bigger injectors 4.0 sohc - Ranger-Forums - The Ultimate Ford Ranger Resource


Forced Induction & N20 Tech General discussion of forced induction and nitrous for the Ford Ranger.

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Old 02-26-2008
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bigger injectors 4.0 sohc

where can i find bigger injectors i need to run around 33 foot pounds...but your suppose to run at 80 to 85 percent of what the injectors run so i want around 36 or 37 pound ones.
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Old 02-26-2008
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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??


btw.....foot pounds???? lol....I hope you mean pounds per square inch(PSI)/
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Old 02-27-2008
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Quote:
Originally Posted by Fx4wannabe01 View Post
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)/
haha yea man i spent like the past 5 hours figuring every factor i need to build that motor...my brain was spent.
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Old 02-27-2008
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wow i messed that thread up some how haha
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Old 02-27-2008
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injectors wont flow any more fuel then the pcm will tell it. they will run at a different duty cycle to compensate for the extra nozzle flow.
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Old 02-28-2008
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maybe bigger injectors and fuel pump then get it tuned?
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Old 02-28-2008
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im running 60# injectors in my truck... The duty cycle is...well, was way down, I have a feeling thats gonna change soon.
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Old 02-28-2008
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I have 42# injectors . Their duty cycle variates as will yours with boost.
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Old 02-28-2008
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I have 42# injectors . Their duty cycle variates as will yours with boost.


where do you find those
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Old 02-28-2008
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check ebay
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Old 02-29-2008
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where do you find those
www.summitracing.com
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Old 12-07-2009
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Quote:
Originally Posted by Fx4wannabe01 View Post
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??


btw.....foot pounds???? lol....I hope you mean pounds per square inch(PSI)/
Quote:
Originally Posted by optikal illushun View Post
injectors wont flow any more fuel then the pcm will tell it. they will run at a different duty cycle to compensate for the extra nozzle flow.
The pounds means pounds of fuel they flow per hour.

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.
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Old 12-07-2009
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Originally Posted by tractorman View Post
The pounds means pounds of fuel they flow per hour.

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.

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!)
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Old 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.
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Old 02-08-2012
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browntops i believe are the best and yet the cheapest injectors...and there ford
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