Like topic says, how hard would it be to get 880cc injectors to work with an all motor set up?
I'm building the car for turbo, but want to run it all motor for time being. I had 450cc injectors befroe so the resistor box is all wired in and I'm lazy to undo them.

It is a brand new ls/vtec motor, running hondata s200. Breaking it in on the dyno.


Modified by AzN_Flava at 9:36 PM 2/13/2005

 

since you already have hondata it shouldent be a problem running those 880's for N/A before you go turbo.

you just need to have it tuned for those injectors........

 

idle will be a lil shitty having the big injectors, u can pull the fuel but they still runn funny

 

Stupid question, but can those injectors run a duty cycle low enough to idle decently? I suppose you could lower the fuel pressure.

 

I'm not sure that lowering the fuel pressure is a good theoretical solution. It might work, but theoretically, lowering the fuel pressure will hurt the atomization.

You're better off disabling closed-loop and letting it idle richer than 14.7:1 to 15.0:1...maybe something closer to 14.0:1 to 13.5:1, depending on what gets you the best results.

Then again, you might not have any problems with getting it to idle at stoichiometric fuel mixtures, and that would make life easier on you.

 

Yeah, I thought about that for the fuel pressure, making it a last resort bandaid. Try it and see how they idle, i guess. Might have to raise the idle a little, but a good experiment none the less.

 

ah okay interesting, i just heard a local tunner say that its too big of an injector for n/a set up and will wash my rings or walls down (becuase its a fresh built motor). Breaking it in on the dyno, so i'll talk with the tunner again.

 

if tuned right you wont have any problems

we usually stick 750cc injectors in everything b/c they are only a few bux more than 440's or 550's

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDogg &raquo;</TD></TR><TR><TD CLASS="quote">if tuned right you wont have any problems

we usually stick 750cc injectors in everything b/c they are only a few bux more than 440's or 550's</TD></TR></TABLE>
kool im glad, cuz my friend says i'll be running at like 25% duty cycle or less and my fuel come out like **** and ruin the rings cuz its a fresh new motor.

 

One issue with anything larger than 550cc is the range of the pulsewidth. Often times injectors that large do not operate properly at low pulsewidths like the ECU commands at idle RPMs.

550 is a good size injector. I am running those currently and am very happy.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DC5Dawg &raquo;</TD></TR><TR><TD CLASS="quote">One issue with anything larger than 550cc is the range of the pulsewidth. Often times injectors that large do not operate properly at low pulsewidths like the ECU commands at idle RPMs.

550 is a good size injector. I am running those currently and am very happy. </TD></TR></TABLE>

i hate to tell you, but they do work unless you have a plain shitty injector. i have done several cars with 1000cc injectors, idles and drives like a normal honda should

 

No, I don't have shitty injectors, I have just looked at the pulsewidth command at idle and what the operating range of the injectors are. There are plenty of factors of course, but these are things to consider when selecting an injector.

 

well i guess im gonna be using 880cc injectors

 

if you're gonna change the map around witht he turbo setup later on, then jsut stick with what you have ... unless you're gonna use a hondata 2 or 3bar map and just tune the 0 load points ...

same thing goes for timing maps ... why complicate things when you can jsut keep it simple ? whats the advantage with putting mileage on the injectors now running all motor when you can save them to run when you boost later on ?

Unless you're real good with hondata or have someone who is real good help you then i say stick with how it is.

Greg