The relatively small bump in power has a big effect on the roadster's performance capabilities.
If there's one thing we won't get from the Mazda MX-5 Miata direct from the manufacturer, it's a more powerful engine, although that is probably for the best. For those looking for a moderate increase in power, there is a multitude of grease monkeys who are more than happy to extract more potential from the inline-four engine under the hood. The latest of the batch is the globally renowned Miata specialist, BRR who has devised a bolt-on supercharger kit with two power output options.
BRR has been in the business of making Miatas faster since the 80s when the NA hit the global market with a bang. This kit in particular is not too different from the one it introduced for the NC generation earlier this year, but it is down on power in comparison.
The Rotrex kit is available for the 2015 to 2019 ND model years fitted with the SkyActiv-G 2.0-liter four-cylinder engine. A kit for models produced thereafter is still being developed. As standard, this modest engine produces 181 horsepower and 151 lb-ft of torque, sent to the rear wheels via your choice of a six-speed manual or automatic transmission.
Via BRR's stage one kit, which also includes an EcuTek engine remap, the power output will increase to an impressive 222 hp and a little more than 200 lb-ft, available from 3,750 to 5,750 rpm. The result of this is an improved 0-60 mph time of 5.3 seconds. This is two seconds faster than the standard car's claimed time.
Although it is a small bump in power, because of the small roadster's curb mass, this increase massively alters its power-to-weight ratio. We do ponder just how effective this would be on the highly popular and no longer available Club trim.
With the stage two kit, BRR concentrated on improving the supercharger's flow rather than the boost pressure. It achieved this by applying its TIG-welded stainless steel 2.5-inch high-flow exhaust system together with an optional Forge Motorsport intercooler upgrade for maintaining optimal engine temperatures. This increases the output to 247 hp and 220 lb-ft. Although this is a significant increase in power, the 0-60 mph time only decreases to 5.1 seconds.
Prices for the stage one kit, including fitment, start at approximately $5,415 and also includes a new intake restrictor, K&N Typhoon induction kit, new silicone hoses, and other components needed to help the engine run with a supercharger. The stage two kit, excluding the intercooler, will set you back by about $7,340. Both kits are covered by a 12-month warranty.