I may be being daft here, but hear me out. I had my AGU engined A3 remapped a few months ago and it goes well. Now, i suspect it is a very rich map as: A: Its more safe and has less chance of a comeback on the chap who chipped it with it being a 'generic' map. B: My MPG is alot worse even under normal driving conditions (I have serviced the car since and fitted uprated plugs) I want to fit a boost guage to see what it is boosting to. Once i have done this i want to tweak another couple PSI out of it. Whats the best way of doing this? Manual boost controller? N75H? Any other methods? Cheers all!