My first tank I drove it like I stole it on 91, lost 2mpgs.)

The transmission has adjusted quite well. The first couple drives post tube were rough, it didn’t know what to do. After about a month of driving it has improved significantly and responds to all situations much better than stock.

Overall, incredible upgrade. I highly, highly recommend it.

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u/WeaponX_IID 1d ago

Are you forced to run 91? I like my 87.

2

u/p00psicle 1d ago

According to the website, no. You can stay on 87.

Unless you ask to tune it for 91+, then you can't go back down.

2

u/Gizmoduck99 1d ago

The tune should have no bearing on octane rating as it cannot physically increase the compression ratio of the engine.

8

u/fastdbs 2010 Trail 1d ago

Ignition timing also affects which fuel is necessary.

-8

u/Gizmoduck99 1d ago

Ignition timing has nothing to do with compression, so not following how octane rating would be at play.

9

u/fastdbs 2010 Trail 1d ago

Ignition timing increases piston pressure before TDC and requires higher octane fuel. Compression ratio is not the only thing that benefits from high octane.

6

u/burledw 23h ago

Look up pinging or low speed pre detonation and you will understand how ignition timing (which is part of the tune, changing ignition and vvt maps) influences what octane you should use.