Your chart is quite interesting. The S4 has the same engine as the ST4. Funny how things can end up so differently, with just a few changes. I'd like to see what you get with the heads, different cam timing, 1mm squish, and a new map. Post back when you make changes, and I'll do the same.


Modified by DanST4 at 3:28 PM 4/16/2004