anu ba displacement nyan? Kung mga na 1000 to 1400 cc then the best bet mo ay salpakan mo iyan ng intercooler turbo and a good free-flow air filter and a bit bigger diameter na exhaust pipe. It would probably set you a big gastos though.anu ba displacement nyan?
Option 2, just add or convert your air filter to free-flow set-up (K&N etc) and have a good tune-up, probable 5HP increase in power. Hi-tension wire won't help kung hindi naka tune up ng ayos ang car mo.
Reducing or lightening the weight of the car would also add a few more HPs.
The smart car na nasa showroom ng BMW/PGA cars at the Fort is a 3 cylinder vech with the above mentioned features.
Lastly, ilang HP increase ba ang gusto mo?