[asshanson]

Alright, took it out for a drive, and had my girlfriend drive behind me. She said there was a lot of white smoke coming out while accelerating, and the car was somewhat warm, but not over 200. So we switched spots and she drove back home while I followed, she didn't get on it very much at all but I could still see some white/light-gray smoke coming out under any moderate acceleration. It's mostly water in there for coolant right now, so it didn't smell like antifreeze. It was different than at the dyno day, there all the smoke came out after the pull was done, this time it was during acceleration.

Temps still weren't up to normal, so we drove out to the BP a couple miles away. On the way there it didn't get above 220, but I was being really conservative, no boost at all, and had the heat full blast. On the way back it stayed the same until I turned off the heat and had to go up a hill. Then it immediately went to 140 or something, so I turned the heat back on, coasted down the hill back home and it went back down to 130. Overflow bottle was pretty full, but not overflowing, and not all bubbly.

So I'm pretty sure it's a headgasket, now I have to figure out how to fix it.