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its absolutely not possible, the math just doesn't add up either, figure out the amount of fuel that 4 550cc injectors flow, then look at the stats on the fuel pump.
440cc's you'll hit around 80% DC at 6000RPM ish, it'll max out around 7ish, i doubt you'll be able to keep the fuel low.
550cc's will hit a bit later, but i was able to keep the AFR's where they were wanted, but the DC was well into the 90s at 7000 RPM, limiting the RPM to 8200 basically made it ok, but the proper way to fix it is to add fuel volume, told em never to go below 3/4 of a tank, at that torque level you'll hit 90% DC much much earlier and it'll go lean, i could not get the fuelling below 12.8, then it rapidly leans out, which gives absolutely no margin for error.
low tank, long corner or fuel pickup problem and say buh bye, 550's need the 255 pump, you're at almost double the capacity for the pump at that cc.
someone mentioned to me about over voltaging the pump, thats a terrible idea too.
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