Originally posted by O1LegacyGT
I have heard that cams for the 2.5liter can add up to 20hp, is that true? How hard is it to swap the cams compared to a v8, i have never worked on a subaru
I've never done these, but anything around the heads of the boxer is a PTIA. The Impreza and Legacy are easy cars to work in, but the heads are hard, just a disadvantage of the flat layout.
Subarus are extremely easy to work on. "Rally Heritage" to me means, more than anything, that the cars are easy to work on. One of the advantages of having a car chassis designed for the WRC is that it's extremely easy to work on. There are no bad wrench spots on the Impreza, and the Legacy platform is 90% Impreza. Another thing you'll notice, is that the car is 95% held together by either 10, 12, or 14 mm bolts. As long as you have those three sockets handy you can work quickly.
What do you want to do with your car? Add power? If so, how much? Add handling? If so, how extreme?
One of my favorite expressions is; "If you want a faster car, buy a faster car. It will cost less." If you want to add less than 50 HP or so, then your current car is fine. However, if you're thinking about going for 400 HP and turbocharging the hell out of it then it would be cheaper to buy a WRX or STi.
Is your car a 4 speed automatic or 5 speed manual? The 5 speed manual is weak and will have a serious chance of breaking whenyou get enar 300 ft-lbs of torque. The STi's 6-speed will take 400 ft-lbs + without question, it's a completely different and much beefier transmission than the 5 speed.
Good to have another enthusiast aboard.