randeez stable
forum member
I have 52# injectors that came with my Procharger stage II kit on my 2011 GT.
Are they large enough to support 600 rwhp ?
Are they large enough to support 600 rwhp ?
start with this http://fuelinjectorclinic.com/flow-calculator
I believe duty cycle has to do with the amount of time the injector is open vs closed. You really don't want to be above 80-85% duty cycle.
This; you are playing with fire at 90%; for whatever reason people will spend XX amount of money on parts but never fuel and that is one of if not the most crucial part of the equation.
According to that chart. I got a 47# injector ( mine are 52#) at 90% duty cycle ( they recommended this) to achieve 600 rwhp at 54 # fuel pressure. ( from my gauge)
Can someone explain what duty cycle refers to here?
According to that same site with your information I get 56lb/hr injectors @ 90% duty cycle. IIRC fuel pressure in our vehicles is around 39 psi. At 85% duty cycle you'll want closer to 59lb/hr. So get some 60's.
Get a baseline tune from your tuner for the new injectors to drive to the dyno, or wait to change the injectors till you get there. If you run the bigger injectors with the tune for the smaller injectors you'll likely run into issues with running rich. The ECU will try to compensate, but it will fluctuate wildly since it thinks its injectors are smaller than they actually are.
Get a baseline tune from your tuner for the new injectors to drive to the dyno, or wait to change the injectors till you get there. If you run the bigger injectors with the tune for the smaller injectors you'll likely run into issues with running rich. The ECU will try to compensate, but it will fluctuate wildly since it thinks its injectors are smaller than they actually are.
This; you are playing with fire at 90%; for whatever reason people will spend XX amount of money on parts but never fuel and that is one of if not the most crucial part of the equation.
I have been watching videos on 5.0 fast fords, and looked on the Brenspeed site. They made 600 rwhp with a Vortech kit , longtubes, catted X pipe and 52 pound injectors just like I have. They also added a BAP which Im planning. ( 5.0 Coyote)
I also went on the Kennedy dyno tune site and they said that 50 pound injectors were good to 600 rwhp.
I am getting some what confused as Im being told on here that 52 pound injectors will not be good enough for 600 rwhp on a Coyote.
Guess the next move is to call Donny Walsh, my tuner, and ask him.
You could just keep asking the same question until you get the answer you want.
The correct accurate answer would be nicer.
The other thing to consider is how much time you expect to be putting out the full 100% output capability of your engine. If you have 52lb injectors and can squeeze 700hp out of them with a BAP and 100% duty cycle, what's it going to hurt if you only utilize all that capability once or twice per year? You're not going to be anywhere near 100% duty cycle driving around town 99.9% of the time.