Overland Torque Tune (OTT) by Overland Tailor

I thought I seen that these tunes don't void warranty but signed a form saying they do. Can they see it if I get a scan for a CIL?

 

Tuning (Tampering in Toyota's eyes) a vehicle certainly opens you up to the possibility of having a warranty claim denied. Our tune for a typical "stock" truck will not operate the vehicle outside the mechanical or design limitations that Toyota engineers into their systems. With that, your tune isn't going to cause a specific component to fail if it wasn't destined to fail on the OEM calibration.

We include that language in our waiver because ANY change to your vehicle can be used by Toyota to deny a warranty claim.

 

Thank you for that. I'm not worried about it, just a little confused.

 

Legally a dealership cannot void your warranty due to aftermarket parts. They can try and deny you, but only if it's shown that the change caused the failure.

 

@P8trit

I was worried about it.

How the tune would affect my warranty...

And if they would detect it during the ToyotaCare Maintenance Plan. (4 visits so far [2 with OTT Tune] with 1 to go in May)

During every After-Action Review of Maintenance, the OTT Tune was never mentioned. (during the 2 OTT Tune visits)

I'm guessing it's not identifiable at the Dealership Level...but if an Engineer from Japan came over and investigated, that'd be a different story.

 

I got a chance to see Kaleb in China Spring, TX this past Saturday morning to get my Tacoma tuned. The email communication with him the week before was great and he was just as nice and cordial in person. Not going to lie, I was a little bit nervous about doing the tune. I have a habit of worrying about all the bad things that could go wrong, but Kaleb was very reassuring. Once it was completed and I pressed on the accelerator for the first time and spun the tires on accident, I turned into a giddy little school girl and I haven't stopped smiling since. Wow, what a difference! It does what everyone says it does and does it in spades. I'm starting out on the medium throttle setting and slowly getting used to not having to jam it to the floor to get the truck to move. Thank you, Kaleb, and all the OTT people.

 

I went from Medium/Mild to Lite/Mild and like that better.

Medium/Mild was good when I was launch testing it...but under normal driving conditions, I don't feel the need to launch from stop light to stop light.

I'm on OTT 8.0 with Gear Lock and have been rockin' ECT and S-Drive.

If I want quick response, I engage ECT and S-Drive (4) and feel the difference from regular "D" drive.

I need to get the update 9.0.

Time to schedule with Master Yota.

 

When I took mine in for an oil change, I talked to the service manager. He has a TRD Pro. Turns out both of us have tuned our trucks. He actually asked me because he was going to recommend it if I hadn’t had it done already.

 

Question: does the truck’s learning function still work with the tune or is that code removed all together? I suspect that is what causes a lot of unpredictable gear selection which people call hunting, but maybe it still adjusts the map slightly based on driver? Just curious how it all interacts

 

Personally, I think the "adaptive" stuff has been over played..

There's a number of adaptive processes in the ECU/TCU. The most notable being the knock control system. That is very much left in-tact and is what allows the ECU to advance/retard ignition timing to suite the driving conditions and fuel quality run in the vehicle. There are other adaptives that trim throttle actuation, shift schedules/pressures/etc. however, all these systems remain on our tune. We do not remove any functionality in the ECU that Toyota engineered into their systems.

The unpredictable gear selection is due to the way Toyota setup the shift scheduling. It's not a product of the adaptive strategies in the ECU. Specifically speaking in regards to the transmission and how the truck is notorious for shifting oddly, the way Toyota calibrated the shift scheduling leaves a LOT to be desired (obviously!). From our modeling, it appears the strategy for this truck was to maximize fuel economy. As we know the 3.5L isn't exactly a gas sipper, which seems to have driven the engineering team to command upshifts at much lower RPM's than ideal for a proper driving experience. Combined with what I feel is a poorly timed downshift schedules and a throttle map that looks like an exponential function creates the horrid driving experience that is a stock 3G Tacoma.

Simply restructuring the shift scheduling and correcting the throttle curves, does absolute wonders to improve the driving experience. Improving the engines output further enhances this, but that's not a point of discussion here. The base shift scheduling is the root problem. It's not how the ECU processes, or the underlying code or logic. It's just a mapping strategy that I think was poorly done on Toyota's part. Their design and engineering objectives did not factor the driving experience into the equation heavily enough and it appears they were simply driven off of numbers. Where I think they missed the mark is you can still meet efficiency targets and improve driving experience as many report with the tuning options available. It's possible to have your cake and eat some too in some instances.

