Tacoma - OVTUNE - VFTUNER - Update Info and Original Development

Over 70,000 tuned miles. So if not the most, I’m close.

 

That dufus made it from 0-to-Ignore in record time.

 

I have not noticed this on the second set of files that were released. The first set of files with the 91 octane OL had LOTS of negative attributes that were quickly resolved.

 

I do concern, because I want to keep this truck until it's fall aparts.

 

You got me.. I’ve got 66k tuned miles on mine since March 2018

 

50k on an 16 AT (no tune)
100k on an 17 MT (tuned at 20k something)
20k on a 19 tundra

 

Dammit! I keep messing up that AT part. My bad!

 

Got my kit for the Labor Day sale in 2017. First tune was 1.03 in November

 

It was a lot of pain and suffering. People think 04b04 or the tune is bad, they should try 04b00...

I even got the update that went to 04b01 or 04b02. It was better but still bad.

Zero mods and it still drove me crazy.

traded it for the mt after 18 months which was night and day better.

 

For those concerned just give your truck the occasional Italian tune up.

Just sit above 4k RPM on the highway for a few minutes and should heat those valves right up

Honestly, I prefer keeping the tune as is when it comes to fueling.

 

Has anyone found the 'tip-in' too aggressive?

 

I keep meaning to test drive an AT just to know.

 

It’s easily adjustable in vf to your liking.

 

No.

 

Is there an OvTune Tundra forum..? I wonder if they're also wondering about direct injection stuff?

 

Even 04B03 was bad.....04B04 became tolerable.

 

The new ones are definitely better but the bar was set pretty low. The only time ever I saw 6th gear was downhill.

the craziest thing was I could average 20 mpg or 13 mpg depending on how the truck felt that day over the same route. Overall mpg is about 2 mpg less than my MT.

 

Seems like there are different philosophies when it comes to dual injection at a manufacturer level according to this post (linked below). I don’t think it’s as simple as saying one is right or wrong. The cold start and idle for my truck is much more improved on this tune and if that is a result of a different philosophy than what came stock, I’m all for it.

Source:
https://www.caranddriver.com/news/a...-engines-have-both-port-and-direct-injection/

The Combination

The ultimate strategy is combining both PI and DI benefits, using each to diminish the other’s negatives. Toyota, for example, fires both injectors during low to medium load and rpm conditions—in other words, during normal driving. This raises the density of the incoming charge without boosting and flushes carbon deposits off the intake valves. During high load and rpm circumstances, when maximum combustion chamber cooling is needed because detonation is more likely, DI handles all the fuel delivery.



Each maker uses a different strategy regarding when to use port, direct, or both injectors. One of Toyota’s torque versus rpm versus injector use maps is shown here.
Peter Dowding, Ford’s chief engineer of powertrain gasoline systems, revealed a different strategy. Ford uses PI alone at idle and at low rpm for smooth, quiet, and efficient engine operation. As rpm and load increase, fuel delivery becomes a programmed blend of PI and DI. In contrast to Toyota’s methodology, Ford’s PI is always operating, responsible for at least 5 to 10 percent of the fuel delivery.

Dowding and his Ford engineering colleague Stephen Russ stress that carbon deposits on tailpipes and intake valves have never been an issue in their DI engines. Dowding adds: “Now that electric motors are being assigned increasing propulsion roles, our task is to improve engine efficiency whenever we can. Ford’s dual-fuel technology has already proven to be a valuable, cost-effective strategy in this effort.”

 

Similar with 04B12 to 04B13.

 

There’s a thread on tundras.