Hi guys,
Need some help...I currently using a JRSC 14 psi setup with a built 9:1 compresion engine. I already max out my current 310 RC injectors, what whould be the maximum injector size that I can use without replacing the stock ECU. Thanks.

 

Are you sure you maxed out your injectors and not the stock ECU? The fuel maps in the stock ECU might not be allowing the injectors to give the max (pulse duration). You can go larger on the injectors and the ECU should contorl the A/F mixture.

 

get the vafc with injector box and use dsm 450ccs.

 

Stock ECU runs 100% duty at higher rpm so its not the ecu.
310cc iks about as big as you can go on a stock ecu, but you should really
think about getting a real form of engine management.

 

yeah i got 310's and with just an ecu and v-afc it struggs

 

310's