Injector duty cycle 100%...?

[turbanthropas]

Hi,
I'm running bosch greentops injectors(440cc./min-42lb/min) and oftenly I see on Megatune that duty cycle is going to 100%.For example,I can see 100%DC even on 0.8bar and less than 6.000rpm...
There is any chance that I've made a mistake on "injectors characteristics" at Megatune?
Here the values that I'm using:
Injector Opening Time(ms)--1.0ms
Battery Voltage Correction--0.20
PWM Current Limit(%)--100
PWM Time Threshold(ms)--25.5

Injectors are High Impedance.

Thanks in order

[turbanthropas]

I've set it 2 squirts and simultaneous.What can I do now,exept change the injectors with bigger ones?
Thanks for the help!

[turbanthropas]

Lance,

I tried but no result...the engine was running bad and after some seconds,died...
I don't know if has any connection with that,but I'll metion it.After a datalog,where the DC hit 100% ,the Pulse Width never exceed the 1/3(there is no scale to say for sure exactly,but 100% is 25.5ms,so I supose that I had max 8ms)
Is this normal?

Nikolaos

[turbanthropas]

O.K. finally,I manage to set it working on 2 squirts/alternating and I can say that idle now is smoother than ever!
But what I can do else?Is not sounds so...natural that 42lb injectors are enough only for 0.8bar(not even 200hp)

[turbanthropas]

Lance,

the fuel pressure is 2.5bar..so in that pressure the injectors are about 38lb/min.
I've order an adjustable fpr,to rise up the fuel pressure up to 4.5bar.In that pressure,injector flow is about 50-52lb/min.
That would be enough to suport 300hp?

Nikolaos

[TT350chevelle]

Couple things to check, are you referencing the fuel pressure to the intake manifold and is the problem duty cycle maybe the result from accell enrichment being triggered?

Brad J.

[turbanthropas]

Brad,

I checked acceleration enrichment on datalog,and is not activated when dc is 100%...

[moteleb]

Maybe you can post your datalog?

100% duty cycle in megatune is for sure a calculation of entered value. We will see it on your datalog.