Originally Posted by SubasaurusWrex
i had the exact same problem when i was deciding on my motor choice. In the end i realized the EJ207 is the cream of the crop. Built motors can have problems so I didn't even want to have to deal with it.
I can see a good conversation forming here.
The V7 EJ207 is 8250 redline, while the V8 with bigger port heads is set at 8500. There is without question no comparison between a USDM EJ205 and a JDM EJ207 in any way, ESPECIALLY off boost power. Variable valve timing is the king in this region. The 207's also just seem to rev stronger, smoother, and happier in every way.
I currently drive a lightly modded 04 STi (2.5) and my fiance has a 98 RS with a non-RA V7 with a V8 Twinscroll system. My STi is for sale because the 207 is just simply more fun in every way. Granted the twinscroll accounts for earlier boost, but it does not magically add any displacement to the motor. A 207 is hands down stronger at every rpm than the 205 we are or were used to.
For big power, V7 as you know has the forged internals and is probably the way to go. For amazing revving, go with the V8 and a slightly larger turbo (20g ish?) and never look back.