2013 / 2014 GT500 Fuel Injector Clarification

CobraJet330

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Hello all,

I am looking to get some clarification in regards to the true flow rate of the OEM 13/14 GT500 fuel injectors. The injector in question is Ford p/n, M-9593-MU52 (Ford engineering number, DR3V-AA).

According to FRPP's website, these injectors flow 52lb/hr and are benchmarked at 39.15psi with a 1.0000 multiplier as a function of injection pressure.

However, looking around various vendor sites, I see this same injector labeled as "52lb", "55lb" and "56lb". I also see a lot of folks on this forum (and others) referring to these injectors as "56lb injectors".

From 52lb (low) to 56lb (high), we are talking about a flow rate difference of approx 7% (4lbs/hr or 42cc/min). Not a huge amount, but definitely enough to make a difference in engine tuning parameters and performance.

This leads me to ask, does anyone know why we call 52lb injectors, "56lb"?

I would find it odd if vendors were advertising flow rates that were taken at different system pressures, as this would defeat the purpose of a benchmark. Im starting to wonder if this is just evolved GT500 nomenclature. Any insight would be great. Thanks all.
 

HKusp

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My tuner said people call them 56lb/hr but they are really 52lb/hr. That being said, they're just numbers. What you need is to know what your tuner can do with them. They'll tell you.
 

VNMOUS1

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They're 52 but WILL flow 56 @ pounds of pressure.

The "56" thing is a sales label. After all, bigger is better, right?

Sent from my SM-N986U1 using Tapatalk
 

CobraJet330

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Thanks for your replies folks. You have confirmed what I suspected to be the truth. Good info to have for reference.
 

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