Hmm... this board definately isnt big enough for two Dereks with 93 manual 240s...
Anyways... the two limiters you will hit in a 240... will be the gear limiter and the speed limiter. The gear limiter limits you to 5000rpm in 4th and 5th... to get rid of this, you jsut have to trick the car into thinking your never in 4th or 5th
The Speed limiter might only be on autos, as ive never hit it on mine... but ive never actually tried to hit it... ive burried the needle quite a few times... but ive slowed down soon after since either my wheels or drive shaft are getting out of balance, and the car shakes quite a bit at those speeds.
To disable the gear limiters cut or unplug the 4th and 5th gear sensors (Top and OD position). They will be the two middle sensors on the passenger side of the transmission. Heres a visual for ya: