Modern vs. Old School

Someone mentioned a BMW E30 M3 In this thread. I had one for 4 years and it was one hell of a car. The first M3 was the E30 and came to the US in the late 80s at a msrp of $35,000. It had a 200 hp, 2.3ltr, 16 valve chain driven inline 4 banger with 4, 46 mm throttle bodies, 4 into 2 header with X-pipe, 2 cats and a single dual in, dual out straight through muffler. 11” 4 wheel disks with ABS, 5 speed only, 4.10 lsd rear, 7200 rev limit (7800 with chip). All at only 2750lbs. With the big bore, short stroke combo the car didn’t have much torque and ran the 1/4 in low 15s, high 14s @ 90+ MPH.....But once on I84 with my girlfriend behind the wheel (she was from Europe, hairy pits and all) we did 30 miles at a sustained speed of 140 mph. At 60 mph the car got 33 mpg. All this in stock form, not bad for an 80s car.

The engine is called an S14 and was made to fit into the strict european touring car rules. A stock rebuild on a S14 runs $7,000. A tune up (cap, plugs, wires, rotor) costs $500.

What would it take to get the car into the 13s? In short, $20,000.