hey guys ... doing the hack with 440rc injectors. i have the fuel pressure set around 47psi wth no vacum.. and leaned out 39% - 40% , but i'm still running very rich.. am i doing something wrong??

 

have you checked out http://www.thedropshop.tv/vafc.htm ?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by queez &raquo;</TD></TR><TR><TD CLASS="quote">hey guys ... doing the hack with 440rc injectors. i have the fuel pressure set around 47psi wth no vacum.. and leaned out 39% - 40% , but i'm still running very rich.. am i doing something wrong??</TD></TR></TABLE>

might try -45%. i was running -40% but when i hopped on the dyno, the engine was running VERY rich. when the tuner leaned it out to -45%, the a/f rose to about 12:1.

 

using dsm 450's at about -35 all over, fpr set at 38 psi, still running rich
id suggest turnig down the fuel pressure to at least 40 psi

 

are you running an FMU? at full throttle you should run rich btw? are you putting out black smoke?

I'm running RC 440's aswell with a V-AFC and GM 3 bar map on 15 lbs. Works great with an FMU.

 

i am not running any fmu.. i'll try lowering my fuel pressure..
but i guess since i am running this rich without installing my warlboro fuel pump.. is it a good guess to say i might not need the fuel pump at all??

 

take it to a dyno tuner with wideband. they will adjust it. my settings range from -46 to -49 and still a tad on the rich side.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Type-GS-R-Turbo &raquo;</TD></TR><TR><TD CLASS="quote">are you running an FMU? at full throttle you should run rich btw? are you putting out black smoke?

I'm running RC 440's aswell with a V-AFC and GM 3 bar map on 15 lbs. Works great with an FMU.</TD></TR></TABLE>

Any probs or issues in installing the 3bar GM to the stock ECU??

 

What makes you think your running rich?

 

i have an auto meter a/f meter.. it used to run stoich , but now it is pinned rich, and i'm going through gas like crazy

 

if your using the afc, make sure all the settings are right, eg: sensor is pressure and 6 in and 6 out.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by queez &raquo;</TD></TR><TR><TD CLASS="quote">i have an auto meter a/f meter.. it used to run stoich , but now it is pinned rich, and i'm going through gas like crazy</TD></TR></TABLE>

I have the same setup as you but i'm using 450 cc inj and a fmu and stock pump.
Got the car on the dyno and I was very lean.
My auto meter a/f gauge was saying very rich.
I'm now going to get a 255lph in tank pump and a b&m fpr.
Get it on the dyno and find out whats wrong.

 

i have a walbro 250 and the pressure from the walbro is too much for the B&M to hold back...ive put two of them on there....

 

nope. There is a setting in the Apexi that converts the 3 bar signal to the stock honda signal. Read my thread on this exact topic:

https://honda-tech.com/zerothre...30825

 

Check the plugs.. best way to know what the hell is going on.