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Injector Deadtime

EFI Tuning Fundamentals

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Hi,

I just watched the video about injector deadtimes.

I also have the ID1000 injectors. When choosing the deadtime/offset from the table, I have to select the fuel pressure.

here my question:

Which fuel pressure do I have to pay attention to:

a) engine running idle

b) engine off (or engine running idle and taking off the hose from intake manifold to fuel pressure regulator

because here is a difference of about 8-10 psi

Thanx alot!!

Deadtimes are only relevant to "differential fuel pressure" or in other words fuel rail gauge pressure - manifold gauge pressure. So "b" (engine off) would give you the correct result as manifold gauge pressure is zero when the engine is off.

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