Needs to be maintenance bled a lot to keep a firm pedal. As soon as I (and others) moved to a different fluid it all went away. With Endless I can do 10+ days without any maintenance bleeding. With RBF I would need to do it after every track event to keep the pedal firm.
Ecu tune is superior in every way. It actually has control of fueling, ignition timing, throttle mapping and 100's of other things that JB4 has no control over.
Most JB4 logs I have seen the timing curve looks like a wet noodle because the car is so pissed off. Fueling is way too lean for the...
If it has the recall done, it will need to be bench unlocked. You can either purchase the MHD unlocker, Mission unlocker, find a local tuner that can unlock it or send it somewhere to do it. *do not confuse this with FEMTO unlock that 21+ need to do*
You'll want a DP to make that power. GESI...
Several days? Zero worries unless something aftermarket is parasitic. These cars can sit a month+ with no issues.
The first year I had my Supra it sat for four months over the winter with no tender and it started right up.
650 ft/lb front
600 ft/lb rear (true coilover)
MCS 2 way Non-Remote dampers
Whiteline 24mm solid front sway bar
OEM rear sway bar
Verus UCW rear wing
Verus "low df" front splitter
Verus canards
I drive with my eyes closed on the track.