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View Full Version : ECU upgrade for MY93 pwhittle 03 September 2005, 18:05 I'd be interested to hear from anyone who has swapped the U8 ECU for a Z4/5 in a 93 WRX. What effects did you notice? Are the Z4/5s a better bet, or won't it be worth changing? cheers dj219957 03 September 2005, 18:29 Id defo say its worth it mate. The z4 gives better power, better boost control and runs better on uk fuel. Mine runs great on optimax alone. I swapped my 3B ecu and td04 for a z4 ecu and td05 turbo. Go for it. Andy I'd be interested to hear from anyone who has swapped the U8 ECU for a Z4/5 in a 93 WRX. What effects did you notice? Are the Z4/5s a better bet, or won't it be worth changing? cheers |