How far have you pushed Siemen Deka 80lbs
03-20-2014, 06:01 PM
#1
How far have you pushed Siemen Deka 80lbs I am wondering how far you guys have pushed your Siemen Deka 80lbs injectors.
Duty cycle info, what pressure your using, and pulse width info would be appreciated. As well as the more basic I made this much with this setup.
Duty cycle info, what pressure your using, and pulse width info would be appreciated. As well as the more basic I made this much with this setup.
03-20-2014, 07:47 PM
#6
I doubt they would open with that much fuel pressure, not unless you were running enough boost to help them open. Even then the effect of the intake pressure to aid in opening an injector is not much.
Nevertheless, I am running triple 255s.
Nevertheless, I am running triple 255s.
03-20-2014, 08:42 PM
#7
Deka 83 lb injectors on E70. 70-75 PSI base pressure, so he would be around 90 PSI in boost. Running mid 8s.
If he can do it with the extra fuel demands of the ethanol, I'm sure you could manage decent numbers on gas.
Trending Topics
03-21-2014, 12:43 PM
#10
Explain something to me, how is it possible for an injector to be energized and spraying longer than the amount of time the valve is open? It is not physically possible for an injector to go over %100 duty cycle.
Last edited by My6speedZ; 03-21-2014 at 10:30 PM.
03-21-2014, 09:05 PM
#16
Going over 100% duty cycle doesn't mean that the valve is closed, either. Your injectors don't know what your cam profile is and don't judge duty cycle accordingly.
03-21-2014, 09:52 PM
#17
do you realize what injector duty cyle even is??
you only have X amount of time between 4 cycles of an individual cylinder (2 rotations) at a given RPM
IDC the percentage of the injector is open compared to that amount of time between 2 revolutions and given rpm
you cant have injector duty cycle of more than 100%, they are static at that point
The following users liked this post:
Project GatTagO (02-01-2022)
03-21-2014, 10:01 PM
#18
lol at cam whatever or another
at 8000rpm you only have 15 milliseconds between 2 engine rotations
you realize with a typical 230* cam you have under 5 miliseconds that the valve is open with usable lift
at 8000rpm lets say you have a raw injection time of 10milliseconds..... that is an IDC of 66.7%..... 10/15
at 8000rpm you only have 15 milliseconds between 2 engine rotations
you realize with a typical 230* cam you have under 5 miliseconds that the valve is open with usable lift
at 8000rpm lets say you have a raw injection time of 10milliseconds..... that is an IDC of 66.7%..... 10/15
03-21-2014, 10:15 PM
#19
lol at cam whatever or another
at 8000rpm you only have 15 milliseconds between 2 engine rotations
you realize with a typical 230* cam you have under 5 miliseconds that the valve is open with usable lift
at 8000rpm lets say you have a raw injection time of 10milliseconds..... that is an IDC of 66.7%..... 10/15
at 8000rpm you only have 15 milliseconds between 2 engine rotations
you realize with a typical 230* cam you have under 5 miliseconds that the valve is open with usable lift
at 8000rpm lets say you have a raw injection time of 10milliseconds..... that is an IDC of 66.7%..... 10/15
duty cycle. Unless that is his witty way of telling us hes
spraying "a crap load of fuel", I almost thought he was being sarcastic.
I know I can run these the math is there, I just wanted to post and see if there was some characteristic to these injectors specifically in the real world I need to take into account.
Things such as after a certain pressure they like to stick closed. Feedback of that nature, stuff that only comes out from having used them.
