Thread: Fuel Cut #3
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Old 08-15-2008   #8
Shane@DBPerformance
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Re: Fuel Cut #3

Boost leaks after the MAS, whether it's a stock setup or a blow through MAFT setup will make the car more likely to hit fuel cut and make it run richer, because it's reporting more airflow to the ECU than is actually making it to the engine. Boost leaks before the MAS on a blow through MAFT setup would just make the car lose power and be more prone to knock because the turbo is having to work harder than normal.

You don't want to use the "fuel cut" clamp hack of the MAFT, it's a very poor solution. As Chris said, you need to put in bigger injectors and then dial down the MAFT. It's the same trick that people have been doing with the SAFCs to avoid fuel cut forever.

Or you could get an EPROM ECU in there with fuel cut removed. The stock 450ccs can handle a decent amount more power once the fuel cut in the ECU is removed. Fuel cut has nothing to actually do with fuel supply problems, it was designed as a way to save the car from a wastegate/vacuum line failure that would cause a serious overboost.
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