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Old 11-24-2017, 11:45 AM   #1
racesubi123
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Default Hpx Maf 05 Sti

I am trying to find out if anyone has used a blow through HPX MAF on an 05 STI. I would like to keep my factory ecu and tune through ECU FLASH or something similar. Can this be done, if so how? Has anyone done it?
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Old 11-24-2017, 12:15 PM   #2
motorbykemike
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more details on the setup/combo would help


I used a fmic perrin blow through maf tube briefly with not so great results


but why not just go sd or hybrid maf/sd?
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Old 11-24-2017, 02:54 PM   #3
NSFW
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05 Stage Free LGT
ATP 3076, 6MT, AVO FMIC

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I haven't seen it tried before but I'm curious now. The 0-5v signal should be compatible with the stock MAF. If the IAT signal isn't compatible, you could just use a GM IAT sensor - that's a fairly common swap for Subarus and wouldn't be much extra work.

I also tried blow-through with the stock sensor, also with poor results. But HPX is available with a sensor+housing combo that might fix the issues that have come up with so many blow-through setups.
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