2GR-FKS on 91 octane: 311hp@6400rpm and 280lb-ft@4800rpm

Now I don't know if this 91 octane tune is available on the new Tacoma engine, but apparently the same engine is going into the 2016 Lexus GS 350 (and probably the new RX 350).

Just found a new entry under 2GR-FKS sub-topic on the GR engine wiki page, but the source seems to be legit this time (straight from Lexus press release).

https://en.wikipedia.org/wiki/Toyota_GR_engine#2GR-FKS

Lexus GS press release can be downloaded from this page
http://pressroom.toyota.com/article_display.cfm?article_id=5183

 

I don't want that much horsepower. The V6 in the Tacoma is better

 

Toyota probably just limits the rpm horsepower and torque for reliability purposes. Just a change in software and you could very well get those numbers on premium. Everything else about it just being the corporate 3.5 with the Lexus line add ons has proven to be true. After all, the 4.0 has the same bore from what I have read and is essentially a long stroke version of the 3.5 . They are all in the same family.
https://en.m.wikipedia.org/wiki/Toyota_GR_engine

 

D4-S engines generally have a very high compression ratio and react very well to increased octane. Pretty much most modern engines have at least two maps (low octane and high octane). Most companies don't want their cars/trucks to be 91 octane recommended so they dyno at 87 octane.

I would not be surprised if the 2016 Tacoma has a "high octane" map and posts similar numbers with 91/93 octane.

 

The 1GR did in fact make more power on 91/93. It even states it in the owners manual

 

Wait, so it is minivan / car engine ? Otherwise why would you think car engine specs would apply to truck engine ...

 

^This. It takes time to adjust to the octane.

Most companies have a high and low octane tune. Toyota generally does. The 2GR will react even better to high octane and the 1GR.

 

Don't use wiki

You might be right but most of the time, newer model cars with have multiple timing maps; at least a high/low octane map. It takes a while for the ECU to adjust so you won't notice an immediate difference and generally the difference was at higher RPM's so you didn't notice it when daily driving...

Direct injection engines benefit a lot with higher octane gas. Generally timing is tuned way do to accommodate lower octane gas in order to make it more appealing to buyers.

 

Sorry that's a different engine, it may pull harder with better gas but your not getting 30 hp from any gas and a factory tune..... I wish it would be that easy... But with some aftermarket tuning it should be close to that.... You can unlock about 20-30 hp with these V6 Toyotas..... Hopefully that will be true on the new engine...

 

Def false, it does make more power with higher octane, its been that way since 2005.

 

Go on.........

 

-Yes, there is generally a high and low octane map. ECU can "learn" as well
-I don't know what an octane sensor is but that's not how ECU's detect octane. The ping sensor detects all detonation and the ECU can map the detonation timing to the piston position (using crank sensor inputs) and determine if detonation is advancing or retarding. At certain trip points, it will change its octane map. At other trip points, it will cut all timing due to pinging.
-The FSE has almost a 12:1 compression ratio. 91 octane can easily make 30hp over 87. The port injection is used simultaneously with the DI for low and mid engine speeds to help atomize the fuel air mixture. The port injectors also help with emissions.

 

https://youtu.be/LltM2fgWaXw

 

Hey, I found this info and was just sharing with fellow TWers. This thread can serve as a good discussion thread about the new engine if you try to at least act like an adult by cutting back on the trolling/snarking.

 

True about the knock sensor advancing or pulling ignition timing depending on the whatever the fuel's octane will allow prior to preignition/detonation.

Let's see if any new Tacoma owner is planning to do some dyno runs to compare power and torque when running different octane fuels.

 

We should call him BlueTroll.

 

Need more info on the Tacoma engine and the GS engine, to see if there are any physical differences among the engine block and components. If not, then this may well be just a tune difference.

They actually do tune an engine for different octane levels, but they usually do it backwards, where they'll tune for premium 91 octane which is usually recommended or required for high performance engines, and then tune for 87 for pulling back ignition timing and such if the owner has no choice but to use 87 temporarily.

In the case of the Tacoma's engine, it's most likely tuned for 87 octane, but the tuning might accommodate more timing advance in the presence of higher octane fuel until the knock sensor senses knock to halt further timing advances.

Another thing that I wish we have more info on is whether the rated horsepower and torque figures derived from running strictly Atkinson-cycle? If the engine can in fact instantaneously switch over to Otto-cycle with VVT-iW, then I'm very curious as to the actual power and torque curves when running in Otto-cycle, which means you sacrifice fuel-efficiency for performance.

 

Don't be a nimby. Google it. I don't know about any dyno but I know the ECU is much more careful and much slower to advance timing for higher octane fuel and very quick to pull timing for lower octane fuel.

This.

Before the trolls run out, Im not disagreeing, Im just saying its quite possible

 

No problem, all these are really just conjectures at this point. Probably a good thing to bring up in case some people who are curious but with the resources to find out can actually go find out for the rest of us. Unless Toyota is willing to spill the beans, but they might not be so willing to divulge corporate IPs such as engine tuning strategies.