Hello, I have a freshly rebuilt s5 tII engine, hasn't been broken in yet. It's running 550cc primary, 750cc secondary, and a Walbro 255 lph fuel pump high pressure. Would it be a wise idea to install an Rtek 1.7 because the fuel map would be corrected to compensate for the larger secondary therefore keeping it from running very rich? Thanks!

 

It would be fine.

 

Did you really have to ask that question?
reread the digitaltuning website... It is a stock ecu with modern technology in it. It would be better using that ecu than a stock one.

 

yes and the Rtek changes Mazda's original programming for injector staging to eliminate a potential stumble/hesitation.

 

Ok, thanks everyone.