On Fuel Injectors, what does the lbs/hr mean?
03-14-2005, 10:29 PM
#4
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RE: On Fuel Injectors, what does the lbs/hr mean?
ORIGINAL: 87 hatch
so why and when would i need to upgrade my fuel injectors.
so why and when would i need to upgrade my fuel injectors.
stock injectors are 19 lb/hr. you will need to upgrade them to supply the engine with more fuel if your making a lot of power. usually stock injectors reach 100% duty cycle at around 300 HP. you can compensate for this like i did by getting an adjustable fuel pressure regulator to bump the pressure up a little to make the stock injectors perform like 20-22 lb/hr ones. you dont want to run to much pwoer on small injectors though because that can cause a lean condition which leads to pre-ignition. good luck.
03-15-2005, 12:35 AM
#6
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Location: Philly. PA.
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RE: On Fuel Injectors, what does the lbs/hr mean?
ORIGINAL: angcobra
Rule of Thumb I have used is (injector size multiplied by number of cylinders multiplied by 2) gives max HP for injectors. 19 X 8 X 2 = 304
Rule of Thumb I have used is (injector size multiplied by number of cylinders multiplied by 2) gives max HP for injectors. 19 X 8 X 2 = 304
YES
REMEBER A POUND THAT THEY TALK ABOUT IS A METRIC FLUID MESSUREMENT
pounds are to gallons what centimeters are to inches
03-15-2005, 01:41 PM
#8
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RE: On Fuel Injectors, what does the lbs/hr mean?
ORIGINAL: fats429
REMEBER A POUND THAT THEY TALK ABOUT IS A METRIC FLUID MESSUREMENT
pounds are to gallons what centimeters are to inches
REMEBER A POUND THAT THEY TALK ABOUT IS A METRIC FLUID MESSUREMENT
pounds are to gallons what centimeters are to inches
No way is a "POUND" metric fluid measurement. POUND is strictly an English measurement of weight or mass or force depending upon what is being measured. gallons is a measure of volume, not weight or mass or force. you can refer to the density of a liquid and talk about its weight in pounds per gallon however.
POUNDS/HOUR is a mass flow measurement of the fuel flow that the fuel injector is capable of delivering at the stock fuel pressure setting and a 90% duty cycle meaning they are open and flowing 90% of the time.
when you do chemical reactions like the combustion of a fuel/air mixture you use units of mass flow to calculate the quantities of both fuel and air necessary to carry out the reaction calculations which is what was done to develop the internal programming in the ECU for the fuel injection systems in use today.
03-15-2005, 02:17 PM
#9
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RE: On Fuel Injectors, what does the lbs/hr mean?
ORIGINAL: Dbeck002
stock injectors are 19 lb/hr. you will need to upgrade them to supply the engine with more fuel if your making a lot of power. usually stock injectors reach 100% duty cycle at around 300 HP. you can compensate for this like i did by getting an adjustable fuel pressure regulator to bump the pressure up a little to make the stock injectors perform like 20-22 lb/hr ones. you dont want to run to much pwoer on small injectors though because that can cause a lean condition which leads to pre-ignition. good luck.
ORIGINAL: 87 hatch
so why and when would i need to upgrade my fuel injectors.
so why and when would i need to upgrade my fuel injectors.
stock injectors are 19 lb/hr. you will need to upgrade them to supply the engine with more fuel if your making a lot of power. usually stock injectors reach 100% duty cycle at around 300 HP. you can compensate for this like i did by getting an adjustable fuel pressure regulator to bump the pressure up a little to make the stock injectors perform like 20-22 lb/hr ones. you dont want to run to much pwoer on small injectors though because that can cause a lean condition which leads to pre-ignition. good luck.
03-15-2005, 09:57 PM
#10
2nd Gear Member
Join Date: Feb 2005
Location: Philly. PA.
Posts: 381
RE: On Fuel Injectors, what does the lbs/hr mean?
ORIGINAL: roundman
WTF are you saying???
No way is a "POUND" metric fluid measurement. POUND is strictly an English measurement of weight or mass or force depending upon what is being measured. gallons is a measure of volume, not weight or mass or force. you can refer to the density of a liquid and talk about its weight in pounds per gallon however.
POUNDS/HOUR is a mass flow measurement of the fuel flow that the fuel injector is capable of delivering at the stock fuel pressure setting and a 90% duty cycle meaning they are open and flowing 90% of the time.
when you do chemical reactions like the combustion of a fuel/air mixture you use units of mass flow to calculate the quantities of both fuel and air necessary to carry out the reaction calculations which is what was done to develop the internal programming in the ECU for the fuel injection systems in use today.
ORIGINAL: fats429
REMEBER A POUND THAT THEY TALK ABOUT IS A METRIC FLUID MESSUREMENT
pounds are to gallons what centimeters are to inches
REMEBER A POUND THAT THEY TALK ABOUT IS A METRIC FLUID MESSUREMENT
pounds are to gallons what centimeters are to inches
No way is a "POUND" metric fluid measurement. POUND is strictly an English measurement of weight or mass or force depending upon what is being measured. gallons is a measure of volume, not weight or mass or force. you can refer to the density of a liquid and talk about its weight in pounds per gallon however.
POUNDS/HOUR is a mass flow measurement of the fuel flow that the fuel injector is capable of delivering at the stock fuel pressure setting and a 90% duty cycle meaning they are open and flowing 90% of the time.
when you do chemical reactions like the combustion of a fuel/air mixture you use units of mass flow to calculate the quantities of both fuel and air necessary to carry out the reaction calculations which is what was done to develop the internal programming in the ECU for the fuel injection systems in use today.
look it up it is
went to buy a AC for my kids room about 5 years ago , did not know how they sized them up . they are sold by the BTU's did not know what that was either . I looked it up it was the amount of engenry it takes to change one POUND of watter 1 degre in one second thats a BTU . British Thermal Units . LOOK IT UP thats WTF I'm saying
It is a metric fulid messurement . Ford went metric in the 80's but the parts made by the U.A.W are still standert that is why you drive
5.0L insted of a 302 mustang a leater = 1000cc's look it up if it was standert or english as you call it, it would gallons per hour injectors