Wow. All of this information was from toyotacelicas.com.
here are a couple of quotes from that site just by using a quick search.
"The problem is that the stock ecu has no provisions for a knocksensor, and the motor will knock itself to pieces unless you back the timing WAY off via an MSD BTM or something similar, and you'd have to do that to the point that you'd be losing a butt ton of power."
"You have a rev1 motor. It'll blow up. Don't boost it. Use punctuation. "
Do the 5th gen Celicas and the 2nd gen MR2s use the same variant of the 5s? I would assume so...
Sorry for the wrong information. I will keep my trap shut next time.
Oh yeah... I KNOW that I saw on the board someplace that they were criticizing how weak the 5s block was. I will have to look for that.