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

because you can advance timing more on higher octane to overcome the "resistance to detonation" and possibly make more power.

Ill be very interested to see what dyno charts look like on this motor, if it puts down the numbers they claim and has a VERY broad torque curve, more so than the 1GR its going to be a WINNING motor.

 

That's why only an engine whose fuel injection and ignition timing strategies can react to whatever feedback gathered by the knock sensor can benefit from using fuels of different octane ratings. For some cars that are tuned strictly to run 87 octane, putting 91 or higher in the tank would be a waste of money. For a car where the manufacturer recommends premium fuel but not required, this is when running 91 may gain better performance or fuel economy compared to running 87, especially in hot summer days.

FYI, the higher the octane rating, the higher resistance to detonation (which was true as what you just said), which means the ignition timing can be advanced (prior to the TDC of the power stroke out of the 4 strokes) that results in more power. The ignition timing is programmed such that it will always advance as much as possible until the knock sensor senses knocking/pinging, which will then either halt the timing advance any further, or cut back the advance (aka retard the timing). All of these actions are constantly being relayed and communicated back and forth with the ECU/PCM to compare with fuel trim strategies as well as other mappings/data for more on-the-fly adjustments.

 

I'm more likely to believe that the power and torque figures given are under the Atkinson-cycle, since that is how Toyota is marketing this engine as. I think this new engine runs on Atkinson-cycle almost all of the time, until higher load (based on crank speed, throttle-angle, etc) or wide-open-throttle input is detected which will then command the VVT-iW intake cam to cut back on the post-BDC angle at the beginning of the compression stroke, thus minimizing the Atkinson effect of scavenging the fuel-air mixture back into the intake runners.

 

Can this engine run E85? similar engine to frs and it can. Would be fun if this engine could add 40-50 hp and 30 tq with headers intake and tune like the frs.

 

Why the eff would anyone willingly put E85 in their vehicle?

 

Cause it rips, and newer engines that can run it don't have issues. it would just be a tank every once and a while for me. Was the colorados numbers on regular or premium?

 

Flex fuel sensors come with the e85 tune frs/brz

 

Use 2 bottles of octane boost to get 33 additional HP.

 

I don't think the GS350 is using the 2GR-FKS. I believe it is a tweaked 2GR-FSE.

 

Only the best for your whip

 

The current GS 350 still uses 2GR-FSE. The 2016 model will switch over to 2GR-FKS.

Read the press release (I provided the link in the 1st post), it says right in there "2GR-FKS".

 

The 2GR-FKS is a tweaked 2GR-FSE. The only difference is the FKE can switch between Atkinson cycle and Otto cycle while the FSE is strictly Otto cycle. This is why I wouldn't be surprised if the Tacoma can net around 300hp with 91/93 octane.

 

Sooo I'm a little late to this but are you guys saying the 1GR-FE is actually doing better with 91 or higher octane?

 

FYI, for those that are interested. Toyota ECU for the 3S-GTE Turbo (90-99 MR2). Not new technology.

 

Interestingly, the specs for the 2GR in the Tacoma (278/265) list it as using 91 octane fuel.

Jeff

 

Looking closer, it looks like it was 91 RON, so it should actually be 87 R+M/2 for the Tacoma, not premium.

Jeff

 

Less so for the single VVT-i engine, and more so for the dual VVT-i engine that Tacomas don't get.

I have yet to try it on the FJ with higher octane fuel, but it's been told that you can gain roughly 20 horsepower and 20 torque using 91 octane, and this is without VVT-iW or D-4S tech.

 

No shit. I didn't see that. Odd that they left the 2GR-FSE in the IS350 and put the 2GR-FKS in the GS350. They are certainly very different engines based on my source (side by side you wouldn't confuse the two according to my source). I wonder if the IS300 is getting a 2GR-FKS or a detuned 2GR-FSE...

Tacoma is getting a Lexus car motor! :lol: