The truth about the afc hack!!!!!!!
08-10-2003, 11:56 PM
#81
1.0 BAR
Join Date: Mar 2003
Posts: 432
Re:The truth about the afc hack!!!!!!!
I said that assuming that you do not have a built engine as %90 of us here don't, especially if you're using the AFC hack. These little honda engines were not designed for boost and don't have the cooling to deal with the extra heat for very long. Purpose built turbo engines have larger oil galleys and better coolant flow to deal with the extra heat. 15 seconds is a long time to be at full throttle anyways.
08-11-2003, 01:17 AM
#82
1.0 BAR
Join Date: May 2003
Posts: 517
Re:The truth about the afc hack!!!!!!!
Originally Posted by Chacko
I don't know if this was already mentioned in this thread or not. But another problem with the Hondas and boost is simply that unless your routing your blow off air back into the charge piping before the turbo, youre MAP sensor has told the ECU to expect X amount of pressure in front of the T-body but this pressure is suddenly gone.
Anyone else have those really f*d up idles where the meter bounces around? Well hey this is most likely your culprit.
Its true that proper tuning can prevent this, and any ECU thats designed to know that when you hit vacuum in the engine after going into boost, can ignore the old MAP reading.
Anyways, this is just an idea of what may be causing those erratic idles and another reason why the AFC hack isn't the best way to go necessarily.
Anyone else have those really f*d up idles where the meter bounces around? Well hey this is most likely your culprit.
Its true that proper tuning can prevent this, and any ECU thats designed to know that when you hit vacuum in the engine after going into boost, can ignore the old MAP reading.
Anyways, this is just an idea of what may be causing those erratic idles and another reason why the AFC hack isn't the best way to go necessarily.
08-11-2003, 12:45 PM
#83
1.5 BAR
Join Date: Dec 2002
Posts: 1,495
Re:The truth about the afc hack!!!!!!!
Shadowrex, I believe the only way to fix it is to either make the MAP signal dropped (and you probably can't do this with GD) after vacuum is detected again or to run really rich/lean at the idle RPM.
08-12-2003, 09:59 PM
#85
1.5 BAR
Join Date: Dec 2002
Posts: 1,495
Re:The truth about the afc hack!!!!!!!
I am currently running 5-8 psi daily (5 in small gears, 8 in bigger). I've set the AFC in lo to -40% all the way across and -38% at hi all the way across.
My TH-Point is at 11-12%, I have stopped pinging under low acceleration after I lowered the TH-POINT
My TH-Point is at 11-12%, I have stopped pinging under low acceleration after I lowered the TH-POINT
08-12-2003, 10:45 PM
#86
0.0 BAR
Join Date: Jun 2003
Posts: 17
Re:The truth about the afc hack!!!!!!!
so many opinions...
so confused.
someone correct me....
parts needed:
450cc ingectors
resistor box
s-afc
*normal safc wiring?
*new fuel pump?
*fpr?
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this is good for 10 psi, yes?
can someone list ALL settings on the afc for use in this?
sorry about the point form but I want it plain and simple, no "well you could... OR you could..."
so confused.
someone correct me....
parts needed:
450cc ingectors
resistor box
s-afc
*normal safc wiring?
*new fuel pump?
*fpr?
---------------------
this is good for 10 psi, yes?
can someone list ALL settings on the afc for use in this?
sorry about the point form but I want it plain and simple, no "well you could... OR you could..."
08-13-2003, 10:33 PM
#87
0.0 BAR
Join Date: Feb 2003
Posts: 0
Re:The truth about the afc hack!!!!!!!
Uhm, speed density knows instantly that conditions in the intake manifold have changed, and modify the fuel accordingly in a timely fashion. It is MAF systems that go rich for a second when the throttle closes and the BOV goes off, IF the BOV is vented to atmosphere instead of before-turbo-after-MAF meter.
08-21-2003, 02:53 PM
#88
0.0 BAR
Join Date: Jul 2003
Posts: 3
Re:The truth about the afc hack!!!!!!!
Originally Posted by Dr.Boost
I'll explain this as good as I can. Since you said you were planning on running 10 psi and you are getting 450cc DSM injectors and plan on running the S-AFC, you will be fine. You would be running the same setup I have and it works great. You will not need a missing link. The missing link is basicaly a one way valve that mounts inbetween the map sensor and the throttle body. It prevents the map sensor from seeing boost and setting off the cel(check engine light). Lets say the map sensor normaly reads voltage from .50 volts-5.0 volts on a naturally aspirated engine. .50 volts being at idle and 5.0 volts being wide open throttle. When you add boost to the intake, the map sensor will be getting lets say 1.0 volts per pound of boost. The ecu sees the voltage as being too high and sends a cel. With the AFC hack you are taking the signal from the map sensor and lowering the voltage to compensate for the large injectors which in turn tricks the ecu into thinking it is supplying the stock injectors with the proper ammount of fuel. Therefore your ecu will not sence boost because the voltage has been "hacked" to fool the ecu into thinking everything is ok.
Can this be done by putting a compasitor or resistor between the map sensor and the ecu..
