would runing injectors on 108% duty cycle effect the HP?
10-29-2006, 12:08 PM
#2
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Not for sure but I can tell you that its not a good thing. I dynoed mine and was at 105% and changed them Imediately. I was leaning way WAY out up top. We all know that thats not a good thing.
10-31-2006, 01:30 PM
#4
If I recall, my duty cycles are heaviest at or right after torque peak. They start to roll back down as RPMS climb since youre engine is decreasing in volumetric efficiency past peak tq rpm.
Also of note, while nobody will out and out recommend you do this, people have sucessfully run inj duty cycles up to 140% without blowing **** up. I myself was running a peak of 115% without any detrimental effects, and the wideband was perfectly on target at 13:1. I eventually did move up to some matched SVO 30s cause I didnt want to push my luck.
Also of note, while nobody will out and out recommend you do this, people have sucessfully run inj duty cycles up to 140% without blowing **** up. I myself was running a peak of 115% without any detrimental effects, and the wideband was perfectly on target at 13:1. I eventually did move up to some matched SVO 30s cause I didnt want to push my luck.
10-31-2006, 01:46 PM
#6
Originally Posted by 280Z28
How do you run a duty cycle over 100%? I thought that was always open?
10-31-2006, 02:11 PM
#7
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Originally Posted by GuitsBoy
I believe (and may be wrong here) that 100% would take into consideration the time it takes for the pintle or disk valve to open and close. Meaning as soon as it closes following one squirt, it starts to open back up again. You can potentially flow more fuel by having some overlap, meaning the pintle or disk starts to close but dosnt quite make it before its time to open back up again.
Not saying you're wrong (I dunno?) but that would be weird and wouldn't make sense to me. Trending Topics
10-31-2006, 02:13 PM
#8
Originally Posted by 280Z28
You would get nasty inconsistencies between measurement equipment (like the Fluke 88VA) and the ECU then. It would only make sense that the duty cycle for any injection setup is a measure of the electrical pulse itself. Not saying you're wrong (I dunno?) but that would be weird and wouldn't make sense to me.
Not saying you're wrong (I dunno?) but that would be weird and wouldn't make sense to me.
10-31-2006, 08:08 PM
#9
171 percent duty cycle here. boy was the guy that checked my car with efi live shocked 
i had added 30 percent more fuel from 6500-7500 and the car was still runing lean. nothing changed with that added. so that may be why i got the 171 peek duty cycle 
i got svo 42 lbs and wow! i got the car tuned in almost perfect. throttle response it incredible and it now pulls so dam smooth all the way through. 
i had added 30 percent more fuel from 6500-7500 and the car was still runing lean. nothing changed with that added. so that may be why i got the 171 peek duty cycle i got svo 42 lbs and wow! i got the car tuned in almost perfect. throttle response it incredible and it now pulls so dam smooth all the way through. 
