ApexI S-AFC Installed Questions and Help :)

[Turbo Habanero]

Ok so i installed the Apexi tonight after i got off work car is running good started right up after i put it in.

I followed this guide i found on here.

http://www.supramania.com/forums/showthread.php?5485-HKS-SAFR-APEXi-SAFC-amp-NEO-wiring-installation

Everything seems to be working fine except the Air Flow % and Correction % doesn't ever change from 0 like its not being Read?
Also the pressure reading stays at -760 and does not move

I bought it used so i do not have the Directions i have not messed with the tuning part at all.

RPM signal
Throttle Signal
Karman all seem to be working


My wideband goes in the car tomorrow.

Any thoughts would be great or help as to where the setting should be.

So far i just switched it to Karmen and set it to 6cylinder type with the THR arrow pointed up to the right.(if that makes any sense to you lol)

 

[Devin LeBlanc]

Correction % will never change unless you add or take fuel away in the fuel settings table

 

[Turbo Habanero]

Correction % will never change unless you add or take fuel away in the fuel settings table

ok awesome thanks so the others i just have something not connected right? any idea whitch wire it is if thats the case?

 

[Devin LeBlanc]

You won't get a pressure reading because its not a map based setup.

 

[Turbo Habanero]

Thanks Devin really appreciate it.

 

[Turbo Habanero]

So after doing some looking around on AFR's for the 7M i found that a good Street tune ratio for under boost is 11.5:1

I was wondering what's a good ratio at idle?

And curious on what 7M's run normally assuming there running good and how much power can ya make with a good AFR.. '

Just trying to learn about tunning and how to make SAFE power

 

[Devin LeBlanc]

You don't want to touch any of the lo throttle map. Do a search on VF and what it means and how to use it while tuning. Set your Lo and Hi points in the SAFC to 74-75% You can only tune the Hi throttle on the 7M ECU as the TCCS will take over control and your tune will be all messed up once it adjusts VF.

Normal Idle/Cruise will be 14.5-15.2 bouncing back, This is the O2 sensor giving voltage feedback to the ECU to adjust fuel.

 

[Turbo Habanero]

So i did a little l
Searching and saw a lot of don't tune by vf signal and such. Not really knowing anything about this stuff ill keep reading but i did find this witch helped on understanding vf signal so for anyone else who doesn't know here ya go.


Think of the Vf signal as a peak inside your ECU. At a glance, you can see how hard your ECU is trying to compensate for any discrepancies between the signals it receives from the AFM, TPS, water temp, air temp, and engine speed (RPM), and the preset values it has stored within it's little silicon brain. For example, if you've cranked up the boost and haven't made any other adjustments, the engine is going to run lean. The ECU will be somewhat aware that things aren't what they should be --engine is running hotter, AFM is flowing more air for a given throttle plate angle (TPS value) than it expects, etc. The ECU will try to compensate, and the extent of this compensation will be shown, in gross terms, by the value of the Vf signal. Since the Vf signal only comes in five sizes, the true extent of the ECU's compensation can't be known by this signal alone. It should, however, be enough to point out obvious problems (if they weren't already apparent), such as a need for bigger injectors, a need to change the AFM spring tension, or a need to turn down the boost. It can also tell you if your ECU's fuel table is way off the mark.