What kind of racing are you talking about?
Should I assume that you are talking about the quarter mile?
Seems that so many compare cars by the quarter mile, and end up judging the car primarily for that!
Supras were NOT primarily intended for the quarter mile.
The designers spent more time considering handling & road racing more than drag racing, than what US manufacturers consider.
Over here in the states, people are obsessed with drag racing.
We really have to open our eyes and realize that foreigners are more into road racing than we are, and design their cars more for that purpose.
I really don’t think it is fair at all to compare a car like a Supra to a Mustang because they were designed for different things.
It would be like comparing a Hayabusa to a road racer meant for the track, or a road racer to a dirt bike.
Just like for the Ferraris: they are not designed for drag racing, but for open roads.
Evaluating a Ferrari primarily on its drag performance is to not appreciate what the car was intended for!
Same goes for the Supra.
In my honest opinion for drag racing, I think that one would be best off getting a motor with more cylinders, more displacement, and modding that along with adding a twin turbos (one for each head of course).
You have to admit, a 6.6L car with twin turbos is going to produce enough torque to wheelie the car, if highly modded.
I just think that the best feature of the Supras (especially the MKIV!) is their ability to go though twisty roads, and unfortunately, many don't seem to appreciate its best feature