i might have ordered the wrong size injectors..
07-26-2009, 06:38 PM
#5
injectors (500hp) x (0.5 lb/hp-hr) =250lbs a hr
so if you take the 250 divided by 8 number of cyclinder = 31.25 lb injector but you want to hava a sfety margine of at least 20% with that in mind you would be closer to a 38 or 39lbs injector, some more axamples
the 0.5 is bsfc number for a N/A motor (brake specific fuel comsumption)
also make sure when you order your injectors make sure you understand if they are rated at a 3bar or 4 bar which are cars are even if rated at 3 bar just make sure to rescale to 4 bar setup.
(600hp) X (0.5lb/hp -hr) = 300 .... so divide 300 divided by 8 (number of cyclinder) = 37.5lbs injector dont forget your safety margin of 20%
with all said I would say a set of 38lbs injectors at 3 bar scale them to a 4 bar setup and you will have plenty of injector for your setup.
so if you take the 250 divided by 8 number of cyclinder = 31.25 lb injector but you want to hava a sfety margine of at least 20% with that in mind you would be closer to a 38 or 39lbs injector, some more axamples
the 0.5 is bsfc number for a N/A motor (brake specific fuel comsumption)
also make sure when you order your injectors make sure you understand if they are rated at a 3bar or 4 bar which are cars are even if rated at 3 bar just make sure to rescale to 4 bar setup.
(600hp) X (0.5lb/hp -hr) = 300 .... so divide 300 divided by 8 (number of cyclinder) = 37.5lbs injector dont forget your safety margin of 20%
with all said I would say a set of 38lbs injectors at 3 bar scale them to a 4 bar setup and you will have plenty of injector for your setup.
07-27-2009, 06:12 AM
#6
(500hp) x (0.5 lb/hp-hr) =250lbs a hr
so if you take the 250 divided by 8 number of cyclinder = 31.25 lb injector but you want to hava a sfety margine of at least 20% with that in mind you would be closer to a 38 or 39lbs injector, some more axamples
the 0.5 is bsfc number for a N/A motor (brake specific fuel comsumption)
also make sure when you order your injectors make sure you understand if they are rated at a 3bar or 4 bar which are cars are even if rated at 3 bar just make sure to rescale to 4 bar setup.
(600hp) X (0.5lb/hp -hr) = 300 .... so divide 300 divided by 8 (number of cyclinder) = 37.5lbs injector dont forget your safety margin of 20%
with all said I would say a set of 38lbs injectors at 3 bar scale them to a 4 bar setup and you will have plenty of injector for your setup.
so if you take the 250 divided by 8 number of cyclinder = 31.25 lb injector but you want to hava a sfety margine of at least 20% with that in mind you would be closer to a 38 or 39lbs injector, some more axamples
the 0.5 is bsfc number for a N/A motor (brake specific fuel comsumption)
also make sure when you order your injectors make sure you understand if they are rated at a 3bar or 4 bar which are cars are even if rated at 3 bar just make sure to rescale to 4 bar setup.
(600hp) X (0.5lb/hp -hr) = 300 .... so divide 300 divided by 8 (number of cyclinder) = 37.5lbs injector dont forget your safety margin of 20%
with all said I would say a set of 38lbs injectors at 3 bar scale them to a 4 bar setup and you will have plenty of injector for your setup.
So to simplify the equation
EHP (estimated hp) X .5 (for BSFC) / 8 = required injector size?
are you adding 20% to the initial HP number or the size of injector you need because on a 500HP model your final product = 37.5lb if you add it to the injector size where as if you add 20% to 500 it gives you the exact same answer nevermind forget that question I answered it as I was typing.
so the FINAL simplified equation would be
([EHP] [EHP x .2]) (.5) / 8 = IS *injector size*
where
07-27-2009, 02:55 PM
#7
This is the first time someone has explained anything to me that involves algebra and actually had it make sense.
So to simplify the equation
EHP (estimated hp) X .5 (for BSFC) / 8 = required injector size?
are you adding 20% to the initial HP number or the size of injector you need because on a 500HP model your final product = 37.5lb if you add it to the injector size where as if you add 20% to 500 it gives you the exact same answer nevermind forget that question I answered it as I was typing.
so the FINAL simplified equation would be
([EHP] [EHP x .2]) (.5) / 8 = IS *injector size*
where
So to simplify the equation
EHP (estimated hp) X .5 (for BSFC) / 8 = required injector size?
are you adding 20% to the initial HP number or the size of injector you need because on a 500HP model your final product = 37.5lb if you add it to the injector size where as if you add 20% to 500 it gives you the exact same answer nevermind forget that question I answered it as I was typing.
so the FINAL simplified equation would be
([EHP] [EHP x .2]) (.5) / 8 = IS *injector size*
where
0.65 (Glad it made sense for ya.)
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07-28-2009, 11:16 AM
#8
the car will be an n2o application..
I'm surprised at 6am I was able to understand the math behind that and then a couple hours later repeat and explain it to someone else. And I could still tell you the formula without looking. Weird.
I'm surprised at 6am I was able to understand the math behind that and then a couple hours later repeat and explain it to someone else. And I could still tell you the formula without looking. Weird.
