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Is It Safe To Run 92% Duty Cycle On Stock Injectors

R33GOD

By R33GOD,
in Engines & Forced Induction

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justin911 Grand Master

justin911

Posted
Posted

how many kw/psi were you running ?

92% is fine. You will find even in cold weather it won't alter that much, maybe 93% but never near 100%. Ive ran close to 98% and constitantly monitored it. Thats living on the danger side though with one eyed glued on the PFC. I ran a 2535 turbo with a adj. fuel pressure regulator.
drf76 Collaborator

drf76

Posted
Posted (edited)
This would point to other problems not related to injector size or duty cycle.

say u were running 100% duty cycle, that means you hold the injector open like a garden hose (no pulsing-no break), so logically this would put extra load on injectors/wiring etc so this problem can be related to injector size/duty cycle, bottom line is that running them at above 85% is not a recommended thing for a number of reasons.

Edited by drf76
Adriano Grand Master

Adriano

Posted
Posted
say u were running 100% duty cycle, that means you hold the injector open like a garden hose (no pulsing-no break), so logically this would put extra load on injectors/wiring etc so this problem can be related to injector size/duty cycle, bottom line is that running them at above 85% is not a recommended thing for a number of reasons.

Sorry, peak current throught the wiring is initial pulse, called startup current, so 100% duty cycle would actually be putting less strain on the wiring than 80%, The current draw from injectors is never going to damage wiring, as car injector wiring is usually 10A wire, and injectors draw far less than that, the only way there can be a problem is using low impedence injectors with an ecu designed for high impedence/low current injectors.

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