Ok I'm using the injectors and pump that come with the Hahn stage 2, is it even worth putting the Cartech Begi FMU that comes with the kit in since I'm gonna be tuned with HPTuners? I don't like how the Begi looks and I'd rather not use it and just sell the thing but if its better to have it even with HPT I will use it. Any input on what to do.

as long as you have a wideband, I would say leave the FMU off...... it will just make it harder to get the car tuned in the long run.




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I still have it on, so heres what I'm going to be doing...

Turn the FMU down a bit
Tune the VE
Turn it down a bit
Tune the VE
Repeat until the fuel is perfect

Will be interesting to get into tuning the VE once I get my car back, its not the easiest thing to do. I will have some histograms made up so people can use them for tuning.





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shifted has the right idea


but once you get the fuel perfect , then pull the fmu off

honestly i am using the portfueler for the fuel part and using the hp tuners for the stock pcm and innovative wideband i know its more money but done the research the portfueler is a great investment so just my opinion.

the only fuel mods i have is bigger injectors, afpr, and hptuners... and i have perfect numbers as of last nights tuning thanks to shifted's advice (i was illicit on aim, remember?) but yea, i think, or i know . . . . atleast from my experience that you can definitely leave the fmu off


|Forged 8.9:1 Wiseco Pistons|Forged Eagle Rods|HPTuners|60trim|Tial Wastegate|
|Precision Intercooler|2.5" Exhaust|2.5" Charge Pipes|630CC Mototron Injectors|
|Stock: Fuel Pump, Transmission, Manifold, TB, Head, Head Gasket, Ignition, Suspension...|