Another drop-in from the Peugeot 406 Coupe Club :)

My name is Graeme and I'm from Scotland. I drive a Peugeot 406 Coupe, with the 2230cc EW12J4 naturally-aspirated 4 cylinder petrol engine. 160 horses.

I love the car as it is, but the possibility of another 15 - 20 HP is always quite tantalizing. I'm told that a naturally-aspirated engine should be able to produce around 10% more power than it has when it leaves the factory if properly-tuned. Not quite sure I want to spend £300 for a mobile remapper to come around and copy a library image on to my ECU though.

Hope to learn a bit from your good selves about how ECU mapping on naturally-aspirated engines works.

Cheers
G

Welcome.