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The stock injectors and stock computer are just barely enough for a stock turbo
if you put anything besides an original t-25 on it, it will run lean and damage the engine
The programming for the factory turbo is actually kind of lean compared to how we usually tune these, but it works fine because of the extraordinarily low flow rate of a stock turbocharger (barely 200hp from most used T-25 units will hardly harm an 2.0L with a slightly lean a/f ratio say high 12's to mid 13's)
You need an apexi Power FC L-jetro, some 740cc injectors, a real quality turbo capable of 44lb/min minimum, and the Z32 maf all working together in front of a 320lph fuel pump like the aeromotive stealth, to support any reasonable measure of power when compared to todays standard expectations for gasoline engines.
The sr20 also need a camshaft upgrade to get from 320rwhp mark to the 350-400 ranges with reasonable boost pressure.
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