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Subject: "Simple Injectors Question" Previous topic | Next topic
GhostintheNightMar-04-05 05:11 PM
Member since Jan 25th 2005
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#86676, "Simple Injectors Question"




          

I'm still kinda new to the whole fuel injection part of our engines and all... so bear with me here. If you were to put larger injectors into a primarially stock engine, the only result would be the engine bogging down because of too much fuel right... 'cause there's not enough air getting to the cylinder...right? So if my assumptions are correct, you would really have no need for bigger injectors if you are N/A ... or am i completely wrong... ?

  

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TeamXtremeRSMar-04-05 05:38 PM
Member since May 20th 2003
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#86678, "RE: Simple Injectors Question"
In response to Reply # 0


          

Yes, your thinking is right on. The stock fuel system is more than sufficient for the NA power being made, with a bit of room to spare. If you put in larger injectors, the ECU will still fire them like it's used to, without knowing that they are larger, and you will run way too rich. The Ecu can pull back fuel by lowering the injector pulsewidth(the open time the injector is spraying fuel), but it's limited to how much it can do so. The only time you need larger injectors is when you are adding considerably more amounts of air(ie turbocharger). Also, its not just as simple as putting in larger injectors and driving the car, when adding things such as turbos. Our ECU has no way to control these injectors, so we have to use things like a SAFC, lower fuel pressures, ect..


13.5 @108 MPH-2.2 60ft(stupid FWD!)
S16G @ 18 PSI/FMIC/Running on MegaSquirt II (Now with sequential
fuel injection)

My webpage: http://eclipsed4evr.home.comcast.net
-1998 Mitsubishi Eclipse RS-T- "Toy"
-1992 Plymouth Laser Turbo AWD(SOLD)
-2000 Honda CR-V(daily)

  

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baxsomMar-04-05 06:28 PM
Member since Nov 27th 2004
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#86680, "RE: Simple Injectors Question"
In response to Reply # 0




          

you are correct
our cars run rich from the factory as it is

the only reason that you would need more fuel is if you had more air going in (turbo)



1996 eclipse GS-T
1968 Ford Mustang
2004 Suzuki GSXR600
2006 Honda CBR1000RR
Decisions Decisions

  

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ModeratorbullettdsmMar-05-05 02:10 AM
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#86687, "RE: Simple Injectors Question"
In response to Reply # 0


          

Originally posted by GhostintheNight
I'm still kinda new to the whole fuel injection part of our engines and all... so bear with me here. If you were to put larger injectors into a primarially stock engine, the only result would be the engine bogging down because of too much fuel right... 'cause there's not enough air getting to the cylinder...right? So if my assumptions are correct, you would really have no need for bigger injectors if you are N/A ... or am i completely wrong... ?


We have a winnaH!! Very good grasshopper! There are many out there who can't quite grasp the reality that you have already laid claim to, "bigger is not always better" emoji
MB

  

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GhostintheNightMar-06-05 08:12 PM
Member since Jan 25th 2005
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#86751, "RE: Simple Injectors Question"
In response to Reply # 3




          

man, i love it when something that i would think rather logical, turns to be true. Like i said, i assumed all of that in the 1st place, i simply wanted to make sure i was right.

  

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