Franko6
Vendor , w/Business number
Injectors that are installed without consideration to pop pressures and flow rate are not going to get fuel economy.
Installing nozzles without knowing if they leak or what pressure they are set is a form of Russian Roulette. Even some who install and 'calibrate' nozzles, we have seen the pistons melted out. That is a runaway nozzle. You will figure it out when the piston cracks in two or the combustion bowl melts into your exhaust port.
+/- .4 is not that close, especially if your pop pressures are low. The average pop pressure we see when first installing a new set of nozzles on injector bodies, is the NOP1 pressure is down around 170-190 bar, when it should be 220. The difference in fueling is not just volume, but atomization. If you are popping low pressures, your nozzles are making larger fuel droplets. Let's face it. The #1 reason for the large pressure increase on the modern CR engines is to blow the fuel into molecules for the most complete burn.
The second stage (NOP2) is even more critical. At the higher pressure at 300bar (4500psi), a shim change of .001" will make a pressure change of about 10 bar, or 150psi. This doesn't seem like much until you figure within a window of pressure, the fuel volume will change dramatically.
So, first, you injectors are undoubtably popping low, for lower atomization and 2) they aren't emitting the same amount of fuel. We usually set injectors under .2mg/str.
I suggest you fix them.
Installing nozzles without knowing if they leak or what pressure they are set is a form of Russian Roulette. Even some who install and 'calibrate' nozzles, we have seen the pistons melted out. That is a runaway nozzle. You will figure it out when the piston cracks in two or the combustion bowl melts into your exhaust port.
+/- .4 is not that close, especially if your pop pressures are low. The average pop pressure we see when first installing a new set of nozzles on injector bodies, is the NOP1 pressure is down around 170-190 bar, when it should be 220. The difference in fueling is not just volume, but atomization. If you are popping low pressures, your nozzles are making larger fuel droplets. Let's face it. The #1 reason for the large pressure increase on the modern CR engines is to blow the fuel into molecules for the most complete burn.
The second stage (NOP2) is even more critical. At the higher pressure at 300bar (4500psi), a shim change of .001" will make a pressure change of about 10 bar, or 150psi. This doesn't seem like much until you figure within a window of pressure, the fuel volume will change dramatically.
So, first, you injectors are undoubtably popping low, for lower atomization and 2) they aren't emitting the same amount of fuel. We usually set injectors under .2mg/str.
I suggest you fix them.