How much do you think the car weighs? Dynamics and gravity isn't all that matters. Your power curve and gearing have alot to do with it as well. If a car is 3000lb(with driver) it takes 450rwhp to break 10s with slicks or possibly drag radials. Only weight reduction most RX7 guys do is drop the air pump, power steering and lighter exhaust and wheels. Not too much usually. Some harder core guys get rid of the ac(not me in FL ), interior items(or all of it), take bumper supports off, etc. We're both talking rear wheel HP, right?

What hurts the supras I think, is the fact that they only get their peak horsepower at like the last few hundred RPMs or so.