First of all your 240 has a speed sensor that'll cut you off somewhere between 115-130. If you've disconected the speed sensor to go faster than that your speedometer wont work, and your gagues cluster stops at 120. Even if you've found away around these problems it will be a really long race cuz 240's dont pull too hard on top end, I would know I have 2.
Im not trying to make you sound dumb Im just giving you the facts.
PS: Dont call me out my s14 got rearended last week and my s13 is going through some serious work right now.