MAPPING BY ANDREW CARR

 

The Subaru OEM ECU is a very capable and sophisticated computer controlling all aspects of engine control from starting, warming up and cruising, to accelerating at full chat with the turbo forcing air into the engine at around twice atmospheric pressure. It does this at any temperature or altitude, on varying qualities of fuel over the lifetime of the engine, allowing for the degradation of parts over several hundred thousand miles, learning and self diagnosing problems throughout it’s life.

All but the MY97/98 Impreza ECUs can be remapped and this should be the first option considered by any owner wanting a remap.

MY99-08 cars can be reflashed directly where as the early MY92-96 ECUs require the fitting of the ESL Live daughterboard prior to mapping.

Prices:
MY99-00: £550
MY01-09: £350

 

 

Plug and Play replacement ECUs available for MY92-MY05 Impreza.

Massively capable ECU with all the features you could possibly need on a road or track car: 2 switchable maps, LC and ALS, AVCS cam control, close loop fuelling and boost control, knock detection and much more.

 More details here: http://www.simtekecu.co.uk/

 Price, fitted and mapped:

MY92-96: £800

MY97-98: £800

MY99-00: £900

MY01-05: £1050

 ALS/LC Option: £150

 

 

The ESL Live daughterboard is a small PCB which fits into the ROM socket on the MY92-96 OEM ECU. Once installed this board makes the std ECU fully remappable in real time.

The early ECU is very capable, but can be hindered by some of the early ancillary parts, specifically:

1. The MAP sensor can only read to 1.23bar, in reality this limits boost control to around 1.15bar in order to maintain the overboost safety fuel cut feature.

2. The MAF sensor can only meter enough airflow to make around 330bhp

The ESL mapping software allows these limitations to be overcome by allowing the configuration of sensors from later models.

A version of the board is available which will allow the car to be run with a MAP sensor rather than the MAF as the primary load input.

More details here: http://www.enduringsolutions.co.uk/

Price:
£550 Fitted and Mapped,
MY97-00 MAP sensor + £50 at time of initial fitting.

 

 

The Apexi PowerFC is standalone ECU that completely replaces the OEM ECU on the classic Impreza. It is a basic ECU without advanced features like Launch Control or Anti Lag Strategy but with fast, accurate control over fuelling, ignition timing and boost control it will result in a very smooth and powerful car. Our pricing includes the Apexi FC-Commander which allows monitoring of various engine parameters and selection of up to 4 different boost levels.

The MY92-96 PowerFC is now in limited availability and has been superseded by the ESL Live daughterboard.

More information here: http://www.apexi-usa.com

Prices fitted and mapped:
MY92-96: £900
MY97/98: £800
MY99/00: £800

 

 

Additionally we can supply and fit the Apexi AVC-R Digital Boost Controller.
More information: http://www.apexi-usa.com
Price:
Supply, fit and setup: £400
Fit and setup only: £75

 

 

 

 

ECU Features/Compatibility:

ECU

Type

ALS/LC

In Gear Boost Ctrl

User Map Switching

MY92-96

MY97-98

MY99-00

MY01-05

MY06-07

MY08-09

Subaru

MAF

No

No/Yes *

No

 

 

Yes

Yes

Yes

Yes

ESL

MAF/MAP

No

No

No

Yes

Imminent

 

 

 

 

apexi PowerFC

MAF

No

No

No

Yes

Yes

Yes

 

 

 

Apexi AVC-R

MAP

N/A

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Autronic

MAP

Yes

Yes

Yes

 

 

Yes

Yes

 

 

Simtek

MAP

Yes **

Yes

Yes

Yes

Yes

Yes

Yes

 

 

* Certain models from MY01 onwards have this capability.
** Cost Option