![]() If this volume doesnt go anywhereor minimized it causes a "dead-head" effect on the system where the fuel can is restricted to flow back to the tank by design. Georges 318i turbo is ready to conquer the world.once weve finished the. The problem exist when the FMU starts holding back this volume in the fuel rail cuz this positive diplacement pump will still push the designed volume. Posted at 13:36h in Aarons Honda CBR1000RR, Blog, FMU Customer Projects. All fuel pumps are "positive-displacement" pumps, meaning it will put out the same volume of fuel at all times and at the designed pressure rate regulated by the FPR. This is the reason fuel pumps get damaged. This in turn causes the fuel to surge through the injectors during the injector cycle. ***All it does is hold the fuel volume in the fuel rail longer by minimizing fuel flow back to the fuel tank. What others also dont realize is the concept and actual mechanical function on these units. ![]() Using a small turbo is even more critical since set boost can be achieved in seconds, meaning the FMU can dump/increase the fuel pressure to max FMU rating within that time frame. Since the fuel pressure doesnt increase until boost is sensed, the N/A to boost transition is always there. ![]()
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