Honestly Don, WHAT can you do to increase the performance of an Alto without making it dangerous? I will tell you an incident that happened a few years ago on Talangama Koswatte Junction. There was a guy who did up his Alto. He had the works in it. K&N Filter, straight flow exhaust that woke up the neighbours, ect ect.. and this guy indeed drove very fast and like a jerk... but one day he took that darn bend in the junction a tad too fast and the car just toppled and injured 3 pedestrians and himself.
If this forum needs to have some credibility like you say, we need to advise people responsibly. Getting a a car like a Alto extra oomph to satisfy the ego of a immature wannabe boy racer just puts us all at risk. IMHO, the Alto or the Maruti Cannot handle any extra bhp as the whole chassis/suspension setup was NEVER designed for that. If the dude wants to modify an older Galant, Lancer, Sooby or even Mazda, I am fine with it as these Chassis can handle a an extra 10-20BHP without compromising safety.
That's my take on that. I have very strong feelings on this matter as I lost a friend of mine overseas for the same reason. He drove a car that couldn't handle the extra bhp and ran head on to a parked truck.
Besides, how many times have we gone around this particular Mulberry bush and that thread had enough and more pages to convince anyone...