Stroker at 15psi, fuel cut at 4100rpm?

[TSi_with_psi]

When im at 15psi, i can only rev up to 4100 rpms before i hit what im pretty sure is fuel cut. The car completely studderes/lurches/sounds almost like a backfire. Its really loud. Before i ported my wastegate, it would boost creep up to 17psi and then it would hit what i think is fuel cut. Now that i ported the wastegate and manifold, i dont have any boost creep issues, but it will hit fuel cut at 15psi at about 4100 rpm. My theory is that it is flowing a lot more air now because i ported it, so it hits fuel cut sooner. My question is this: Does the ECU monitor Injector Duty Cycles to decide when to trigger fuel cut, does it look at the MAF sensor signal, or could my MAF sensor be maxing out causing the "fuel cut". Im running a stock 1g maf. Thanks.

 

[oldman420]

Need some more info, do you have a logger, wideband, egt guage? Sounds like fuel cut but their is no way to tell without more information.

 

[TSi_with_psi]

One other piece of information that might be helpful is if i keep the boost at 10psi, it can rev up at least to 5500rpm without any problems. I'm keeping it at 10psi by simply letting off the throttle some because i need to adjust my boost controller. It seems to me like the engine is flowing to much air for the stock injectors and simply maxing them out. I don't have a logger or any way of getting more information at this point either. I have an AEM EMS and a set of 880cc injectors that i need to install really bad. I know that would fix the problem, and then i would have all the information that i need about what is going on in the engine. For now though i was just wondering what the ecu looks at to determine when to trigger fuel cut?

 

[TunaTalon]

Yup, you need bigger injectors and fuel control.

Fuel cut is determined by mass air flow. With a 2.3L stroker and stock boost and normal temperature you should be hitting fuel cut about 6000 RPM. But you're in Walla Walla and it's cooler there. At lower temps or higher boosts fuel cut will come earlier.