Overland Torque Tune (OTT) by Overland Tailor

Hey OTT,
I have a supercharged 2nd gen with a few supporting mods.
I'm definitely interested in getting a custom tune for the truck, as well as a trans tune to improve shifting. I am also aware of a valve body upgrade for my auto transmission.

Regarding a trans tune and physical upgrades, is there one that should be done first if that matters?
I'd think they would obviously complement each other; however, I only have funds for one of the other at the moment.

 

I take a slightly different approach than what conventional wisdom would suggest. Getting everything installed and on the truck prior to the tune is what follows that conventional process. And while that works for our custom tunes we prefer a slightly different approach as most of our custom tuning is done remotely and we have no way to verify the condition of the vehicle, is it mechanically sound and ready for tuning, are the modifications or even maintenance items performed/installed properly, etc.

Experience has taught us that not everyone's installs are done *properly*. And this poses a problem for the calibrator who has a highly modified truck and the engine/transmission isn't working right. The issues then become the tuners problem and we're stuck diagnosing and proving there's an install error or problem with a faulty part. Not how we like to spend our time and it's frustrating for both the customer and us.

So generally prefer to have folks with "big plans" tune the vehicle when it's in stock form. Establish a baseline for the vehicle and then start the build. Adding a part or two at a time and work the build-up to the final phase so if issues present themselves you're not having to troubleshoot the entire vehicle for what might be causing something. You can isolate and narrow down your variables list to a single part or two that was last worked on, and if needed return that part or two back to the original condition and confirm the issue to be attributed to those parts or the installation of those parts.

With all that said, for your valve body, are you wanting to firm up the shifts?

If firmer shifts are what you're after, we make some tweaks in the 2G S/C tunes to firm up the shifting and have the ability to do more (or less) to dial things in if that's what you're after. This is a good opportunity to see what we can do and if it meets your need without having to spend additional funds on a mod that might not be needed. If you find that the tune doesn't give you all that you're looking for, the valve body upgrade is still always possible and can be accommodated for in the calibration.

I know coming from us, it's going to be biased but the things we can do with the tune cannot be addressed by the valve body. And the things the valve body does can to a degree be done within the tune.

I'm confident you'll get far more bang for your buck with the tune than the valve body upgrade.

 

That makes perfect sense.
Conventional wisdom becomes the harder way to do things with so many variables... The truck engine is not stock by most measures:
- Volant CA Intake
- Borla cat-back
- TRD SC
- 2.85" pulley
- RB Solenoids
- 3 Degree cam gears
- CSF radiator
- 160-degree thermostat

TY for the guidance! There are no real issues currently, but I notice some soft/flaring shifts when accelerating at higher throttle inputs.
I shall go for the full tune first, as that sounds like it will satisfy my needs!

 

That setup will greatly benefit from the tune.

The Volant intake will require MAF scaling to compensate for the difference in the OE MAF housing diameter. Many of these intakes throw CEL's because they are far enough out the fuel trims can no longer compensate for the airflow error. We'll correct that with the tune, and it's likely you'll see a fuel economy improvement from this alone.

Are you on the TRD Cal or the BD Cal?

 

Oh cool, I don't have any codes at the moment -- and don't even have too bad of MPG considering 35" tires, long travel, and fiberglass fenders! usually about 15-16mpg mixed driving.
But I'll always take more.

I am currently on a tune you actually flashed onto an ECU about 2yrs ago, as I bought the SC used. I believe it is the TRD calibration.

 

@JustDSM this may be in here somewhere but I didn't catch it: I need to replace my battery, will I need to reflash the tune once I disconnect the existing battery?

Thanks for the help - this tune is amazing.

 

No, the ECU is non-volatile memory. You will not lose your tune.

 

No sir! It’s not going to be erased as @JasonLee mentioned.

 

Thanks! And thanks for letting me ask a redundant question.

 

So what was the reason the 84mm isn't going to happen? Fueling issues or just to much for the motor to handle safely? Any insight on it at all?

 

What throttle setting are you at on your tune? I just got mine done on Saturday and my in town fuel mileage seems to be a bit worse but I think it might be from my throttle setting. It’s medium i believe or whatever the default they tune manuals too, so there’s a bit less finesse. Or that extra torque isn’t coming from no where and it’s probably sucking more fuel. I’ll probably get used to the throttle input but I’ll get it brought down a setting next time the tuner is in town.

 

• I'm not sure what throttle I've got. I told my tuner I wanted it as close to "drive by cable" as possible. I can check with him and get back with you if you want. It's a little touchy, much more so than stock. I think your word "finesse" is about right. In order for me to get the MPG's I do, I have to try to drive it like it was stock. With OTT it's not that easy sometimes as it really wants to go. It's a whole new kinda fun with the truck. I just got back from another 200mi trip, this one was all 55-60mph 2 lane roads. I got 23.4mpg's. That included 2 full throttle passes and around 10 stops. I'm convinced now that OTT is getting me better mpgs than stock. I just had to "retrain" my right foot to be really "easy" with the gas pedal. Let me know if you get the throttle lightened, and if you like it better. If you do I might get mine lightened too.

 

Looking for someone in the Seattle area to chat with about getting a tune done for my third gen!


Thanks!

 

I will be up in the Seattle area this Saturday/Sunday. Let me know if you would like to schedule something.

 

visit the website, make contact.
https://overlandtailor.com/retailer-locations

 

@33rsoftoys, I have a manual too and I was wondering what flavor you went with. I have a Speed Booster and like that I can change the sensitivity of the throttle, I'm in Florida and when it rains I can always bring it down so I'm not spinning my wheels.

 

I honestly don't know. I told him I wanted it the same as drive by cable. It's a little touchy though. I might go back and see if he can lighten it up a little. That torque, below 3000rpm is what I was after, and it's sure got it now. It feels more like my gen 2 4.0 MT now. There's very noticeable torque below 2000rpm too. In my everyday driving I like to shift between 2000 and 2500rpm. It's delivering there. I can't speak for others but that's a big deal for me.

 

Because that's what I wanted to figure out, the AT guys have the ECT button so you can spice it up if you want but us in the MT we have to find that happy medium since there's no button to switch it up on demand.

Did it help with the Rev hang?

 

It did help with the rev hang. You'd have to check with the tuner, but I think they can set it any way you would want it. With the MT I want my truck to have everything I need at the gas pedal, and my right foot can decide how I want to drive it. That's one of the things that makes MT's so much fun to drive.

 

If you still find the throttle a little bit touchy, please let your tuner know. We have options

As mentioned above, we have options. We have a wide variety of base throttle settings to suit just about anyone's needs/preferences. Be sure to try more than just one to ensure you're getting the one that fits you best.