I've browsed alot in zth. but alot mix answers. So my main question is :
If BOT low boost plus upgrading essential internal and parts if done professionally, just to increase the response of the car and not for race,
-CAN DRIVE LONG DISTANCE?
-HOW SEVERE WILL IT AFFECT THE CAR RELIABILITY AND LIFESPAN?
-WILL IT MORE WORTHY COMPARE TO ONLY UPGRADING STOCK ENGINE WITH BETTER PERFORMANCE
PART AND RETUNE?
depends what is the definition of "essential internal and parts" and what is "professional"
usually if the stroke of the engine is not too long, getting some custom forged pistons or from a turbo sibling to lower compression will do the trick, the conrods
should survive looking at ~0.7 bar.
done correctly the lifespan of the car will be no different from an NA, just make sure to always check engine oil and water temperature. Turbo is not harder to maintain, it is just less forgiving to negligence and lack of maintenance.
NA tuning costs more $ per hp compared to Turbo. if you have the money to spend, a 200bhp NA is better than a 200bhp turbo in certain conditions, but for street driving, a small responsive turbo that begins boosting at 2000rpm is great, examples are like the VW stables Polo, normal Golf turbos etc.
remember that 200bhp NA and 200bhp turbo can be very different in terms of power curve, NA engines usually do peak power at very high RPMs, whereas turbos, when size accordingly can produce peak torque at low RPM..and for street driving its all about the torque.