Which ECU??
15 July 2005, 07:20 PM
#1
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Which ECU??
Can anybody please tell if my ECU is standard for my MY 93WRX or if not which it is??
I have a W6 on the sticker and it has Unisia Jecs Corporation on it.
I will get pics up soon as but any ideas??
Thanks
Iain
I have a W6 on the sticker and it has Unisia Jecs Corporation on it.
I will get pics up soon as but any ideas??
Thanks
Iain
01 August 2005, 01:29 PM
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Originally Posted by Delboy2
Early WRX/STi Saloons either have the 2C, U8, W6, W9 ECU - they have an 11.47psi boost target and a Fuel-cut of 14.57psi 
Cheers
Cheers
As I understand the early WRX/STI's could have 240 ps / 260 ps.
Do all these ecu's 2C, U8, W6 or W9 all have the same boost targets and fuel-cut off levels.
Thanks
Iain
01 August 2005, 03:27 PM
#7
Quote:
Boost Targets & Fuel-Cut Limits
WRX/STi Saloon ECU's 2C, U8, W6, W9 - As above, 11.47psi held to redline. Fuel-cut 14.57psi
WRX (1995/96) ECU Z4 - 12.71psi, dropping to 11.78psi @ 6600rpm. Fuel-cut 15.65psi.
UK/Aus/Euro ECU's V7, 7D and 6D - 11.47psi, dropping to 9.47psi at 6600rpm. With Fuel-cut @ 14.87psi
UK Prodive ECU - 13.33psi (peaks to 13.64 @ 5600rpm, drops to 12.71psi @ 6600rpm). Fuel-Cut 15.65psi.
STi RA (1996) ECU 7K - 13.17psi (peaks to 13.64psi @ 5800rpm). Fuel-Cut 15.96psi.
WRX Wagon ECU V9 - 10.55psi dropping to 6.84psi (starts to drop @ 5000rpm). Fuel-Cut 13.79psi
Z4 and UK Prodrive map are near identicle, with the Prodrive Map running slightly more boost.
IMHO the Z4 ECU is the best stock WRX ECU you can get, as it has much tidier fuel and igntion maps. Comparing it to the earlier ECU's I'm suprised the earlier cars run at all.....
A Z4 ECU will also run fine in a UK and give near UK PPP performance.
End quote.
Very usefull this.
Boost Targets & Fuel-Cut Limits
WRX/STi Saloon ECU's 2C, U8, W6, W9 - As above, 11.47psi held to redline. Fuel-cut 14.57psi
WRX (1995/96) ECU Z4 - 12.71psi, dropping to 11.78psi @ 6600rpm. Fuel-cut 15.65psi.
UK/Aus/Euro ECU's V7, 7D and 6D - 11.47psi, dropping to 9.47psi at 6600rpm. With Fuel-cut @ 14.87psi
UK Prodive ECU - 13.33psi (peaks to 13.64 @ 5600rpm, drops to 12.71psi @ 6600rpm). Fuel-Cut 15.65psi.
STi RA (1996) ECU 7K - 13.17psi (peaks to 13.64psi @ 5800rpm). Fuel-Cut 15.96psi.
WRX Wagon ECU V9 - 10.55psi dropping to 6.84psi (starts to drop @ 5000rpm). Fuel-Cut 13.79psi
Z4 and UK Prodrive map are near identicle, with the Prodrive Map running slightly more boost.
IMHO the Z4 ECU is the best stock WRX ECU you can get, as it has much tidier fuel and igntion maps. Comparing it to the earlier ECU's I'm suprised the earlier cars run at all.....
A Z4 ECU will also run fine in a UK and give near UK PPP performance.
End quote.
Very usefull this.
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01 August 2005, 04:37 PM
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Do all these ecu's 2C, U8, W6 or W9 all have the same boost targets and fuel-cut off levels
Fitting a Z4 or Z5 would be the best option if you are thinking of changing as they both have a higher boost target and cut along with less aggressive ignition maps (very similar to prodrive map) so should be ok on optimax alone
Cheers
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