difference between ecu's
18 May 2006, 02:09 PM
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Originally Posted by dj219957
U8 or W6 ECU is standard 1993/1994 WRX
2C is standard 1994 WRX (a bit of a cross-over between U8/W6 and the Z4)
Z4 ECU is 1994-1996 WRX
STi ECU was SA
STi RA ECU was SB
STi 2 ECU was 6K
STi 2 RA ECU was 7K
WRX RA ECU are W9 or Z5
WRX Wagon 1C, 3B, V9
UK/Euro GT/Aus WRX Saloon & Wagon V7, 7D, 6D
2C is standard 1994 WRX (a bit of a cross-over between U8/W6 and the Z4)
Z4 ECU is 1994-1996 WRX
STi ECU was SA
STi RA ECU was SB
STi 2 ECU was 6K
STi 2 RA ECU was 7K
WRX RA ECU are W9 or Z5
WRX Wagon 1C, 3B, V9
UK/Euro GT/Aus WRX Saloon & Wagon V7, 7D, 6D
Originally Posted by Scott.T
Z4, Z5, 6K and 7K all run pretty good fuel/ignition maps. Alot better/cleaner then the earlier ECU. However 6K and 7K are from STi, so would use with caution in a non STi due to the more aggressive timing.
Simon
18 May 2006, 03:54 PM
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so its not just the z4 which is good for only using sul its the z4,z5,6k,7k 
as they all have the same fuel maps ,is about right ,does anybody know when the japs went to higher octane fuel?,also what octane was it before?
thanks matt
as they all have the same fuel maps ,is about right ,does anybody know when the japs went to higher octane fuel?,also what octane was it before?thanks matt
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