Turbo Rebuild #11 - Downpipe Welded

Some pictures if the down pipe that's been TIG welded by G19 Engineering. Hopefully the plenum will follow shortly.

MBE 9A9 ECU Upgrade

The MBE 9A4 ECU has reached its limits for my set up and whilst it is fine for a normally aspirated engine, to achieve boost control I needed to fit an external boost controller, also for wide band lambda yet another controller and I had to monitor fuel pressure and oil temp on my Dash 2.

The software for the MBE 9A9 has been significantly developed over the last 6 months and now has many more features than before. Previously I was advised to use a boost controller for adjustable boost, however it only provided different boost settings but did not tie in to rpm and gear limits.

With the MBE 9A9, the boost control software now provides switchable boost with waste gate maps for the first three boost levels and also has the ability to limit boost in gear for all maps, 

In addition to boost control the ecu also has traction control, launch, inbuilt 4.9 Wideband lambda controllers, anti lag and much more:

Control Strategies · 2 Fly-by-wire/EGAS · Sequential Fuel Injection & Semi Sequential fuelling up to 8 cylinders · Sequential Ignition & batch ignition up to 8 cylinders · Programmable Dwell Control · Multiple Crank Trigger Wheels · Acceleration Fuel  · Overrun fuel cut-off  · Wide Band Closed Loop Lambda (2 inputs)  · Fuel Pump Relay · Gearshift Light · Radiator Fan Control · Powershift · Full Gearbox Control · Launch Control · Boost Control · Water Pump control (PWM) · Traction Control · Variable Cam Control up to 4 camshafts · VTEC Control · VANOS Control · Anti Lag · Starter Motor Control · Pit Lane Speed Limiter · Low Oil pressure warning · Nitrous oxide control · CAN Data Stream · NEW functions added all the time*

As I did not want to spend £1k on another loom, I decided to re use the 9A4 loom and to make an adapter harness to connect to the new ecu, then to wire in the additional functionality over time. I started by making up the adapter and wired in new cables for the Amil valve, 4.9 Wideband, boost selection switch, wheel speed sensors and control for the additional water pump on the charge cooler. 

The ecu fired up ok and the sensors read fine, all the outputs I checked worked. Will check the ecu fully when the engine is fully back together.

When it is up and running I'll put the 9A4 ECU, eboost 2 boost controller and AEM Wideband lambda on eBay.