3rd Gen Tacoma 2.7L ECU Tuning

Tuning a stock motor and especially this one??? I call snake oil until I see dyno charts to prove me right. This 2trfe has been around for ages and you think you can tune it better than toyotas engineers?? They already squeezed all the power out of it so unless you supercharge or turbo there's nothing to tune, any gains would equal losses elsewhere.

 

Will this type of tune dial out rev-hang? I am used to it by now, and although it isn't that bad compared to some other cars, I would like to see a linear throttle map to compare to stock.

(I've seen those plug-in throttle box things, but I'm not sure if those actually eliminate hang or just adjust pedal sensitivity. Plus, I'm a little less comfortable with that type of interference solution than I would be with a "real" tune, but I also barely know what I'm talking about, so... yeah).

 

That engine is bulletproof because it it severely de-tuned. So yes they will be able no problem to tune it better, but you will need a freer flowing intake and freer flowing exhaust, and the MPG will go down period. Car engines are tuned for emissions and fuel economy not performance. So a tune alone will have very small improvements, specifically throttle behavior. But to take full advantage, the intake and exhaust have to be modified as well.

Lowering the peak torque RPM will be the biggest change. It might see about a 10% increase in HP id the intake and exhaust were also modified. With the tune alone maybe 2%.

 

You don't know what you are talking about. This stock air box flows extremely well which is why URD recommends to keep it when installing their supercharger. If that's not enough for you Toyota also uses the same airbox in the V8 4Runner.
And a bigger exhaust isn't gonna help you either (unless forced induction) because these little engines need back pressure for low end torque (that's why I said any gains = losses elsewhere). That said I'm open to accept your dyno charts as contra proof but no more Wikipedia wisdom plz

 

Back pressure being beneficial is a misconception. Exhaust tuning is about optimizing the flow of gasses, mainly the velocity, within the system.

Too much volume within the system causes turbulence, reducing the velocity and netting a performance loss.

Too little volume within the system causes restriction (back pressure), again reducing the velocity and netting a performance loss.



Within the context of these trucks though, and for street vehicles in general, the OEMs will design exhaust systems (among other systems) for daily driving purposes: partial throttle, constant changes in revs, comfort (noise levels), etc. This is obviously different and more nuanced than throwing a vehicle on a dynamometer and going for gold, spitting out the highest WOT number. Most customers won't be using their vehicle at 10/10ths 100% of the time.

In the end, we get the "best" compromise when is comes to the engine's efficiency, powerband, and lifespan, so that it will work well under the majority of circumstances and for a long time.

 

It would be nice if they could alter the 2500 rpms rev it does for 30 seconds when I crank mine up

 

That's to heat up that cats for emissions purposes. Does it really bother you that much?

 

When its cold outside it annoys me seeing it rev that high as soon as it fires off. I like to let the oil warm up and flow better before I take off if it's below freezing outside.

 

That's why it's only 2500. That won't hurt nothing. And there's no point letting it idle in the cold. That's wisdom from before efi.
Just don't romp on it for the first 10-15 minutes

 

Even if there isn’t any significant power gains, an increase in drive ability would be nice. I want there to be no delay between pressing the gas and the engine reving. The 3rd gen sucks in this regard.

 

Best response ever!!

 

Aren't RAV4 lighter vehicles.

 

I don't really notice a "delay" so much as a "damping" or "smoothing" effect going on coupled with overzealous upshifting. Which I guess is just arguing semantics really because the result is almost the same.

I was busy as hell a week ago moving across town. It was a short trip but the return required a merge onto a highway on an uphill ramp. More often than not it would just sort of lazily lug itself up like it couldn't be bothered. Kick your boot into its ass and it would rocket up that thing, but with "regular guy" driving it just wants to upshift way too early and damp the throttle input.

The 4 banger has got the power, I have felt the acceleration and passing power that it can put down with a little more aggressive throttle inputs and I think to myself "this is nice," but I wish I could see it more often!

 

I tow a small utility trail or with 1 mower and few added things to it. My truck pulls extremely well for a 2.7l. Never would I think it would pull this well. I get better mpg pulling the trailer than when I use a 2013 f-150 v8. I'm just a suck for extra power and would kill to have a little more throttle response and other things that this tune will be able to do. Have a feeling though that it's going to be costly.

 

I was really hoping this would catch more traction! @OVTune is this getting done regardless, or only if there is enough interest?

 

If its not getting done, can anyone tell me the model of the ECM in these trucks, I might have to find a way to modify it myself hah

 

We have been beyond packed with work with the 3.5L, but now that we are finally complete with all AT version 1.02C shift maps, we just need to wrap up MT and we're good to go. Sorry to keep everyone waiting.

 

Looking forward to it!

 

AWW YES. Just wondering, what are the maps looking like for the 3.5? How much gain were you guys able to squeeze using 93 octane?

 

So how much power have you squeezed out of the 2.7 so far?