BorderM3

or what is involved?

I need some sort of fuel management for my turbo setup...

I put 450cc dsm injectors in and it runs soo rich at idle its barely idles.

If i use the stock 240cc i will have to run insane fuel pressure with the fmu just sounds risky to me.

I have a dsm fuel pump installed.

delslow94

the vafc hack is where you use the 450 cc injectors off of an eclipse turbo a resistor pack wired into your injector harness and finally a vafc to pull out tons of fuel. usually from idle to vtec engagement set the fuel to -40 and vtec to redline at -35. the low and high throttle numbers can be whatever you want because you will set your low and high fuel curves to above. this will help with your idle... wont allow you to get a map cel for the boost if you stay under 11 psi and keeps you a little rich so detonation is held to a minimum. but remember if you havent put in a resistor in your harness do so....the best site for showing how is the http://www.hondata.com they show how to wire in the resistor box. look for it on there im sure you'll find it.

racingsoul

is this only possible with 450cc and resister box? to what i have read on the hack, it should work with any injector below 550cc right? I'm a little bit confuse here.
the hack will not work if you don't have a resister box? isn't the resister box only needed if you have peak & hold injectors? so, does this mean that if I have saturated injectors, it won't work? please let me know cuz I'm trying to run my 440cc saturated injectors with this afc hack. thanks.

Kamin

you NEED THE RESISTOR BOX

delslow94

only way you wont fry your car.

10K2HVN

When i first saw this post i thought it said "KFC", LOL!!! sorry im hungry, at work, for 8 hrs with no lunch break!!! damn asian employers!!

youngkow

So you don't need a stand alone ems when you turbo charge your car, and if you just get the afc? Sorry if it sounds stupid.


[Modified by youngkow, 3:40 PM 11/11/2002]

RAWB

Check this out:

http://www.thedropshop.tv/vafc.htm

racingsoul

Could someone please explain why I need the resister box for this to work?
It sounds stupid but, resister box are only need for p&h injectors. To what I have read and understand about the afc hack, it's suppose to let u boost because you are leaning out the larger injectors to compensate for the map signals sent to the ecu. If that's the case, why does it matter if we are using p&h or saturated injectors? Larger injectors are larger injectors...
Such as you guys are using 450cc p&h injectors and I'm trying to use my 440cc saturated injectors. U guys are setting it around -30 to -35 with the 450; I'm trying to run it -27 to -30 with my 440. Anything lower then that give lots of power under normal driving but under boost, it leans out.
Here’s my setup:
High throttle
1-3K = -30
4-4.5K = -29
5-6K = -28
7-9K = -27
Low throttle
1-3K = -40
4-4.5K = -35
5-6K = -30
7-9K = -29
Throttle point (matters only for switch over, that's why I have my low and high throttle set like that)
48%, 49%
If I had it like 98, 99%... it runs lean cause I'm still in my low throttle settings until my TPS hits 99%.
My map signals are good, I have positive signal under boost, I also have a J&S to dial back timing and it pulls timing like hell every time I run lean. Anyways, I know it doesn't work already but I still like to understand the "why it doesn't work" with the saturated injectors. Please reply if you know why. Thanks.

racerxadam

you only need the resistor box if you are using peak and hold injectors. The easy way to distinguish peak and hold from saturated is to measure the resistance between the terminals. The peak and hold ones should be around 2-3 ohms and the saturated ones should be around 12-13 ohms. The reason for the resistor box is the honda ecu's are designed to drive high impedance injectors but most high flow injectors are low impedance.

racingsoul

I know that, I was just wondering why people are telling me why I have to use a resister box to make the afc hack work? I know that resister box are only need if you are using p&h injectors. I have the RC440cc saturated tho and I thought that afc hack should work just like any other. But for some reason it doesn't. So, when I ask about it, poeple tell me that it's because I'm using saturated injectors. afc hack will only work with p&h injectors w/ resister box. My question is why so? both are larger injectors, so why does it only work with the p&h and not the saturated injectors?

racerxadam

have you actually tried it and it doesn't work? it should make absolutely no difference. all the resistor box does is make the ecu think that it is driving saturated injectors. as long as the injectors have the same flow ratings there is no theoretical basis that the hack will act any different

b18cx

Food for thought. RC saturated injectors will test 16~17 ohms. Stock ecu was designed for ~12ohm injectors. With the hack, the RC's might not work. Just an idea.