Flow Force 640cc Injectors for Mazda MX-5 NA NB


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Flow Force 640cc Injectors

The Flow Force 640cc injector kit is capable of supporting 300whp. Each set of injectors are flow matched to within +/-1% at idle and fully open. This means your engine is getting the correct amount of fuel across all four cylinders. The EV14 spray pattern injects fuel perfectly into the two intake ports, helping them outperform injectors at twice the price. Flow Force’s injector matching process guarantees a silky smooth idle and the peace of mind that individual cylinders aren’t starved of fuel, robbing you of horsepower—or worse—suffering from detonation.

Each kit is carefully designed to be plug and play in NA and NB MX-5s. Simply fit and set the injector size & dead times in your ECU.

Dead Times

NA 3.0 Bar NB 4.0 Bar
Dead Time (13.2V) 1.120 1.261
Voltage Correction 0.144 0.155
11V 140.3% 138.0%
12V 120.9% 119.0%
13V 102.9% 102.5%
14V 90.4% 89.8%
15V 80.7% 79%
16V 73.8% 71.9%
Weight 0.280 kg
Dimensions 17.5 × 17.5 × 5 cm

Flow Force


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Make Model Year
Mazda MX-5 1989 - 2005

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