bigger injectors 4.0 sohc
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02-26-2008
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02-26-2008
#3
02-27-2008
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I'm wondering something similar......would slightly bigger injectors, like 5lbs more, be any benefit for a stock engine with mild bolt ons and a programer??
Im no expert at building motors..but from what I've heard and been told the stock injectors are good for making up to 300 hp..so im guess that cranking the fuel on a stock or slightly modified motor is just going to run it rich...theres not much to increase the air enough with out a turbo or super charging it to keep the air/fuel ratio correct but thats just my opinion..i am planning on building a serious forced injection motor..im looking at running anywhere for 4 to 5 hundred horses...if by mods you mean cold air and headers and exhaust then your air/fuel ratio is gonna run lean a bit..so a quick tune on a programmer could fix that with out having to change the injectors...these are computer controled motors so..theres no simple bolt on for these motors everything has to be tuned after words..
btw.....foot pounds???? lol....I hope you mean pounds per square inch(PSI)/
Im no expert at building motors..but from what I've heard and been told the stock injectors are good for making up to 300 hp..so im guess that cranking the fuel on a stock or slightly modified motor is just going to run it rich...theres not much to increase the air enough with out a turbo or super charging it to keep the air/fuel ratio correct but thats just my opinion..i am planning on building a serious forced injection motor..im looking at running anywhere for 4 to 5 hundred horses...if by mods you mean cold air and headers and exhaust then your air/fuel ratio is gonna run lean a bit..so a quick tune on a programmer could fix that with out having to change the injectors...these are computer controled motors so..theres no simple bolt on for these motors everything has to be tuned after words..
btw.....foot pounds???? lol....I hope you mean pounds per square inch(PSI)/
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02-28-2008
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#12
12-07-2009
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The PCM won't compensate for the larger injectors, it only knows what size they are if you retune and program the PCM the size of injector. So larger injectors without a tune will equal tons of extra fuel.
#13
12-07-2009
This is called "scaling the pulsewidth" - also, you need to adjust the latency.
This is a waste of money for a stock engine truck if you ask me (I only tune cars professionally, so what do I know! Jeeesh!)
#14
03-23-2011
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you need to match the MAF to the injector #. '04 Rangers have the fuel pressure regulator in the tank so you can't add an adjustable one either. Can't remember what year was the last to have an external unit.
If you put a wide band o2 sensor in the exhaust you can adjust the fuel pressure to get the best ratio. My old shop foreman built engines and said the T-bird S/C had some of the highest flowing stock injectors, but I have no proof of that.
If you put a wide band o2 sensor in the exhaust you can adjust the fuel pressure to get the best ratio. My old shop foreman built engines and said the T-bird S/C had some of the highest flowing stock injectors, but I have no proof of that.
#15
02-08-2012
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johnson
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