I found a DOHC head the other day and almost bought it - Daewoo.
I'm not doing that though, kind of purged it from my mind. I've promised myself I'm going to get this car finished so that it'll be a dependable backup car when needed.
However, I've already got an intercooler and some plans. I've done a ton of research also. Apparently, GM in the dawn of turbo technology decided not to use intercoolers, and instead added almost 4 times the needed amount of fuel and moved timing forward to compensate for heat. The 2.0 with an automatic gets about 25mpg EPA estimate in the Grand Am - a car that weighs considerably less than a Fiero. The injectors are literally supposed to be about maxed out in stock form. So I plan on using a WBO2 and pulling a considerable amount of fuel after adding an A2A intercooler. If I can pull MPG back to 35 and turn the boost cut off and crank the T25 to maybe 10-12 lbs, I should be in the 200+ bhp range, and that's something that would make me considerably happy. I've read just about every turbo build I can find, and they all turn into horror stories after upgrading to a larger turbo. Even the T28 upgrade sounds like it moves power too far forward. Although I'll add, just about everyone online is using complete hack work to make power - as in tricking the MAP to read a false value to get around the fuel cut at 9 psi. If I can keep Kr down, turn boost up, get more economy out it, and make as much power as my old 3.4 DOHC with a lightweight 2.0, I'll be happy.
I'll definitely share results. I'll put it on a dyno when I get "done" with it, and we'll see.
Sources:
http://www.daewootech.com/forum/viewtop ... b&start=15 http://www.cardomain.com/ride/2237171/1