I used to drive a track prepped NA (first gen), Miata with 300 rwhp. Partial roll cage. Motor was a 1.8L swapped from a newer Miata, but built from scratch with forged con rods, custom forged pistons, O-ringed block/head and running 15 psi of boost with a custom turbo kit. Motor was built to handle 20 lbs of boost, but run at 15 for longevity. Tons of ceramic coatings, polymer coatings for oil release and hard coat lube coatings, etc. Upgraded nearly every system. Swapped diff gears and trans 5th gear from a RX7 even. An honest 165 mph car and very, very quick. A hoot at the track, dangerous on the street. Sold it after 9 years to buy a house. Did a dyno day once and the boost controller took a dump, spiked over 30 psi and was generating 500 ft/lbs of torque momentarily while skipping the tires on the rollers.
Ahh, the old days. When my noggin was full of odd bits of Miata and Mazda info like all the paint codes and interchangeable parts between later Kias. I've possibly forgotten more than most will ever know about those little cars.