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

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

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

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.

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

Re: quick question on what to use
 

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.

Re: quick question on what to use
 

GOOD POINT :y

Re: quick question on what to use
 

Thanks, OCZC schooled me on that back in '03.

Re: quick question on what to use
 

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?

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.

Re: quick question on what to use
 

Yes. I also like to look at the piston surface.

Re: quick question on what to use
 

touche' ;) I get what you are saying.

So, what would you prefer for this setup? 4 larger injectors, or an extra injector?

Lets say price wasnt an issue, and the same ecu/piggyback has the ability either option, so the tuning process would be the same.

Re: quick question on what to use
 

I swear by individual cylinder trims. Being able to add a percent or two fuel, or yank a half a degree timing, to individual cylinders is vital for optimum performance AND longevity.

Re: quick question on what to use
 

i used a sds eci with out problems or a wideband back in the day keep turning up the fuel until it wont want to run smooth under boost then turn it back and notch and your set O0

Re: quick question on what to use
 

Yea from what i was reading on them some people used them in some high hp setups and they worked well and thats how they said to set it up on the sds website. it sounds easy and effective thats why i figured it would be a good way to go.