Other options include swapping to a 99+ engine (140 hp/119 tq vs our 115 hp/100 tq), but that would still require some more doing to get more powah. From what I've read, dyno at the wheels for a supercharged 1.6 will bump you from somewhere in the 90ish hp/80ish tq at the wheels to somewhere around 130/120, which would hit our goals.
The 2003 Mazda MX 5 Miata (NB) 1.8 has a Inline 4, Petrol engine with 1839 cm3 / 112.2 cu-in capacity. How many horsepower (hp) does a 2003 Mazda MX 5 Miata (NB) 1.8 have? The 2003 Mazda MX 5 Miata (NB) 1.8 has 140 PS / 138 bhp / 103 kW. How much does a 2003 Mazda MX 5 Miata (NB) 1.8 weighs? The 2003 Mazda MX 5 Miata (NB) 1.8 weighs 1025 Kg
The Miata engine weight will vary slightly depending on which engine you have. The 1.6L weighs around 272 pounds and the 1.8L weighs about 290 pounds. This is lower than the average engine weight of around 350 pounds , so it’s looking good if you’re trying to make the car as light as possible! How much horsepower can you add to a Miata? How Much Hp Can A Miata 5 Speed Handle? Part WTRQ WHP; Engine Damper: 200-250: 230-260: 5 Speed Gearbox: 250~ 270-300: 6 Stock internals should be good for 260 ish rwhp. You may have some trouble reaching 222 on the stock turbo, maybe with 12 - 13psi. From memory our turbo is about 7hp / psi and starts to run out of huff at 12psi.
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.
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  • how much hp can a 1.6 miata handle