Ok if im running over sized injectors, with other fuel parts being stock.
Could the injectors harm anything or make my fuel pump go out?

Im asking becuase the pump did go out and trying to figure out if the
injectors could have caused it.

 

Edit - Corrected myself a couple of posts down.

Anyone feel free to correct me on that ^^


Modified by dr_latino999 at 12:54 AM 11/13/2006

 

what injectors are you running? please tell me you tuned it. if you throw in bigger injectors such as DSM 440's on your car without a tune it would flood the car. the ecu tells how much the injectors should open but the setting in a stock ecu is for 240cc's. let us know what injectors you got and what your running and we can help you with more information.

 

once again...i could be wrong, but i don't believe larger injectors stay open longer, they just have the ability to stay open longer and flow more volume of fuel than factory injectors at 100% duty cycle....They have larger internal volume and inductance coils

So I don't believe they could harm a fuel pump...

 

550 injectors on a non tuned p28 in a gsr with new valve train,
i/h/e
pushing about 190hp. ( i think)

still not sure how to properly tune the car, or what but yeah my
fuel pump gave out and im just wondering if thats a cause or atleast
a factor in it.

 

i would say a big factor. i know if you have a turbo car and if you go over the map sensor the fuel pump will cut off purpusly it might have the same effect here. deffinutly get a tune or put stock injectors back in.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dr_latino999 &raquo;</TD></TR><TR><TD CLASS="quote">No, bigger injectors just stay open longer allowing more fuel out, which causes a drop in rail pressure with the stock pump.

Anyone feel free to correct me on that ^^</TD></TR></TABLE> Ah fudge 'ems, I just found a flaw in my tired logic. It sounded good in my head at the time.<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nappyroots827 &raquo;</TD></TR><TR><TD CLASS="quote"> flow more volume of fuel than factory injectors at 100% duty cycle....They have larger internal volume and inductance coils

So I don't believe they could harm a fuel pump...</TD></TR></TABLE>

Larger then stock injectors won't kill a pump, but they sure will kill your idle, your gas mileage, and possibly your cylinder walls.

 

cylinder walls? never heard of that one. care to expand.

but why would bigger injectors allow more fuel to enter the motor
while the fuel pump only pumps so much, and the original regulator
only allows so much fuel. Correct me if im wrong. So as long as
I keep the fuel rail stock I should be fine shouldn't I?

 

the fuel pump pumps so much, but the time the injector is open is how much fuel is getting sprayed in. your stock setup is 250cc now your running 550cc you need to shortin the time of the injectors being open. without doing so to much fuel comes in. making your car run Ritch and flooding the motor.

 

You wash away the oil in your cylinders thus causing scratches. Why would you put 550's on?

 

you put 550's on a stock engine?

wtf?

 

how could I make the injectors not stay open as long.

and what d16z6 injectors work?

are ls and gsr and b16 injectors the same?

 

getting the car tuned will beable to close the injector time. im not to sure about LS but i thinkg b16 and GSR are the same but im not positive. look into chipping your ecu and tunning it with Crome. or spend the money and get Hondata your choice. thats the only way unless you replace them with stock injectors.

 

d16z6 injectors does anybody know about them. Can I use them?

 

ED/EF (minus hf), EG, 86-89 accord, EK y8, and some others i think, are all 235cc injectors and will all work, some with resistor boxes some without and some have different plug styles but can all be made to work, if you have your factory ED/EF setup right now, your best bet is Crx Si, or Civic Ex, or 86-89 Accord injectors (same part number as crx/civic)

 

ive always heard there 240cc. where did you hear 235cc?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nappyroots827 &raquo;</TD></TR><TR><TD CLASS="quote">ED/EF (minus hf), EG, 86-89 accord, EK y8, and some others i think, are all 235cc injectors and will all work, some with resistor boxes some without and some have different plug styles but can all be made to work, if you have your factory ED/EF setup right now, your best bet is Crx Si, or Civic Ex, or 86-89 Accord injectors (same part number as crx/civic)</TD></TR></TABLE>

great right up. yea i beleave its OBD-0 that runs resistor boxes and 92 and up OBD-1 dont need resistor boxes. also the EK Y8 have a clip on injector unlike regular injectors where you have to pop out that metal paper clip thing.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by K20EF8Dx &raquo;</TD></TR><TR><TD CLASS="quote">great right up. yea i beleave its OBD-0 that runs resistor boxes and 92 and up OBD-1 dont need resistor boxes.</TD></TR></TABLE> Well, to the most point that is true, I know OBD-1 Accords/Preludes had resistor boxes.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dr_latino999 &raquo;</TD></TR><TR><TD CLASS="quote"> Well, to the most point that is true, I know OBD-1 Accords/Preludes had resistor boxes.</TD></TR></TABLE>
but after 92 they didnt i have a 90 accord and it does and my buddy has a 93 without 1.

 

ok well I havnt finished doing everything. But ive sold my motor with the injectors.
But I do have d16z6 which dont use the resistor box. So that should work fine if I
dont use my resisotor box right?


Oh and can anybody point of the benefits of using or not using the resister box. Or when id want to and when I wouldn't.
Whats most recommended? Or whats the rule of thumb.

 

if you are running d16z6 injectors you DO NOT need the resisitor box.

i am almost positive that preludes ran resistor boxes on past 92.

and as stated running rich will ruin your motor washing off the oil on it scratching up the wall.

if you are running high horse power 780cc injectors or more the peak and hold injectors work better as the name stats its peaks and it holds its flow. blah i cant explain it every well so someone else chime in.

oh ps: gsr with I|H|E will net you about 160 hp

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dr_latino999 &raquo;</TD></TR><TR><TD CLASS="quote"> Larger then stock injectors won't kill a pump, but they sure will kill your idle, your gas mileage, and possibly your cylinder walls.</TD></TR></TABLE>
you can get a walbro 255 lph fuel pump off of ebay if you want that should definately help. Just remember that ebay isn't really the best place to get parts like that.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by more hp &raquo;</TD></TR><TR><TD CLASS="quote">you can get a walbro 255 lph fuel pump off of ebay if you want that should definately help. Just remember that ebay isn't really the best place to get parts like that.</TD></TR></TABLE>

he probably just shouldn't run 550cc injectors, haha

and to as the above guy said about chiming in about the injectors and how they work...
peak and hold injectors like he stated, they build pressure and when they open, they stay open the same amount based on the time set by all the sensors..peak and hold injectors are the ones that use the resistor box...
saturated injectors (non-resistor) basically fill up with fuel to the pressure of your system, and they basically store the fuel inside the injector a certain pressure until it opens, and the valve varies to give you better spray and atomization as the pressure drops.

Atleast that is my understanding of how they work...feel free to correct me if im wrong...But as far as i know, saturated injectors are more economical, but peak and hold are better for high performance applications....

so in my honest opinion, the best injectors for you to use are the Y8 injectors, because the clips are so much easier to deal with, and you don't have to mess with a resistor box, one less thing to go wrong...

 

If you use saturated with a resistor box you will burn the injector packs on your ECU, if you use peak and hold without a resistor box you will burn the injector packs on your ECU.

So dont mess with things that arent broken or dont need to be upgraded. And almost all honda injectors are 240's unless its a NSX or S2000 or other cars then Im not sure. But GSR, ITR, LS, D15B, D16A's, are all 240's, some are peak and hold some are saturated, but they are ALL 240!

 

how much power can you safely put out on the stock 240 injectors?

and what are the benefints of the saturated vs. peak fuel injectors.
When would I want to use one vs. the other.