The adaptive processes are in place to compensate for minor changes/wear/etc. They are not going to completely alter or change the driving experience as the truck learns. If you experience that, it's likely a result of an improperly calibrated map that is showing itself. Your truck should be relatively consistent after a tune unless fuel quality (we see it every year with winter fuel blends especially) comes into play and you find yourself feeling the truck being "neutered" a bit. Fuel quality will be a big factor in performance and fuel economy. High concentrations of ethanol will cause fuel economy to suffer. Some fuels are watered down and have very little ability to support any ignition advance. This will adversely affect performance and even fuel economy. In summary though, the adaptives for the most part (aside from the knock control system) will not affect your vehicles performance in a meaningful way.

 

I'm not running your tune, but I have noticed on OEM, 02, 04, OVT, OVT2.0 and KDMAX7/8/9 that I get hesitation on humid / wet days, and crisp response on dry days. Did you notice this / have a fix for it?

 

Hot/humid days can definitely degrade performance as you heat soak the engine bay. High intake air temps will retard timing (if high enough) and that'll have an effect. But I'm not aware of any specific instances or occurrences of hesitation simply due to humid or wet conditions with our calibration. I'm not sure I can say we have a fix as it was not a problem we ever encountered.

Have you done any datalogging to see what is happening when you feel the hesitation?

*Edit* By chance, do you have an aftermarket intake?

 

Im in Florida where you can't get much more humid and hot. I'm currently on OTT and none of my customers have reported issues related temp/humidity. When I use to be on OVT and KD back in the day I do recall shifting/hesitation but don't remember/can't say if it was related to temp/humidity.

If you're ever in Florida let me know. I have a couple test vehicles you can drive. Same offer for anyone.

 

Not even hot and humid. Just humid/damp in general (in Toronto it is significantly more humid than outside of the city). I notice on damp days that it has a hesitation on tip in (especially noticeable when letting off for a corner, then trying to smoothly lay-in to the throttle to accelerate without it jerking around)

I have stock intake with TRD flow accelerator, urd equal length exhaust, ngk ruthenium nx plugs otherwise stock. No datalogging yet...

 

I don't see any reason you should have an issue caused by hardware/parts.

If I can help, let me know. I'd be happy to send you a test file locked to your VIN to see if it helps at no cost.

 

Is there anything for the Bay Area? Also will this affect smog?

 

We have 100's if not a 1000 trucks in CA running OTT. As long as you have all mandated/OEM installed equipment you'll be just fine.

We DO NOT turn off CEL's or delete emissions equipment/functionality in our tunes. If your truck will pass stock, it will pass just the same with OTT.

 

Thanks. I’ve been thinking about a tune so maybe soon here I’ll actually pull the trigger.

My main complaints are it down shifts while coasting too early so the truck is decelerating when it gets to 1st

And if you hit a red light and barely start braking it does something then if you speed up again because it turns green it really hesitates and clunks into a gear finally

And also gear lock sounds nice. I hate that the truck decides to downshift when braking down a hill. When I’m in 2wd but in patchy ice conditions I want to brake only when I can see I’m on dry pavement. Having the truck downshift effectively biases braking in the rear and means it’s closer to sliding (which happened once, learned my lesson)

 

im in a Humid State also. I’m in Hawaii so I’m surrounded by water. My truck is very similar to your setup as I have stock intake with TRD filter and Spec U exhaust setup with equal length setup on a 2019 with OTT. Only difference is that I’m on 5.29 gearing. But prior to having gears installed, I haven’t had any hesitation issues that you describe while on OTT. But to really pinpoint and see what’s happening, data logging would definitely help identify what happening.

 

Living in Louisiana for the last 18 months and after spending 3 years in GA and growing up in FL, Louisiana is the most humid and temperature-ridden place on earth. With that said, I agree engine performance is affected by humidity and air temperatures proved, and scientific data support it. I will say a tune from OTT and probably others are only affected in the same way a non-tuned, normally aspirated, or forced injection would react. Personal experience is the ECU makes the best adjustments from sensors to smooth out performance regardless of where you live. The bottom line is a performance tune will provide significant performance and drivability changes unmatched by any other power adder regardless of your environment, regardless of humidity and temperature.