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

[Cubes]

When I was running std injectors on mysetup at peak power I saw 92% duty.

Over rev it a tad (another 400rpm) and to hold a 12:1 AFR I had to run 100% duty.

[justin911]

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.

[Robo's]

how many kw/psi were you running ?

240rwkw, 20psi

[tridentt150v]

Be conservative, reset your pfc rpm limit until you can afford bigger injectors, should work?

[drf76]

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 April 1, 2007 by drf76

[Adriano]

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.

[STATUS]

good point. thanks mate

if your in VIC get CREATD to do em for even less..... same thing and you dont give away a good set of injectors.

[Gazee]

Buy nismo inj. dun risk your motor unless you have money to burn...