Tune, quality of parts and install are major players. Let's be honest, there are just plain STUPID tunes out there that blur the actual expectations of what this motor can do.
That being said, I would not reach for more than 500 ever on 91-93. Who knows when you hit a hot day, get a bad tank of gas and detonate the **** out of your car and it goes downhill.
Parting Shot: please, research ANY part you buy....there's parts that work and are designed to do so, and knock off crap that was made to make a buck. Do not let the latter into your engine bay, you WILL regret it!
Gluck!
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