MY98 WRX Wagon ECU - 250bhp on TD04/380cc
10 December 2006, 06:42 PM
#1
Scooby Regular
Thread Starter
MY98 WRX Wagon ECU - 250bhp on TD04/380cc
Possible plug 'n' play upgrade for a version 4 UK Turbo 2000? Here you have the standard '88' ECU out of my MY98 WRX wagon, which was the highest powered WRX classic wagon up to that point, listed at 250bhp standard.
Obviously this is a Japanese ECU designed for high octane fuel, but because the WRX wagon ran a TD04 turbo and 380cc injectors as standard, which I believe is the same as UK Turbo 2000 of the same age, this could be a cheap and easy power upgrade, as long as you don't mind using Tesco 99 or Shell V-Power from now on.
This ran the Scoob for 7 years on Optimax, and also coped with a Walbro 255 lph fuel pump and VF35 turbo upgrade with no problems.
£50 delivered.
Obviously this is a Japanese ECU designed for high octane fuel, but because the WRX wagon ran a TD04 turbo and 380cc injectors as standard, which I believe is the same as UK Turbo 2000 of the same age, this could be a cheap and easy power upgrade, as long as you don't mind using Tesco 99 or Shell V-Power from now on.
This ran the Scoob for 7 years on Optimax, and also coped with a Walbro 255 lph fuel pump and VF35 turbo upgrade with no problems.
£50 delivered.
11 December 2006, 07:21 PM
#3
Scooby Regular
Thread Starter
No, it wasn't mapped for the VF35.
I had the engine rebuilt with STi 5 heads, which the ECU ran fine. IIRC on the original TD04 it used to boost up to around 13psi. Then the TD04 wore out and I replaced it with a VF35 and at first I simply connected the actuator input to the compressor outlet and it hit and held roughly 10psi like that. Then I thought, for a laugh why not hook up the VF35 to the standard piping (i.e. the two port solenoid and restrictor) to see what happens. It made around 15 psi boost on that and no engine problems. Later on I replaced the ECU with a Power FC and now the VF runs at 1.4 bar.
But I was pleasantly surprised at how little hassle it was running the VF35 unmapped just on the standard ECU. There's a lot of talk on here about how you shouldn't do this and shouldn't do that, but at the end of the day it's just a slightly better turbo, the ECU can still read its boost fine, still fuels fine etc. It never threw up any CELs or other problems. Come to think of it wasn't so long ago that turbo drivers just wound the actuator arms on their turbos in and out and that was as far as underbonnet tuning of cars went LOL.
I had the engine rebuilt with STi 5 heads, which the ECU ran fine. IIRC on the original TD04 it used to boost up to around 13psi. Then the TD04 wore out and I replaced it with a VF35 and at first I simply connected the actuator input to the compressor outlet and it hit and held roughly 10psi like that. Then I thought, for a laugh why not hook up the VF35 to the standard piping (i.e. the two port solenoid and restrictor) to see what happens. It made around 15 psi boost on that and no engine problems. Later on I replaced the ECU with a Power FC and now the VF runs at 1.4 bar.
But I was pleasantly surprised at how little hassle it was running the VF35 unmapped just on the standard ECU. There's a lot of talk on here about how you shouldn't do this and shouldn't do that, but at the end of the day it's just a slightly better turbo, the ECU can still read its boost fine, still fuels fine etc. It never threw up any CELs or other problems. Come to think of it wasn't so long ago that turbo drivers just wound the actuator arms on their turbos in and out and that was as far as underbonnet tuning of cars went LOL.
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