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Discussion Starter · #1 ·
I'm sure it's a little early in the life cycle of the CT is ask this, but I wonder if or when someone has looked into modifying/reprogramming some of the behavior of the car's control system. Using a handheld programmer and "tunes" accessed via the cars ODB port.

For example, I would really like to raise the speed at which the EV MODE disengages from 25 mph to 30 mph. I would find this very useful for residential driving at 25-30mph. I like the add'l battery only powered acceleration EV MODE allows, but could use a little more "top end" in EV MODE.

Maybe the electrical output of the electric motor can be further enhanced in SPORT mode to say a 750W boost over the 600W currently?

Maybe EV acceleration in other modes can exceed north of the ECO level on that left gauge?

Clearly these types of mods would never be Lexus/dealership approved, however, in the world of auto modification we tend to find some limits to push to get that additional performance. As we all know, manufactures typically leave some performance (horsepower or battery output) on the table in the name of efficiency, warranty, or in this case battery longevity, etc.

Just curious if the control system programming CAN be modified, with the hopes to enhance the battery performance down the road. Just think if someone can come up with an auxiliary, Li battery pack that say is a drop in replacement for all that space occupied by the spare tire and that styrofoam organizer thingy?!?:eek:
 

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Discussion Starter · #3 ·
Interesting.... In no way shape or form will my CT stay in EV MODE if going over 25mph. Sounds like this is a programmable set point in the control system. Now we just need to find a way to change it. :cool:

Now I CAN keep the EV light on (ICE off) up to 45 mph in the other modes, if like you say, I accelerate very slowly, keeping the needle at or below ECO on the left gauge.

But I like the greater acceleration EV MODE allows. I guess I can turn on EV MODE when starting from a stop, accelerate up to 25mph (at which point the car will automatically disengage EV MODE), then back off the "throttle" to keep the ECO gauge below ECO, and continue to gradually accelerate/drive in another mode while trying to keep the ICE from firing up. Of course all this only lasts for a mile or so until the battery is drained..... hmmm, yeah, need more battery capacity.;)
 
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