My previous car was an '06 Lexus IS350, and it had DBW. When I was tuning it via a custom piggy-back, I noticed in the datalogs that the throttle plate had a variable mapping to the throttle pedal based on RPM. Basically, at WOT, the throttle plate would open up to 100% for most of the RPM range, but in the middle of the RPM range, it would slowly close a bit (maybe to 90%), then it would slowly open back up again to 100%. I believe this was something that Lexus implimented due to some resonance characteristics with the intake.

Does anyone know if the S2000 does the same, or if it might benefit from the same? I see that the throttle pedal mapping table can be altered to achieve this same type of response.

 

I think it stays at a hundred or 102 but I'll check it out.
I've been playing with the throttle plate map, making it less sensitive near zero and still have a bit of tweaking to do.

 

I totally forgot that I have a datalog from my brother's totally stock '06. I see that TPlate does not change like it did on my Lexus.

I wish I had access to a dyno so that I could try different throttle levels (95%, 90%, etc.) to see if torque goes up anywhere in the RPM range.