Car passed MOT ok just, running one cat means you need to get it real hot to work, and as it was a little worn.
I'm now half way through the second chapter of turboing my 147, totally different now it will be misson critical, all parts over engineered if possible, bigger turbo, bigger tig welded exhaust with 200 cell cat, FMIC, all inlet pipes s/s and tig welded, larger thottle body, CF1 aluminium inlet manifold (lots of work required to get it just right), oil catch can added, pistons machined to reduce compression to around 9.2, VVT removed. My aim is to run 1 bar of boost which should yield 200+ bhp. Might need to up the fuel pressure and replace clutch with something stronger.
Nice plan! But if you need around 200 bhp you don't have to boost up to 1 bar.
I did a similar thing to my 147 and managed 200bhp with 0.6 bar boost with following configuration:
- Stock engine with stock compression ratio;
- All intake pipeline = 70mm diameter;
- Throttle body from 2.0 engine (i had one spare but the one from 1.6 would work just fine);
- New fuel injectors (Bosch 0280155968 (440cc/min));
- Stock plastic intake manifold;
- VVT active;
- Custom exhaust manifold;
- Garrett GT2854R turbo;
- Standard catalyst;
- Exhaust piping = 60mm diameter;
At first the car was running on MS2 standalone ecu until I learned how to reprogram the Motronic. Now the car runs fully on Motronic using a blow trough MAF configuration. I've been running the car for almost 2 years now and didn't had any problems. If you need details about my upgrade I'll be happy to share.
p.s. with 1.0 bar boost and a properly tuned engine you could reach 240 bhp. But then you will have other issues to worry about.... i.e. gearbox