Well,
After the milly, Forge DV and the carbonio I was suffering boost spikes which in turn led to fuel cuts on Bluefin Stage 2. I had SC modify the boost request in the mapping to control spool-up and smooth the spikes which solved the fuel cut issue (which is basically what Revo are doing with the select settings some of you guys run).
Today, I was at AmD in essex with the car and did a bit of diagnosis, testing and replacing
To prepare Superchips supplied me with 3 maps to install :
My specially modified Stage 2 map :
I re-installed this map at 05:00 this morning after trying my old stage 1 map again over the weekend (stage 1 Bluefin on a hardware modified car does not work - especially if you've fitted a downpipe and race cat - the lack of a pre-cat really reduces backpressure and subsequently allows the car to develop more boost than the stock stage 1 bluefin maps knows what to do with.) and drove from my place in NL to Essex UK via the EuroTunnel. So the map was well adapted.
First run on their dyno resulted in the following peak measurements : 260.8 HP @ 5422 RPM and 281 lb/ft at 3487 RPM - pretty much what a stage 2 map with a milly should do on a normal GTI. But as you can see from the Dyno graph, the flat spots I was complaining about are quite clear.
After having a good diagnostics going over on the car, AmD checked the cam, and cam follower on my fuel pump, removed the fuel pump and fitted the uprated Autotech HPFP internals.
After testing the car, using the same BF map as the first run, they did a dyno run to show the effect that the uprated fuel pump alone had on the running of the car.
The resultant peak measurement was 267.5HP @ 5413 RPM and 304.9 lb/ft @ 3492 RPM - now the car could fuel for the boost being requested and as a result the ECU could adapt timing etc to be 'happier'.
Now the other software: SC provided a fall back HPFP adaptation of the normal stage 2 map that would work if all went wrong and a specially developed more aggressive Stage 2 + map specifically for cars running with an uprated HPFP. We decided to install the stage 2 + map for the uprated HPFP. After adaptation, AmD did a dyno run :
This time with effect of the SC Stage 2+ map and the HPFP the resultant peak was : 274.2HP @ 5431 RPM and 310.8 lb/ft @ 3492 RPM.
The biggest difference though is the shape of the torque curve : it really filled out and was much flatter than before. Comparing what I had and the result shows a 40lb/ft of torque delta from around 3200rpm to around 4500 rpm.
The result : me a happy chappy, the car driving extremely well and with no hint of fuel cut or flat spot, just a solid linear surge of power.
BIG BIG thanks to Superchips, Michael Alvey-Anderson and AmD in Essex, Sean and his team.
Here are the graphs :
All these runs were done with the following fitted to my car :
Normal 2007 GTI 2.0. TFSI (BDA)
Milltek Hiflow Downpipe
Milltek HiFlow Cat
Milltek Resonated Exhaust
Carbonio intake
ITG Panel filter
Forge DV
and then for run 1 : Customised SC Bluefin stage 2 map
and then for run 2 : Customised SC Bluefin stage 2 map + Autotech uprated High Pressure Fuel Pump
and then ror run 3 : SC Bluefin Stage 2 (+) map + Autotech uprated High Pressure Fuel Pump