I just got a set of 4 injectors back from WitchHunter Performance (www.witchhunter.com) and I was concerned about the actual measured flow rate, even though it's even across the set.
They are Bosch p/n 0-280-150-785 for the orange 850 Turbo injectors. They flowed 207cc/min at 43.5psi.
Anyone else have measured data on the orange 850 Turbo injectors?
I wonder how it could be so much lower than published data. We ran the same injector on our lemons car with ~14psi boost, probably making close to 200whp....if they actually flowed that little, I think we run out of injector...but AFRs were safely into the 12s at WOT down the straights.
Other sources list their flow rate at 43.5psi at over 300cc/min, but that doesn't seem accurate. I noticed here that 310cc/min is given at 57psi instead of 43.5psi. At 43.5psi they're listed at 270.9cc/min...still considerably higher than 207-208cc/min.
http://users.erols.com/srweiss/tableifc.htm
My injectors yielded 208, 208, 207, 207 cc/min @43.5psi
Other measurements from the service:
Resistance: 14.5, 14.4, 14.5, 14.4
Static flow:
dirty: 102, 103, 0, 100
clean: 104, 104, 103.5, 103.5
Pulsed flow cc@2500rpm:
dirty: 115.5, 117, 0, 114
clean: 117, 118, 117, 117.5
static variance: 0.5% after cleaning
pulsed variance: 0.8% after cleaning
They are Bosch p/n 0-280-150-785 for the orange 850 Turbo injectors. They flowed 207cc/min at 43.5psi.
Anyone else have measured data on the orange 850 Turbo injectors?
I wonder how it could be so much lower than published data. We ran the same injector on our lemons car with ~14psi boost, probably making close to 200whp....if they actually flowed that little, I think we run out of injector...but AFRs were safely into the 12s at WOT down the straights.
Other sources list their flow rate at 43.5psi at over 300cc/min, but that doesn't seem accurate. I noticed here that 310cc/min is given at 57psi instead of 43.5psi. At 43.5psi they're listed at 270.9cc/min...still considerably higher than 207-208cc/min.
http://users.erols.com/srweiss/tableifc.htm
My injectors yielded 208, 208, 207, 207 cc/min @43.5psi
Other measurements from the service:
Resistance: 14.5, 14.4, 14.5, 14.4
Static flow:
dirty: 102, 103, 0, 100
clean: 104, 104, 103.5, 103.5
Pulsed flow cc@2500rpm:
dirty: 115.5, 117, 0, 114
clean: 117, 118, 117, 117.5
static variance: 0.5% after cleaning
pulsed variance: 0.8% after cleaning