So to start off I just bought a BRAND NEW (to me) 2002 wrx. The previous owner did absolutely no modifications to the car, aside from a sound system, so its 100% stock from the factory! It's a car that i have personally dreamed of owning since ive been about 8 years old and the moment has finally come. The one and only downside to this purchase is that the car has about 170,000 miles on it. I plan on using it as a daily driver so Ive been all over the forums and have gotten the impression that this means I will be in desperate need of another motor here soon. With that said I have decided to take the initiative and plan for the day that I am going to come face to face with an engine rebuild. I have spent hours upon hours researching this motor and how to tear it all the way to splitting the block and replacing the crank. So i am not too afraid of doing a lot of the work myself. I have plenty of quality family mechanics on stand by if I find myself in a bind however.
Time for the questions...
1) Should I reuse by current block to rebuild the motor or find one online? And what is the estimated cost of reusing versus replacing? I would like to stick with the 2.0 but am open to suggestions. I have read about a million different threads, but they all use the engine code JDM ej205... is this the same engine that came in the usdm models? If not what is the difference?
2) would i be able to build the presumed ej205 to the same specs and the ej207? which i've read is more powerful and reliable, but i also dont know if this is total fact. If I can rebuild the 205 to match the 207 what would I need to do to it?
3) I'm really not looking for anything more than like around 300 horse power because I would like to avoid having to replace the trans if I can help it. With that said, what components should I build the motor with to hit that power mark but still retain good reliability, since it will be my daily driver?
4) does any one have good suggestions as to where I can find a good short block for a decent price? I am considering the option of buying a second engine to put on a stand in my garage. That way I can build this engine over the next few months, with aftermarket parts. then when this one fails I will already have one ready to drop in so I dont have to go without a vehicle for an extended period of time. Everywhere I look I find only long blocks. Do i have to resort to junkyard hunting? I know that buying a used short block usually will mean I have to get the engine rebored. exactly what goes into doing this from my end aside from taking it to a machine shop?... speaking of reboring, does anyone have a price estimate as to what that usually costs? can pretty much any used block be rebored and used again? if not what kind of damage causes an engine block to become nothing more than a boat anchor.
Thats all the questions I have for now. I know that I am asking for a lot here and I truly appreciated everones input. like i said, this is my first subie and owning it is a dream come true so I would like to do it right. Im an engineering student at asu and the engineer in me just wants things to be as perfect as possible.
Thanks for all of your help and I look forward to speaking with you all.