Here ya go Arabas
I had Dejon make me a new Cold IC and Intake to relocate my Maf. With the new turbo and bigger pipes, ic and external BOV, I was running into a couple of issues due to the reading of the Air Flow. So this is my new setup.
I got this idea from seeing numerous other people do it to resolve the same issues I was running into. It is supposed to be the optimal location for turbo upgrades, especially onces that don't recirculate like our stock one or the EFR.
I am going to quote someone more knowledgable than me from the following thread
http://www.solsticeforum.com/forum/f63/maf-relocation-completed-air-intake-completed-bov-install-completed-70125/If done correctly, the blow-through maf setup will be MORE accurate than the stock setup.
Jeb used my dimensions when he made up that charge tube. The reason for the size of the block is to put the sensor inlet in the exact right spot in the pipe. The maf correction table is what is used mostly for compensating for maf readings that do not match actual airflow properly at different rpm's and loads. If you have a properly set-up maf hardware install you won't have to skew the correction table that much. Both Jeb's and mine have the maf's in the same position, same diam tube and same size mounting block. I can tell you that both of our cars have a maf correction table that is WAY CLOSER to all 1's than the stock table. My correction table in the idle cells range from .99 to 1.01. Stock idle cells range from .92 to 1.05 to get an idle mixture that isn't even as well dialed in. My car with those corr. numbers will sit and idle a 0 STFT and 0 LTFT 90% of the time. Maf compensation table is also pretty flat, not a whole bunch of skewing on there either.
My point is Jeb's mount may look bigger than a lot of the aftermarket ones you all have seen, but that doesn't mean it doesn't work as well. The other huge factor in running a blow-through maf is latency. With the maf right after the air filter, the airflow going through at that point can be very different at any particular instant than what is going into the engine. Add in a big turbo compressor, big charge pipes and a big intercooler and it makes that delay worse. I can post up some logs when I get a chance to show everyone what I'm talking about. You can actually see the delay in reaction in maf readings. What that does is the computer is compensating for an airflow that isn't what it's actually running on, a split second later it finally gets that airflow, then has to compensate back. The most obvious symptom of this is idle surge and coastdown rpm drops and surges.
Class over, gotta go
