hey SE30,
how are you doing man? Well your inquiry is interesting, but I recently thought of an easy way to make the diablo tougher and able to hold more on such a power. First, why not swap its 5-gears gearbox with the murcielago's 6-gears ? it will fit in easily. This will help reach top speed of 400+km/h, and never run out of REVs. Second, giving in big air filters, and exhaust system will help the engine to breath in better, especially if you put the diablo GT's front bumper, you see how big the opening is? that is to let the car breathe the most air it can take on its way. Third, as I said before, think of the displacement, add more to the engine and its ready! What else does the car need, racing fuel, and slicks. What makes me sure that the diablo will be able to handle the 1.2 bars, is that I have seen a mitsubishi evolution tuned by Noris Design, it had 715 bhp from its 4 cylinder 2.2 litre @ 2.1 bars!!!! now thats crazy! So 1.2 bars will not be a problem for such a powerful engine like the diablo's. Well thats what I think of right now, but whenever I get new news I will send them to you.
See you around.