ok guys....i aware taht this is all-motor channel, so im not sure if this question will be relevant in here. First, im all-motor freak like you all do

im currently have gsr:
as some searched infor i have read in the past, i know that civic ex, si, ls, rs, gs, gsr, t-r has injectors of 240cc.

and a person told me that the 240cc can support a good 170-190whp range. Just to make sure that the information i got is firm, and here i'll will ask again

for my gsr, when should i upgrade my stock fuel system regarless of my currently hp. my goal is trying to reach 240-270whp all-motor

thanx

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by yeegsr &raquo;</TD></TR><TR><TD CLASS="quote">my goal is trying to reach 240-270whp all-motor

thanx</TD></TR></TABLE> eek a little high, you'll likely need to upgrade to some DSM 450's or some new rc 310's.

 

hell yea thats high. rc 310's

 

my motor is hella healthy. Not to be bragging, but i think can i get at least 220whp just just head-work. The usual stuff like p&p, cams etc...

my motor is putting 175 with just h/i/e/m GSR96 bolt-ons, this is my current hp. And if i going with DSM 450s or RC 310 with FPR will good if adjusted properly right?

 

well thats great man, but i think &gt;220whp is just a little unrealistic, k-series would have me more convinced. Anyway some easy and cheap dsm 450's or new rc 310's will suffice for sure.

 

Well, when I was on the dyno, my stock B16 injectors were leaning out the fuel up top in the RPM's, and I'm only making 165whp.

They swapped 'em out for RC 370's, only because they didn't have any 310's in stock.

 

i have used stock injectors too, and past 200whp with some fuel pressure backin them up.

no way in hell u are gonna max out ur injectors with your current setup.

IMO itll take a 2.0 before i even think of upping injector, ill keep increasing fuel pressure

 

i have 290cc's in my car, GSR 11.5:1 , and my fuel pump went out in vtec, it lost 9 psi in pressure, so im switching the pump out. You can benifit from 310s if your pushing 200-220whp IMO, but make sure you have the pump to go with it. 450s are redunkulous in an all motor car IMO.

 

iam pushing 230+ whp and iam on 270 but i need to upgrade i can get more power out of it, but iam just showing you that you can push some power from not so big injectors.

 

Its better to go just a little too big so your tuner has some room to play with.

 

yeah, i agree, i would rather have to much fuel ,rather than not enough if you know what im saying.

 

 

here is the conclusion for this thread:

Some recommended DSM450 or RC 310 - 370, when needed
Some say, stock injector is good for my current setup and not neccessary to get an upgrade for now. Although, its good to have it upgrade.

My new question:
i'm planning to push 190whp-200 in the next month or 2. Based on thread answer, i got my third solution of getting FPR with stock Injectors. Will this be fine for now?

 

i have some Rc 310's for sale with 500 miles asking 200 shipped

 

I maxxed out 310's w/ a B-series.

 

bump

 

RC 310-370CC injectors for sale cheap at http://jhpusa.com/catalog/index.php I'm also worrying about what I'm going to do for a fuel system as far as fuel pump etc goes when I finally get my engine put into my 93 Civic Si. Does anyone happen to know what the stock fuel pump can put out in a 93 Civic Si? I've already got the engine built with RC310's stock fuel rail and FPR for now but plan on ordering fuel rail, pump, filter, FPR and tons of other **** that I need to tune and get the engine in my car. I personally think you should pick up some RC 310's+

 

how do u know when the injectors r maxed out?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mattspivey &raquo;</TD></TR><TR><TD CLASS="quote">how do u know when the injectors r maxed out?</TD></TR></TABLE>

some said "during the dyno tuning if the hp curve of the top end flatten out is a sympton of fuel is cutting-out." logically, it sounds true.

 

Injector on time AND rpm, and you can determine duty cycle. Too high duty cycle and you need more injector flow. Notice its dependant on rpm and time, so the same size injector could see similar duty cycles on a B20 at 7000 as a B16 at 10,000. That was just a hypothetical example to illustrate the dependancy of "maxing out an injector". You can increase injector flow by simply upping fuel pressure with a AFPR or run larger injectors. I would bolt on an AFPR and up the fuel pressure, this will buy you the fuel flow you need for most street B's

 

For all those who said they'd rather "have too much fuel than too little," have fun when you wash out your rings and have 0 compression.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by xTravBx &raquo;</TD></TR><TR><TD CLASS="quote">For all those who said they'd rather "have too much fuel than too little," have fun when you wash out your rings and have 0 compression. </TD></TR></TABLE>

Please elaborate. Why would properly tuned 310's or 450's be any different that 240'c? On any given engine, if tuned properly the fuel flow would be the same, regardless of injector size, assuming the injectors can physically deliever as much or as little fuel as needed?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BryanPendleton &raquo;</TD></TR><TR><TD CLASS="quote">

Please elaborate. Why would properly tuned 310's or 450's be any different that 240'c? On any given engine, if tuned properly the fuel flow would be the same, regardless of injector size, assuming the injectors can physically deliever as much or as little fuel as needed?</TD></TR></TABLE>

Pls elaborate. I am running 310cc's with a 255hp pump. I am just breaking in my motor, and I am running really rich, but I am only at 45psi. I really need to get this motor tuned badly, but I dont want to wash the rings out??

 

Honda 92-95 H22A injectors are peak and hold and are rated at 345 CC. a cheaper alternative to RC's

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BryanPendleton &raquo;</TD></TR><TR><TD CLASS="quote">

Please elaborate. Why would properly tuned 310's or 450's be any different that 240'c? On any given engine, if tuned properly the fuel flow would be the same, regardless of injector size, assuming the injectors can physically deliever as much or as little fuel as needed?</TD></TR></TABLE>

Properly tuned would not wash out rings - but too much fuel would wash out rings. As I said in the post ... "For all those who said they'd rather 'have too much fuel than too little....'" - I did not mention those who are tuned properly.

BUT - depending on what you're tuning with, you can't always turn down the duty cycle of the injectors. An SAFC can remove some fuel, but not turn down duty - so you can still be adding way too much fuel, based on injector CC's alone.

No matter what, too much fuel -will- wash out your rings.