[WRX-maniac]

So a few things first...... You have an 06 wrx with a catless downpipe, borla manifold, sti intercooler, ebcs, AND you are running a cobb OTS stage 2 map? If money isn't an issue, then why isn't your car properly tuned for your mods?

Have you ever read the map notes for cobb's stage 2? Recommended catted downpipe, catback, and an intake approved by one of their ots maps. Your car....... I don't know how it is even running right with a 3 port ebcs, as that part requires a tune for it immediately after installation. If money isn't an issue, then I would do the following, take the car to a protuning shop, tell them what you have done, have them do a compression/leak down test to make sure the engine still healthy after running it with a tune not efficient for your modifications. And if you luck out and your engine is ok and all checks out, have them protune it. I would absolutely do nothing else performance wise to your car until you are properly tuned and sure your engine is still reliable.

 

[WRX-maniac]

Wasn't assuming anything. Just going off how your OP read. Never once wrote you off as an idiot. Now, with your second post, things make a little more sense as there is more info given than before. Too many people come on here that don't know what they are doing and do some crazy mods with no tune or wrong tunes.

The 18g would be a good upgrade for your car. The TD04 will inherently still spool up slightly faster than the 18G will. But having the ebcs and a good tune will help spool times decrease a few hundred rpms. The problem with the TD04 is that although it spools up quickly and hits full boost pretty early on in the rpm range, it looses pretty much all of its power in the higher rpms. It is actually a pretty inadequate turbo for the EJ255. Hence why Subaru upgraded to the larger and better vf52 in 2009.

The 18G will have a little more lag to it when compared to the TD04. Even the stock vf52 on the 09-14 wrx's has more lag than the older TD04. But I think if you have a good tuner you will be very happy with the performance of the 18G. It will probably spool up like 300-600rpms later than your TD04 (guesstimate) but will hold power much further up in the rpm/power band. I would suggest going with ID1000 injectors and the AEM320lph pump.