2016 OVTune Tacoma 3.5L Manual Transmission / Engine ECU Reflash

No reported issues so far with my truck running the 91+ on a 0411B.

 

Throttle response is good. I may just put a few more km's on the truck to see if it smartens up. I have only gone 120km's with this tune

 

I’d be ok with it toned back just a hair. It’s a little touchy for my liking on the snow and ice - I’d assume the same for when people hit the dirt.

 

Yeah I wondered about that, 3 second intervals is an eternity. I will try a bare minimum set and see it that helps.

 

Just my opinion, but the throttle response itself is not too twitchy in my case.

WRT these stutters, it seems that some (including me) have more pronounced surges when cold. You stated in the DEV thread that changes were made to 1.03 (the A/T version at least) to improve performance in line with engine temperature. Would it be a big deal to remove that feature (since it's new), and have some peeps test a file without that?

Just throwin ideas around until dyno day.

 

Would dialing the throttle back to a stock like curve without the throttle limit with the improved ignition provide a better response than stock? Eliminate the scary bog when trying to take off at low rpm. I tend to carefully modulate the throttle to maximize traction and cornering response. I have tried using more aggressive throttle maps in the past when road racing and it becomes too much of a chore to modulate properly. Yeah, I know I have a truck but habits die hard

 

I’d give this tune some time gentlemen. I’d say run this tune for 500-1K miles and see how things feel then.

 

after hearing you guys report this I did some testing on my truck today, tried to get as much data as possible from 1200-2500 RPM with the torque converter locked up so I can get good data.

it's not injection timing, it's camshaft timing, right around 15-18% throttle 1900ish RPM I am able to produce it on my truck regardless of temperature.
I tested same lock but with completely stock camshaft timing and can still produce it.
it's the transition of valve timing as the exhaust cam advances and the intake cam retards.
from what I see it is when the intake camshaft is around 20-23*, but not when lower at under 20 to 10*, or over 30*

this area on the camshaft map I have not changed from stock on the tunes.

 

AHA! So what do you think can be done?

 

I'll have to tune this area of the valve timing..

you can see here under peak retard it is OK, but the transition range around 20* on the intake there is ignition instability, likely pre-ignition

it's an area of the map I've never changed...
this might explain why some of you have said you have stutters since you've owned the truck even on stock tune.

 

Those ragged waveforms look like my trucks feels. Damn stutters lol. Otherwise I love 1.03B, especially the 91 file. Power.

Thanks for looking into this Mat

 

I second this. Well minus the 91 file cuz i haven’t tried it. I feel like 91 would result in me getting a ticket. I’ve noticed with the new 87 tune I tend to be going faster than before cuz it just keeps pulling and I don’t notice

 

Glad to hear you found the issue. I've been considering flashing back to the older version, since this release just feels off from 2K-3K, which is where
I spend a lot of my commute. I never noticed the issue when I was stock, or, like I said, with the previous version of your tune. I'm wondering
of the additional torque in that range makes the pre-ignition much more noticeable to the driver?

 

Run it, it's unlikely you will have an issue. If you do feel something it will probably be very slight so give it a week then judge for yourself. Your not going to hurt anything trying it out.

 

for the MT I can't say for sure without some more data, but for the AT it's because getting to this are of valve timing targets is very difficult

 

What app do you use and why (just out of curiosity) What PID's do you log?

 

I know some have said that there is no/very little difference between the 87 and 91 tunes. Well, I ran 91 first and am on 87 now (still 91 in the tank) to try and rule out some things with my stutter issue. I can tell you that while the 87 tune feels significantly better than stock, the 91 tune just pulls HARDER. Off idle to about 2000 it's not a ground breaking difference, but once you get above that and up into this engine's power band it just takes off. If you look at the dyno results, you can see the torque keeps increasing past the stock peak at 4600 all the way up to about 5200 tuned... and you ain't gonna get gains such as those without more aggressive ignition advance, which isn't possible with lower octane fuel (detonation, anyone)- remember, the dyno pulls were done on 91 or better fuel.

All I can say is when I changed to the 87 tune the truck felt muted compared to 91.

Try it and see

 

Well unfortunately, I haven't found any other app that has up to date Toyota PIDs. I use to like DashCommand, but those guys have totally dropped the ball with regards to PID libraries newer than about 2014. Torque also doesn't appear to have an extensive PID library for Toyota. I was mostly interested in cam timing, injector duty cycles and what not that I could use to monitor Atkinson operation and the D4S port/Direct transitions. OBD fusion has the injection mode, but the injector duty cycle PIDs report bogus data. Likewise, the MAP is also bogus and shows pressures all over the place.

I'm still looking for a good App really.

 

I’ll probably try it at some point once the snow is gone. Don’t need any more power to slide off the road lol

I’ll be doing quite a bit of towing once the weather warms up so I’d be curious to see how much of a difference it makes

 

Ya, I'm pretty sure I am going to run 1.03b on the 87 tune just as soon as I get my dongle activation key from Matt. I also plan on driving normal for the first 50-100 miles to let the new tune get a baseline. Not sure if that will change anything, but worth a try I guess.

Hey @OVTune, what log data helps you? I would be willing to log my data after flash and send it to you if that helps, just let me know what PID's to log. (I use OBD Fusion app) @MOC221_ helped set me up a bit with it, but if there are other specific data points that help you, let me know.