In a naturally-aspirated state (without a turbocharger) the Miata’s inline-four runs optimally with a 2.25” diameter exhaust installed. A larger diameter exhaust won’t necessarily hurt performance (unless you go for 2.5″ or more in diameter), but you won’t see a boost in horsepower or torque with anything larger. The Miata required almost double (92 percent more) the amount of methanol compared to the pump-sourced 93, but it required the least amount of ignition timing to find Mean Best Torque. Despite the softer ignition curve, the methanol-fueled Miata gained an impressive 24 horsepower and with 16 lb.-ft. of torque. Also in 2001, Mazda freshens the MX-5 Miata's headlights and taillights, adds variable intake-valve timing for the 1.8-liter (bringing horsepower up to 155 ponies), and makes 15-inch wheels standard. It initially featured a 1.6 L (98 cu in) inline-four engine making 116 horsepower; in late 1993, a larger 1.8-liter engine was made standard in most markets. The MX-5 was designed with inspiration from the Lotus Elan , and features such as pop-up headlights, unique to the NA model, and slim chrome door handles pay homage to the famous British The NC is the first MX-5 generation to feature a retractable hardtop variant, with its roof being able to fold and unfold in 12 seconds without sacrificing trunk space. 2006—2008 (NC1) The third-generation MX-5 has fender bulges over the wheel wells. Mazda MX-5 NC 2.0 L MZR LF-VE engine. The exterior styling by Yasushi Nakamuta resembled the B-series internals make it a long way up the horsepower ladder, but to reach 1,000 it’ll need something burlier. Builders recommend, for high boost applications, new pistons, rings, rods, and main bearings. The next round of upgrades involves turbocharging it. A stock head will run up to 18 psi of boost with a built bottom end, and a A standard Formula 1 engine must be 1.6L with 90° V6, have a bore of 3.15in (80mm) and a stroke of 2.09in (53mm). Not only that, but a Formula 1 car can only hold up to around 37 gallons (110kg to be exact). Many Formula 1 teams may not even fill their tanks completely with fuel to limit the weight. This engine on its own can produce 840hp. Engine changes consist of retarded timing, retarded exhaust cam, and a .4 reduction in compression ratio.Mazda claims about 10 less horsepower for the auto engine. Still, the swap is fairly simple, not that much harder than a clutch swap. The Parts. To do this swap, you'll need a few parts: clutch disk. flywheel. MgPX1Y.