Its the result of many year tuning the AGU and k03s combo... first thing to do is try and find another tuner who will do a full custom remap on an AGU with ths same mods? phone them and email them and find out? The UK norm is to just use a generic stage2 map, or some tuners say stage1 with mbc to up the boost..lol I think I have spent over 500+hours mapping AGU k03s engines over the years, many many happy customer with proven result on other dynos.
The FACT is that you cannot get a K03s over 240bhp on the oem actuator, a forge unit is needed with yellow or blue spring and the mapping method is to get the boost to 21-22psi as fast and early as you can in the rpm range and hold close on 18.5psi until 5000rpm then taper the boost off at the top end so the turbo dont blow hot air. The k03s is never going to make and power at the top end of the rpm range as it aint up to it, which compresor maps show albeit to a "SAFE %" on paper.
Now lets let a little out the bag.. the AGU fuel mapping need to refined as if your going to draw some much air in at 3000-5000rpm the ecu will fuel in the 10s and even 9s, just search the forums for k03s/k04 AGU dyno plots vs lambda and you see what I mean, the mapping needs to set the fuel between 13.1:1 - 12.4:1 from when the turbo spools till the power starts to die off. Its hard to get the AGU to fuel in this manner as the part load lambda is based on load v rpm. A generic stage2 map would just over fuel and eat way at the power from such low rpm at such high boost. Once the fuel is spot on the timing then can be used to make power, which with the lambda being at 10:1 would have not real effect on power. The timing play a HUGE part in getting the power from a k03s AGU.
If the guys on club GTI dont like the idea of 240+bhp and they have the same spec1 car, I am willing to map there car and make it much quicker and give them the numbers above.... £FOC and not matter what other tuners maps on there. Then they can go to every dyno in the land to get it tested and logged.
I once was a doubter saying the k03s would never make power like this, there are many post with me making these comments...
Its only until I started to realise that the oem actuators would not do the job by holding the power in the mid range(they would spike to 25psi easy but tail off as the waste gate cracks open at 3500rpm)
I started to tune customers cars with the forge actuators, customer where comming back with there k03s AGU which we had mapped with the oem actuator, we fitted the forge unit and the car was night and day. Many customer here who have this setup.... BUT only a few of them have the correct fuel setup to go with is, the stock injectors run 100%IDC with around 225-230bhp and the lambda readings head north.
If the guys on club GTI dont like the idea of 240+bhp and they have the same spec1 car, I am willing to map there car and make it much quicker and give them the numbers above and VCDS reading to back them up.. I will do it £FOC and not matter what other tuners maps on there. Then they can go to every dyno in the land to get it tested and logged an post up there finding.
Chris what was your stock MAF reading with the map setup for the stock injectors?.
235bhp??
