I'm too lazy to go back and read this entire thread again, but are you sure the current tune allows for the MAF sensor? I've read that the MAF isn't normally installed on European versions, but here you are.
Then there's RPM Power --- I recently visited RPM in Vancouver and he's (Lorenzo) running a big turbo with a stand-alone (forget whose). He's pushing just under 600HP! He's not likely to do just a tune for you, he wants to sell the entire package, then tune it. However, you might look around for another RPM facility closer to you, they might work together and get you a tune.
I wouldn't give up on Nick either --- nothing but praise for his stage 4 Garrett tune on OEM ECU.
Best of luck ---
Hey Walt, good to hear from you.
Yes on European JCWs they ran a MAF as far as I know. It was the Cooper S that didn't which is why most big turbo cars in the UK started life as a cooper s.
I used to have a lot of time for Lorenzo, he was a nice guy, generous with his time for questions etc. Spent probably around $1500 with the guy for his stage 3 map, the Powergate 3 module to load the maps on etc and when discussing going to a big turbo he said he'd hook me up with an RPM tune.
That was until the time I was about to send him money for a map he backed out citing the owner of RPM Portugal won't allow him, and said only if I buy I think it was either his billet inlet or an r400 kit he would do the map. I'm sorry but that's just BS behaviour.
And in terms of other RPM dealers I tried that route, they all feed info back to the mother shop and when they found out it was for me they said no, again after saying yes Initially. I find that mentality very childish.
When you get so caught up in the perception of how great you are you forget the people that bought into you in the first place. Just my opinion.
I'm still holding out hope on Nick K. But let's see what happens. For now the car is stable enough on the stage 3 map for daily driving but I'll try and find a solution soon.