Tacoma - OVTUNE - VFTUNER - Update Info and Original Development

Vlady · Mar 2, 2019

@OVTune,
Mat, could you please shed some light on TC locking/unlocking algorithm in ECU?
Wondering if there is a room for improvement to prevent "slippage/jeeking" feeling at certain conditions.
I see this during TC locked in 4,5,6 gears with engine calc. load around 85% and RPMs in 1200-1300 range. These is a way to exit from the condition, but it requires some effor to either push the pedal further down or let it go and push again.
Can we make ECU to unlock TC or whatever appropriate to make somewhat seemless?
I suspect it may be related to changes to improve 5,6 gears holding.
1.05 87 base
Thanks

Roddy13 · Mar 2, 2019

OVTune[OP] said: ↑

So. Dyno testing today went well.
More pictures, and such as we explain further this weekend.
First post has been updated.

Truck testing : 100% Bone stock 2017 Tacoma long bed. No modifications. Stock Tires.

Testing included :
- Stock ECU 04B03 (PRE TSB File)
- STOCK ECU TSB 04B04 ( after seeing this nobody should be on the fence about updating to TSB, even if you're uninterested in tuning )
- Tuned 04B04 Performance version 87 octane
(93 octane testing will commence tomorrow)
- Acoustic Valve Control Tuning - Optimal Torque point.

(when comparing these results to our test truck, please understand our test truck was tested under Dyno Dynamics wheel measure non shootout mode, which reads considerably lower.)
These numbers are still accurate and what is expected on a Dyno Jet. NO dyno settings were modified.

Our Goal: Ensure we can provide the absolute BEST calibration for these trucks possible, even under strict octane requirements. More and more people want performance without paying at the pump. So we sought out to ensure that you are losing nothing by running 87 octane.

First we began with running 04B03 stock, vs 04B04 Stock.
We set the truck up on the dyno, and ran 04B03.
Immediately after we updated the ECU to Toyotas TSB ECU version 04B04 through techstream.
- The truck immediately picked up a noticeable amount of low end torque and a positive gain or +6 horsepower over 04B03 stock. (note, no changes except updating to 04B04)

Next we sought out to tune the Acoustic Valve control. We all know that sudden "surge" in power about half way through the RPM band. Well this is the Acoustic Valve control activation.
The ACIS has a 2 phase point, and has more than 1 RPM activation point depending on "low and High" opening / activation.

First we began by testing some slight RPM adjustments, and were able to eliminate the torque hole where the stock activation takes place.

Through further adjustments we were able to create a torque spike, but this is from a surge in manifold turbulence and you can see the resulting slope and recover afterwards. Not really ideal for tuning or driving.

Finally after multiple tests we found the most IDEAL location (which is NOT stock) to create more torque in the lower RPM while reducing the torque slope after activation.
You can see below, and we further smoothed this through changes to intake valve timing (which does NOT reduce any torque)

Finally, our resulting changes.
-04B04 Performance 87 octane with the new ACIS tuned point

This is a tuned gain with 87 octane that will provide real world results where the truck is driven and needed the most.
Include gear locking, and you've got more than 50 ft lbs available at 3100 RPM, tested. This is an absolute requirement for anyone who would like to tow WITHOUT having the engine screaming at 5000 RPM.
(for people who are already on 04B04, testing results ~20-22 ft lbs)

Final result:

Note-

This is our 87 octane performance tune vs 87 octane stock tune.
We get MANY requests about people wanting as much power and response while remaining on 87 octane, so we thought it would be best to give this octane the attention people are requesting.
As a result we are seeing VERY good gains for 87 octane.
Through tuning the intake manifold, modifying valve timing to create more torque where more flow is now available via intake manifold runner tuning, we have created even more torque in the low end than EVER before, on 87 octane.

Results below are how the truck came in (04B03 pre -TSB) To UPDATED 04B04 Tuned 87 octane. This is a massive difference.
Now the engine is making more than 250 Horsepower, measured at the wheel, from 5200 RPM to 7000 RPM.

Through extensive testing, and months of development we have found, tested, and ensured we can continue to provide the absolute best, unmatched, calibration for these trucks possible.
This includes development and testing for things that we had listed to do outside of our 1.05 release,
- Acoustic Valve Tuning
- Additional Intake and Exhaust Valve tuning to match new ACIS tuned points
- Focusing on improving our 87 octane tune
- Lower RPM torque gains are made NOT through ANY ignition or fueling changes. ONLY through modifications to throttle, torque, and shift limitations.

Click to expand...

This should be a new thread now Matt and stickied.

I check this thread often and missed this post with peoples postings

riz_atx · Mar 2, 2019

Roddy13 said: ↑

This should be a new thread now Matt and stickied.

I check this thread often and missed this post with peoples postings
Click to expand...

https://www.tacomaworld.com/search/7865185/

That shows all OVTune posts. Or you could hit the arrows in his posts. Or you could search just for his posts.

Shellshock · Mar 2, 2019

Roddy13 said: ↑

This should be a new thread now Matt and stickied.

I check this thread often and missed this post with peoples postings
Click to expand...

New thread won’t happen. Just use the search box

jaredc2306 · Mar 2, 2019

My truck is at the dealership getting some maintenance done so I can't quickly get the answer I need just by plugging in and reading the ecu, so I figure I'll just ask here while I wait. I want to get Techstream setup while I wait at home but I am not sure I need it. I had the TSB0125-18 done back in October. Does this TSB change me to an 04B04? The drop down menu for the 2016 only has 04B02 on the FM.

siKjiTz · Mar 2, 2019

I’m getting this error message. Anyone know what I am doing wrong? I ran the p5flash software, clicked flash it, selected my file and then this pops up. Please advise.

