This is not that tough. All forced induction does is raise the pressure in the cylinder by forcing more air and fuel in. The more air and fuel you have in the cylinder the bigger the bang, the more power.

The problem is that if you put fuel and air under pressure then the temperature at which they explode gets lower. Too much pressure or too much air and fuel and the explosion happens before the sparkplug fires and while the piston is still moving up the cylinder. This is called preignition or pinging. It is very bad. When it happens many things could go wrong. You will lose power; you might snap a connecting rod; blow out a ring or a seal; crack the block; etc, etc ,etc.

So when you turbocharge or supercharge an engine you must limit boost pressure so that the amount of pressure plus the engine's compression ratio does not lead to preignition.

The problem with turbo or supercharging the ITR is that the ITR already has a high compression ratio. So you must keep the boost pressure pretty low to avoid preignition. So the gains in HP and Torque that you will get are not nearly what you would get form a lower compression motor (like the GSR or RS or LS).

To make an ITR a good candidate for forced induction would require making the motor stronger (rods bearings gaskets ) and/or putting in lower compression pistons.

So, you could put FI on an ITR motor but it would not give nearly as good bang for the buck as putting FI on an LS motor. Most ITR lovers think its a waste of a carefully engineered motor to "spoil" it in this way.

Regards,
Alan