Hey all,

My S1 is running gotech EFI management and cossie injectors, been out road mapping the car and to get anywhere near my desired air fuel ratio of around 12.9(best for power, dont care about fuel economy lol). They are going way beyond a safe duty rate of 75% and flowing around 88% and sometimes 105% which is obviously not good and making it run lean and hot when the injector cant flow the fuel.

Its currently running 2wd sierra injectors(yellows) which i believe are 330cc.

What injectors should i upgrade to? Not planning on doing any more power mods as this will be pretty rapid as it is am i looking at 4x4 injectors or escos? They should also go straight into my fuel rail and inlet considering its been modified to take the yellows no?

Thanks.