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Hi, I have a 2010 STI and am working on scaling the injectors (Injector Dynamics 1050x), I'm not sure which fuel pressure row data to use. This is listed on their site:
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ID1050-XDS Dynamic Flow Data
Fuel Pressure Offset Slope
(psid) (µsec) (cc/min)
8 V 10 V 12 V 14 V 16 V
40 1920 1410 1115 920 790 1020
43.5 1955 1425 1125 925 795 1065
45 1970 1435 1130 930 800 1085
50 2025 1475 1160 955 825 1145
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I know the stock Subaru is 43.5 psi, but I have an aftermarket fuel pump (DEATSCHWERKS DW300C SERIES). This pump has a 28% flow increase but the pressure states that it's 40psi: [Flow rate of 340LPH (40psi, 13.5v)].
I also have a Cobb Fuel Pressure Regulator installed which theoretically should deliver the same pressure as stock (43 psi). I've heard from several people that the actual pump doesn't dictate the pressure delivered to the rail, or injectors but the regulator. So I'm not sure which value to use as the base, the 40 psi or 43 psi.
I understand that the manufacturer's scaling and flow data will still need to be tweaked as explained in the course but just wondering what values I should use as a starting point.
You want to set it to what the ECU is expecting, probably 43.5 like the stock setup.
Got it, that's what I suspected and thanks for the confirmation.