GoldenBrew · Mar 2, 2019

jaredc2306 said: ↑

My truck is at the dealership getting some maintenance done so I can't quickly get the answer I need just by plugging in and reading the ecu, so I figure I'll just ask here while I wait. I want to get Techstream setup while I wait at home but I am not sure I need it. I had the TSB0125-18 done back in October. Does this TSB change me to an 04B04? The drop down menu for the 2016 only has 04B02 on the FM.
Click to expand...

If you got the -18 tsb you should be on 04b04 which will be in the '17 year - use that drop down.

OriginalMan · Mar 2, 2019

Vlady said: ↑

@OVTune,
Mat, could you please shed some light on TC locking/unlocking algorithm in ECU?
Wondering if there is a room for improvement to prevent "slippage/jeeking" feeling at certain conditions.
I see this during TC locked in 4,5,6 gears with engine calc. load around 85% and RPMs in 1200-1300 range. These is a way to exit from the condition, but it requires some effor to either push the pedal further down or let it go and push again.
Can we make ECU to unlock TC or whatever appropriate to make somewhat seemless?
I suspect it may be related to changes to improve 5,6 gears holding.
1.05 87 base
Thanks
Click to expand...

Send a ticket via zendesk.

OVTune · Mar 2, 2019

Roddy13 said: ↑

This should be a new thread now Matt and stickied.

I check this thread often and missed this post with peoples postings
Click to expand...

it's in the first post

jaredc2306 · Mar 2, 2019

GoldenBrew said: ↑

If you got the -18 tsb you should be on 04b04 which will be in the '17 year - use that drop down.
Click to expand...

Awesome. Thank you! I downloaded the wrong tunes then.

idahotornado · Mar 2, 2019

Held my breath and updated my ECU from 04B03 to 04B04. I was able to find all the info by searching.

Then immediately flashed 1.0.5 91 Gearlock. Not enough miles for a review but thrilled so far! I think the tip-in is perfect! Feels very similar to the 350z I had so no issues from me.

Shellshock · Mar 2, 2019

idahotornado said: ↑

Held my breath and updated my ECU from 04B03 to 04B04. I was able to find all the info by searching.

Then immediately flashed 1.0.5 91 Gearlock. Not enough miles for a review but thrilled so far! I think the tip-in is perfect! Feels very similar to the 350z I had so no issues from me.
Click to expand...

MOC221_ · Mar 2, 2019

Shellshock said: ↑

Click to expand...

You have the patience of a saint.

Try not to fall down the well too far brother

Deucer01 · Mar 2, 2019

Frito said: ↑

This is the one that tells me there is a Virus attached.... I guess if the "virus" is blocked I get an incomplete download and therefore the root of my troubles ?

But, what of this virus ??

What is RDN/Generic.rp Virus?

RDN/Generic.rp is newly found as system virus detected as Trojan Virus. This vicious computer malware is a very big risk for all Windows OS computers system. It may smoothly insert your PC without your knowing and perform severe damaging activities in your machine. It may also block your anti-virus software and windows firewall program to stay safe for a long time in to your PC. It may slow down your system speed and causes sluggish performance. You may detect it very difficult to do any task on your system. Most of the system programs may keep freezing and often fail to work. RDN/Generic.rp may totally degrade your system speed and leads to serious problems.

worked for me. Follow step by step instructions in above link. The .cuw file will work with this version.
Click to expand...

I didn't get that warning.

wjrichardson · Mar 2, 2019

idahotornado said: ↑

Held my breath and updated my ECU from 04B03 to 04B04. I was able to find all the info by searching.

Then immediately flashed 1.0.5 91 Gearlock. Not enough miles for a review but thrilled so far! I think the tip-in is perfect! Feels very similar to the 350z I had so no issues from me.
Click to expand...

I have tech stream downloaded and the app runs. I can connect to the truck but what is the process for updating the ECU? I couldn't figure it out after a few minutes of stabbing around.

Deucer01 · Mar 2, 2019

Roddy13 said: ↑

This should be a new thread now Matt and stickied.

I check this thread often and missed this post with peoples postings
Click to expand...

It's in his first post.

Deucer01 · Mar 2, 2019

wjrichardson said: ↑

I have tech stream downloaded and the app runs. I can connect to the truck but what is the process for updating the ECU? I couldn't figure it out after a few minutes of stabbing around.
Click to expand...

Search this thread. It's been posted a couple times in the last few pages.

KrnTaco08 · Mar 2, 2019

Can I use my macbook to download and flash the OVtune? Or do I need a Windows computer? Thx

Shellshock · Mar 2, 2019

wjrichardson said: ↑

I have tech stream downloaded and the app runs. I can connect to the truck but what is the process for updating the ECU? I couldn't figure it out after a few minutes of stabbing around.
Click to expand...

https://www.tacomaworld.com/posts/18467047

Download the cuw files. Connect to truck. Run cuw file and follow directions. Super easy

Shellshock · Mar 2, 2019

KrnTaco08 said: ↑

Can I use my macbook to download and flash the OVtune? Or do I need a Windows computer? Thx
Click to expand...

Just setup boot camp on the macbook. That’s what I did

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