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quick question on what to use

Old 08-06-2008, 09:23 PM
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Default quick question on what to use

ok the car is a 99 sentra with a ga16de engine
the few not to expensive and possible options i thought of are Safc and bigger injectors, FMU and stock injectors with low boost, or extra injector controller with a charge pipe mounted injector.
FMU cheapest but probably the worst
Safc and larger injectors is about the same price as eic and 1 injector but which is better i have no idea.
this is for 6-7 psi on stock motor and i believe stock injectors are really small and i will also be upgrading the fuel pump no matter what management i use.
if anyone has any better ideas then the ones posted for around the same price lmk
Thanks for any help in advance
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Old 08-08-2008, 08:02 PM
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Default Re: quick question on what to use

if you are runnig that low boost i would just go wth the FMU.

i have never tried athe other 2 methods, but the safc sounds better than an extra injector
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Old 08-09-2008, 12:56 AM
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Default Re: quick question on what to use

Yea i never used any of them except for FMU and that didnt work as well i i was hoping for but it didnt blow up so thats a plus lol
Thanx
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Old 08-09-2008, 01:03 AM
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Default Re: quick question on what to use

im not a fan of the extra injector setup. I dont see how the extra fuel can be evenly distrubuted across all 4 cylinders when its comming form the charge pipe...it just sounds like a problem waiting to happen.
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Old 08-09-2008, 09:25 AM
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Default Re: quick question on what to use

TBI is pretty much the same thing. It works fine but the problem is that its on or off. If you could have control over it then it would be ok. It still wouldn't be ideal cause you do get more fuel to some cylinders than others, but it would be better
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Old 08-09-2008, 10:25 AM
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Default Re: quick question on what to use

Originally Posted by kablammyman
im not a fan of the extra injector setup. I dont see how the extra fuel can be evenly distrubuted across all 4 cylinders when its comming form the charge pipe...it just sounds like a problem waiting to happen.
If you think fuel distribution is the issue, look at the medium it travels in. Air distribution is really variable between cylinders... if you tune to a safe AFR number but it's an average of 2-3 really rich cylinders offset by one really lean cylinder wel guess what? You're fucked for exactly the same reasons.

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Old 08-09-2008, 10:27 AM
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Default Re: quick question on what to use

Originally Posted by Joseph Davis
If you think fuel distribution is the issue, look at the medium it travels in. Air distribution is really variable between cylinders... if you tune to a safe AFR number but it's an average of 2-3 really rich cylinders offset by one really lean cylinder wel guess what? You're fucked for exactly the same reasons.

Welcome to cars. If there's anything else you need disillusioning about, let me know. I'm chock full of bitter wisdom.
GOOD POINT
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Old 08-09-2008, 10:33 AM
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Default Re: quick question on what to use

Thanks, OCZC schooled me on that back in '03.
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Old 08-10-2008, 03:59 AM
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Default Re: quick question on what to use

Originally Posted by Joseph Davis
If you think fuel distribution is the issue, look at the medium it travels in. Air distribution is really variable between cylinders... if you tune to a safe AFR number but it's an average of 2-3 really rich cylinders offset by one really lean cylinder wel guess what? You're fucked for exactly the same reasons.

Welcome to cars. If there's anything else you need disillusioning about, let me know. I'm chock full of bitter wisdom.
how do you know if this is happening? check the plugs? my dad has some sort of scope thing that he looks at plugs with... should i do the same? you need to turn the car off right after run/pull correct?
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Old 08-10-2008, 08:54 AM
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Default Re: quick question on what to use

you run it wide open and shut it off with it still full throttle, then look at the plugs. You will have to do it somewhere where you can run it fast and have room to pull of the road.
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