The best just got better
I had arranged to have my Brera 3.2 Q4 remapped at the weekend by Darren from Energy-tuning.co.uk who I have used many times. He came up to do it via the diag socket but his Alientech Kess programmer reported that the Bosch ecu cannot be read, just identified.
He told me it was risky writing a remap when you do not have a backup copy of the ecu file* but he could do it on the bench back at base using his Alientech Ktag kit.
His photo shows how this connects directly to the ecu circuit board using spring loaded pins (circled in yellow in the photo) to read and write the flash rom.
He mailed the ecu back on monday and I refitted it tuesday and immediately felt I was driving a 3.2L engined car in the higher gears (ie below 3500rpm), whereas it had always felt flat – more like a 2.2L. The attached torque curve explains why – it looks artificially flat to me from 2000 to 3500rpm as standard (black line). I would have expected it to approximate the red line and now its been remapped, the torque is closer to the green line. It's improved further over the last couple of days and 150miles and is well worth the £249.
The remap file was supplied by Quantumtuning.co.uk and they claim 14bhp and 23lbs ft , but did tell Darren that they could see that torque limiters had been turned down below 3500rpm and have had excellent results with other 3.2L Alfas. Had there been a 4wh drive dyno neaby I'd have had before and after runs done but the nearest one is 100miles away.
* this is why I use Darren – he does not take risks with customers vehicles, nor makes cloud cuckoo land claims and he also stabilises the battery and runs his laptop off the mains when writing a remap via the diag socket. He's seen many disasters when amateurs have failed to take the necessary precautions.