Im running s300 on my built gsr hatch sc34 and I just wired up an innovate LC1 with moates.net o-meter.

I tried starting the motor with a basemap (that i made) and the injector sizing at 1000cc (RC injectors) and it would barely run. I changed it to 800 and I was getting 18-19AFR. I cranked it down to 700 and it was in the 17s, then down to 600, then 500... then it started running good.

I added boost tables and it was running great. I didn't change any of the tables and it was running perfect and pulling hard. AFR was 14-15 normal driving and low 12s under boost. Does anybody have any ideas why I had to set my injector size to 500??? Fuel pressure is actually higher than stock, and I have 10:1 compression! I got my injectors flow tested at 1001cc!


Modified by ham at 10:24 PM 9/9/2007

 

I had the same problem, the injector scaling is out to lunch, I guess it's pretty common with the s300

 

ok that makes me feel a little better.

 

its called "get it tuned"

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mike93eh2 &raquo;</TD></TR><TR><TD CLASS="quote">its called "get it tuned"

</TD></TR></TABLE>

what the hell is that supposed to mean? i do all of my own tuning, and have been for years.

 

that dude is always bitchy. probably because he owns a D series..

 

what is your set up?? i had the same iusse with my s300 but mess with it alittle and got it tune runs good now. go to hondata.com an download a map from there that where i got mine from.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SwappedTURBOegg &raquo;</TD></TR><TR><TD CLASS="quote">that dude is always bitchy. probably because he owns a D series..</TD></TR></TABLE>

lol. thats cold

 

you have to add to overall fuel trim eric

 

i guess it doesnt matter, it runs awesome, i was just wondering why it was so off.

built d series guys are always bitchy. maybe they are jealous because guys with stock boosted b series make more power than their fully built d series. remember my post about my dyno numbers? hahha

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ham &raquo;</TD></TR><TR><TD CLASS="quote">
I tried starting the motor with a basemap and the injector sizing at 1000cc</TD></TR></TABLE>

that doesnt sound like its tuned to me.

whatever guys..

 

which injector value were you changing sounds like you might have been changing the top value instead of the bottom value.

all hondata does is take the top value(what you stock injector are in your case I believe it's 240cc) and then takes the bottom number(what injectors are really in the car) and tryes to guess how to adjust the overall fuel trim.

if you were changing the top number I could see it producing a negative number in the calculation maybe thats cause the problems.

 

don't worry abt it. i have the same problem. i have 1600's and i had to set them to 800's to get it to turn on and idle and stuff. don't see it being a problem besides the injector duty being off but who cares

 

Running into the same problem now. Posting on the hondata forums they are telling me changing the injector size does not modify the overall fuel trim.

If it does not change the fuel trim how do you know what percentage to change all the tables to. Do you just keep uping the whole table until you get consistant A/R at idle and then start from there?

-platinum.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mike93eh2 &raquo;</TD></TR><TR><TD CLASS="quote">

that doesnt sound like its tuned to me.

whatever guys..</TD></TR></TABLE>

youre right... i just started tuning yesterday. i started with a basemap (that i created) and im still working on it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ham &raquo;</TD></TR><TR><TD CLASS="quote">
built d series guys are always bitchy. maybe they are jealous because guys with stock boosted b series make more power than their fully built d series. remember my post about my dyno numbers? hahha</TD></TR></TABLE>

Heeey now, don't lump us all together!

I normally don't even bother scaling, maybe take out a little bit of fuel throughout the entire map if there are really big injectors in. A car will start when it's rich and continue to run, which lets you change it in realtime while it's running and get yourself moving quicker, lean is a different story.

Tune to your wideband, not to your ghost values.

 

You're supposed to set the initial injector scaling, then you add a value to the overall fuel trim until you get it runnin well.

my RC 750's are set to 20 overall fuel trim. Idles and runs fine. Doing it this way keeps the estiamted duty cycle more accurate, rather then scaling the overall fuel trim and throws the duty cycle out to lunch.

 

ok i see... instead of adjusting the overall fuel trim i just changed the injector size.

 

Good info Tchleung...

Is there a default scaling for people to use that dont have 750's. so 750 = 20%, 850= 25%, etc...

-platinum.

 

Yeah when I set the overall fuel trim to 0. The car idled at like 19:0 or leaner. wouldn't stay running lol. The value you enter is a percentage on top of your initial fuel injector sizing I belive.

I don't think there are any set overal trim adjustments as every injector manufacturer is different

 

my 780's are set to -1 overall fuel trim

 

pm me if you still need help

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bigbadboy &raquo;</TD></TR><TR><TD CLASS="quote">don't worry abt it. i have the same problem. i have 1600's and i had to set them to 800's to get it to turn on and idle and stuff. don't see it being a problem besides the injector duty being off but who cares</TD></TR></TABLE>

the s300 sucks at controlling 1600s even with an fjo driver.. at partial throttle at least . the injectors suck on the street in general.

1000 rcs are my first choice they run great

 

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

1000 rcs are my first choice they run great </TD></TR></TABLE>

yeah i swapped out the stock injectors for the rc1000s and i noticed no difference in drivability, it runs and drives perfect. this was not the case when i was running uber / crome or even an older stage 3 hondata.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mike93eh2 &raquo;</TD></TR><TR><TD CLASS="quote">my 780's are set to -1 overall fuel trim </TD></TR></TABLE>

If your over fuel trim is set to -1, is the fuel table adjusted to compensate?

I hear people doing it both ways..

-platinum