F-Sport IS350 ECU programming different?
This 2011 F-Sport IS350 doesn't shift to higher gears as early as my 2008 IS350 did. I clearly remember this.
With 2008 IS350, it shifts to 6th gear at around 40 mph or less.
When I take a corner it keeps me on higher gears so it loses a lot of power when I normally accelerate out of the corner. I would have to press the gas much harder to let the car shift down for more power, or use ECT mode, or use the paddle to set the top gear limiter.
With 2011 F-Sport IS350, it won't shift to 6th gear until I hit 50 mph. Even if I let off the gas (IIRC), it holds the gear in 5th.
When I take a corner it keeps me on lower gears so it won't lose much power when I need to accelerate back. As a result, it's more responsive even when I lightly tap on the gas. Every gears seem to hold longer. I get more control on the gas pedal. The 2008 model shifted way too soon in contrast. The 2011 F-Sport also puts me in 1st gear when I'm slowing down to 5~ 10 mph for the stop sign.
All this is with power setting set to Normal mode, no ECT for both vehicles.
And with both vehicles after completely warmed up.
It appears Lexus may have made changes to the ECU tuning for the either the 2011 or 2011 with F-Sport? I haven't tested this with non-F-Sport 2011 model so I don't know if it's the same way.
If so, I am really glad they did this, so I don't have to use top gear limiter as much using paddle shifter or shifter knob. The car also seems to take off smoother.
Also, I don't hear *whine* sound when accelerating (normal accelerations) like I did with 2008 IS350.
I just wanted to post up my experience with this.. Any comments, info, welcome.
'07 Lexus IS350 Lux pkg - Purchased at 135k miles
Last edited by Cheez; 11-07-2011 at 12:28 PM.