Several weeks on and I've now got Pedro back from Bill, having had the new AEM WMI kit fitted in-line with my EBoost EBC and a cut-off solenoid in case of low-level or WMI failure for safety.
The remap was then finally adjusted for my higher compression 1.9 rebuild to see what results could be seen on my existing K03 hybrid, which was a mixed bag of results.
With the 1.9 and ported smallport the volumetric efficiency has been raised by such an extent that the little K03 is ultimately acting as a choke point in the system, unable to sustain the flow what the engine is forcing in. This has led to an earlier onset of boost and relative torque, but with an earlier drop-off in power too.
With a little tweaking and the addition of WMI the end result was
273 BHP, 310 lb/ft
Here's the before/after plots which paint a clear picture:
As before, I requested that the map was made more aggressive than linear out of personal preference and the car certainly feels more lively than before as it throws in as much boost as it can handle, but ultimately drops off the power curve quicker too.
For the first time in my ownership, I've really started to re-evaluate where I want to take the car from here. On the way home I had a play with a V12 DB9 and although it was great fun to surprise something like that, I couldn't
help but feel I was still sat in a SEAT while he cruised off in his Aston...
Things have definitely changed for me since I got my BMW where I'm now used to more refinement and status and this has undoubtedly had a knock-on effect with this car, leaving me questionning what to do with it.
I'd like to have something I can use on track on a regular basis and it's clear that in its current state of tune the Cupra can't offer enough reliability for that unless I spend more money getting it setup properly with a different turbo, buckets/cage and more linear map and I'm just not sure I want to spend the money on what's now an 11 year old SEAT.
The car owes me over 20k now which I'mnever going to see again and I'm not sure I can ever justify spending more money on something my heart isn't 100% in - but I'm not sure where that leaves me from here.
Options at this stage include:
1. Rebuild K03 to 2283 hybrid, 550CC injectors, new linear remap, ported manifold and bucket seats to get it more track orientated, with a comfortable ~320 BHP
2. Spend £££ on "finishing" the project with a BT Garrett 2868 HTA that will see high 300/low 400 power
3. Sell/break the car to get what money back I can and buy something as a track toy, possibly a supercharged VX220
Ultimately I feel as if I've outgrown this car, but then if I'm intending to use it as more of a dedicated track toy then should this necessarily cause an issue?
Tough call
