If you want to "chip tune" the only sensible option is to get it to an experienced tuning shop and re-map it on dyno.
You'll have to research first, not all dyno operators and tuners actually are as professional as they advertise.
Reliability is mostly the result of the tuner, if it's properly mapped and they know their stuff it won't be affected. Of course if you would go and push the limits of the engine this would be different but I doubt 150bhp from a 1.6 is pushing it unless the engine has an unique weak spot.
The power increase comes from adding more boost and the appropriate amount of fuel and typically retarding spark to avoid detonation. Since you are talking about diesel there's no spark but anyway wanted to say this still (I have experience mapping petrol engines).
Most probably you wont gain any fuel economy, at least not if the factory map isn't too messed up. If fuel and timing on partial throttle situations are sensible from factory the tuner won't probably touch these areas of the map at all. So you only make more power when full throttle and the desired boost is reached. This will be a lot cheaper too because you wont spend the whole day on the dyno going thru the whole of the maps, but instead just take the time what is enough to get the performance gain. This is usually quite fast and straight forward because you only do few power runs on the dyno and adjust the tune in between.
Well... My current turbo is also a china charger and it has been running for two summers with quite the abuse (WOT compressor surge etc.).
I admit it's a risk buy, but most of the china turbos seem to be ok. Also visible balancing marks on this are a good indication.
BTW I also have Chinese carburetors on my second car.
You are implying that there is good sound with the video title. It's not a big deal, but when I clicked a link about racing sounds I was disappointed to only hear distortion and that is what I commented about.
My point simply was that the poor audio quality means there isn't really anything to listen on that video. Video about racing labeled "sounds" would imply that it would be enjoyable for someone who appreciates the sound of a competition engine getting properly used.
Gamers Crib is running one public server. But I have never driven there so can't say if you can get proper online racing practice there.
If you feel confident enough that you can complete a 15 min qualy + 30 min race with a grid of 20+ cars with gentleman like maneuvers without it turning in to a crashfest then I'm sure you are welcome to join in for the league. It's a pretty laid back and there are multitude of different skill levels on the grid at the same time.
For some reason there is no sign-up thread for the current season (4) but if you post about it on some of the threads here I'm sure you'll get in.
Power & Glory (GTR2 mod) is currently my fav sim. I think the physics are good actually, it's just a bit like rF too, you need to know how to setup it to get all the potential out of it.
I'm currently driving on the Gamers Crib (http://www.gamers-crib.com/forum/index.php) PnGv3.1 league and it's probably the most fun of online racing I've yet had.
AC will probably take this place at some point, but it's just beta still.
RBR is the best and only rally sim out there. I myself don't like the RSRBR mod tho, the interface is just weird and it has a lot of content that doesn't seem like it's ready for publishing. The physics are a little funky too.
You can have very good mods for RBR, but I think all the good ones are standalone really. My favorite thing in RBR is to take the mk2 BDA Escort to Ouninpohja stage (yes you can have good RWD physics in RBR). And the RBR Real Physics Team's physic hack has revolutionized the way RBR does 4wd physics. The problem with RBR seems to be that the modding community is very scattered and you have to pretty much know what you are searching for. I myself only use a one Finnish forum (http://www.virtualmotorsports.org) that is pretty much the only one that can offer what I want for this sim (huge selection of Finnish gravel stages).
Woah that's fantastic. I really love that scene where he jumps off and you can see him getting smaller and disappearing in to the scenery which is the earth globe.