OK a little explanation is required here...
As you may or may not know the "2JZ" engine as found in the Supra is of 3 litres in capacity. To get big power out of such an engine with that size of capacity requires a large turbocharger or turbochargers because smaller turbochargers can't flow the air to provide such large numbers.
With large turbochargers, if you don't have the capacity, you don't have the same amount of exhaust gases to spin the turbine, hence lack occurs.
This is why large capacity engines such as large diesels (i.e. 10+ litre) get away with using such large turbochargers and have small amounts of lag.
If you go sticking a large T88 or similar sized turbocharger on a 1 litre engine you will have major amounts of lag and will probably stuggle to spool it at all.
A perfect example were the BMW F1 cars of the 80's. They used 1.5 litre engines with simply massive turbochargers. On the courses with numerous bends, the cars were beaten with eases due to the lag, but on the courses with long straights they won easily.
In drag racing, as this Supra is designed for, these problems aren't such an issue, as the engine doesn't have to be overly responsive. With the auto box, high stall converter and big slicks, is it any suprose that it runs mid to low 8's.
As for the so called 'real' engineers...don't even go there.
I see no reason why it takes a six figure sum to create a car that can only muster 600 odd horsepower from such a supposedly advanced engine.
Dave
P.S. This is only my opinion, and no disrespect is intended!