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I am going to be transplanting a fairly substantial car stereo system into my STi. A 4-guage power lead to an amp rack consisting of a JL 500/1, 300/4, two caps, a fairly large ported subwoofer box containing a single JL 10W7 and JL two-way components for the front and coaxial door speakers for the rear. I'm guestimating this all weighs in at about 60-70 pounds. I'm 5'10.5" and I weigh about 215..

I'm hoping I can get my STi to go at least as fast as the stats say it can if I'm the only one riding in it. :wink:

Is this possible with just an ECU or piggy-back ECU and a professional dyno-tuning for it? Is a boost controller required to change the amount of boost being used?

My desire is to increase the boost by only a slight amount and use an ECU or piggy-back ECU and tune it professionally. I'd prefer not to touch the air intake or exhaust systems at all.
 

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Please read around the powertrain forum...that's what it is here for.

Unfortunately, there is little being done with anything for power other than bolts on at this time. Most people are more concerned about addressing the detonation issues right now, not so much about getting more power.
 
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