Overland Tailor Tuning (OTT) - 4G (2024+) Tacoma Development

JustDSM · Sep 22, 2024

We know many of you have been eagerly reaching out about the latest developments for your 4th Gen Tacomas, and we appreciate your enthusiasm! While we’re still fine-tuning a few elements and conducting essential tests before our official release, we couldn't resist giving you a sneak peek at what’s coming.

With the OTT Beta calibration and premium fuel, the 2024 Tacoma is poised to deliver like no previous Tacoma. Stay tuned—we’re committed to bringing you the performance and capability that the Tacoma enthusiast craves!

With that said, I think it's only fair to give you guys a sneak peek of what you might expect from OTT on the 4G Tacoma:

RED - Unmodified 2024 Tacoma, as delivered from the dealer
BLUE - Above, but the addition of an OTT Beta calibration on premium fuel.

Gurvy522 · Sep 22, 2024

Was this on 91 or 93?

You guys planning on playing around with E85 at all, or are the injectors pretty maxed out?

JustDSM · Sep 22, 2024

Gurvy522 said:
Was this on 91 or 93?

You guys planning on playing around with E85 at all, or are the injectors pretty maxed out?

This was on 91 Octane.

We certainly appreciate the benefits of E85, but it’s important to note the Tacoma is not equipped with flex-fuel capabilities. This means it lacks the ability to automatically adjust fueling based on the varying ethanol content found at E85 pumps, which can range significantly from 51% to 83% ethanol. To run pump E85 safely, you'd have to measure the ethanol content of each pump at the time of fill up and do the the requisite math to calculate the final ethanol content of the tank assuming the blend was a different mixture in the previous fill-up.

In our opinion to do it properly and safely, it's too much hassle for the end user.

However, the system would have sufficient headroom for injector capacity to accommodate the additional duty cycle required for E85.

Gurvy522 · Sep 22, 2024

Nice numbers for 91. Maybe once the warranty is up, I'll take the plunge. Is this done via ECU flash or piggyback?

JustDSM · Sep 22, 2024

Gurvy522 said:
Nice numbers for 91. Maybe once the warranty is up, I'll take the plunge. Is this done via ECU flash or piggyback?

ECU Reflash.

Duce95 · Sep 22, 2024

I’m been in contact with my local flasher, Eddie. Can’t wait to give it a go!

maxx075 · Sep 22, 2024

Duce95 said:
I’m been in contact with my local flasher, Eddie. Can’t wait to give it a go!

Is he registered?

Duce95 · Sep 22, 2024

maxx075 said:
Is he registered?

Yep. Eddie Erosa in AZ

AltarBoy · Sep 23, 2024

Will this be a 91 octane only tune or will there be a 87/89 version as well?

JustDSM · Sep 23, 2024

AltarBoy said:
Will this be a 91 octane only tune or will there be a 87/89 version as well?

The results above are on an adaptive calibration, meaning you can run all regular grades (though we advise 87+) through premium without needing to retune the truck.

We'll be sharing performance data on how this adaptive file reacts to 85-91 Octane shortly.

Tacocho · Sep 23, 2024

Will this tune also work on manual transmission trucks? Or will you guys release a separate tune for those?

JustDSM said:
We know many of you have been eagerly reaching out about the latest developments for your 4th Gen Tacomas, and we appreciate your enthusiasm! While we’re still fine-tuning a few elements and conducting essential tests before our official release, we couldn't resist giving you a sneak peek at what’s coming.

With the OTT Beta calibration and premium fuel, the 2024 Tacoma is poised to deliver like no previous Tacoma. Stay tuned—we’re committed to bringing you the performance and capability that the Tacoma enthusiast craves!

With that said, I think it's only fair to give you guys a sneak peek of what you might expect from OTT on the 4G Tacoma:

RED - Unmodified 2024 Tacoma, as delivered from the dealer
BLUE - Above, but the addition of an OTT Beta calibration on premium fuel.

MoCat19 · Sep 23, 2024

Yes curious to hear about a manual. I’ve yet to see anyone dyno a manual trans

JustDSM · Sep 23, 2024

Tacocho said:
Will this tune also work on manual transmission trucks? Or will you guys release a separate tune for those?

We're in the process of evaluating the manual calibration data, but as things stand, I believe manual calibrations will have the same net gain (potentially slightly more).

We'll be sure to report on this as we dive deeper into the manual calibrations. More to follow on this. Great question!

MoCat19 said:
Yes curious to hear about a manual. I’ve yet to see anyone dyno a manual trans

If there is anyone in the Salt Lake City, UT area or willing to come to Salt Lake with a manual 4th Gen Tacoma - We'd love to get some data from you. OTT will provide free calibration and dyno session in exchange for your time.

Mygallon · Sep 23, 2024

Justin, I have a couple questions for you.
I had the OTT Tune on my 2023 3rd Gen. During my ownership of it, the dealer had my Truck 2 times for service. One of those visits addressed a transmission issue. One of their steps was to validate the latest code. In my case, the Toyota dealership could not detect the OTT tune and they thought it was Toyota's latest.

Also, on my 3rd Gen, the “ECT Switch” was programmed for an additional tune. In my case, I had the default as the Mild tune. A flip of the “ECT Switch” and now the tune was Spicy.

Question 1
Can the Toyota dealership detect If a 4th Gen has been reprogrammed with OTT tune? Should I expect the same experience at the dealership as I did with my 3rd Gen?

Question 2
My 4th Gen is a limited model. The limited has 5 different drive modes from ECO, Comfort, Normal, Sport and Sport plus. Will OTT utilizes this “Drive Mode Switch” and program your tunes to these 5 switch positions?

Thanks - Mike

Independence Overland · Sep 23, 2024

The OTT tune on my Fj Cruiser made such a huge difference. Curious to hear what people think of these tunes. This applied to a hybrid will get over 500lb-ft of torque no doubt. Pretty nuts!

Is there any potential to tune the hybrid systems on these? I would love it if eco mode would actually do something.

Overland Tailor Tuning (OTT) - 4G (2024+) Tacoma Development

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