Does anyone know of the 3 uses a returnless fuel system? If so, then a rising rate regulator won't do any good cause the fuel line has a fix constant fuel pressure and since there is no return line, there is nothing to restrict to rise the fuel pressure. Also, it's the first time I hear adding a rising rate will increase duty cycle of the injectors. I always thought duty cycle is controlled by the fuel map inside the ecu. Correct me if I'm wrong please.kenstyle said:If you want to fix this just put a rising rate regulator on your fuel rail. Either that or an adjustable one. This will allow you to let more fuel then the stock regulator will allow. Of course this will also increase your injectors duty cycle, but most manufacturers do around 50-60% duty cycle. Rule of thumb is not to let them go about 80%.
This should fix the problem and I believe APEXi selles there for like 215.