could somebody educate me about what it means to modify a STi?

What's a uppipe and downpipe? How does it effect the emissions of a car? I live in MD and every other year we have to take our car in for emissions check. Is a PITA.

What type of power would you be looking at with stock turbo and stock fuel system?

 

[QUOTE=Bboy AJ,Jan 13 2008, 08:14 AM] You don't need to tune anything.

 

[QUOTE=rai,Jan 13 2008, 10:19 AM] could somebody educate me about what it means to modify a STi?

What's a uppipe and downpipe?

 

The '08 Sti has the capability of running multiple maps with a turn of the Si drive selector. I haven't read of anyone decoding that matrix yet but I look forward to listening/reading about it. It seems like you could switch to the economy map for MPG if it was tuned. I would want to have it tuned after purchase but would just want a linear map made. I have no interest in making more emissions. I've wanted the ability to run multiple maps, on the fly, on my motorcycles for years. Flip/Turn the switch and run a reduced power map, that is still healthy for the engine. Another map for full power Mr. Sulu

 

As a former owner of 2 S2000s, I would never say that the car's extremely narrow powerband is a plus, and I'm not sure many would advocate the extremely narrow powerband as one of the car's better attributes. Nonetheless, given the car's other strengths, I was willing to overlook the narrow powerband. I don't think I would be willing to overlook the issue in a car like the STI, though (lower revs, more weight, more of a daily driver, etc.).

 

http://www.xpttuning.com/osecuroms/viewtopic.php?t=811

Good quality free maps. I've logged the stage I for 120 miles now, no knocks IDC max in the 80's.

Notice the input from multiple logs on that thread and the adjustments made by Gabe.

He now sells a stage II map (requires downpipe) that he will "tune" for your car based on logs.

The thing is, the Sti does not have a narrow power band. The 07's and 08's do have a shitty factory tune which causes lag. Oddly the EU maps don't have this same issue, so it appears emissions is in fact at fault here.

With a reflashed map -- even Subaru offers one that some say works power is back to where it was for 06; i.e. all over the damn place with a bit of trail out at higher rpms.