I just did my lil brothers again (successfully this time unlike last season...) last week. Just scaled the IFR table tune was still spot on and we were running a 2.7 pulley@20psi 12.0-12.2 AFR with a little better than stock timing and no spikes of kr at all. The car was a monster, pulled really hard all the way to 120mph however, he's back on 93 and 2.9 until he goes on a road trip, but once he's back we'll probably be running it the rest of the summer. We might even try a 2.6 but that's completely up to him, his car...his money... He doesn't even have the dual pass intercooler plate, still stock flow with a cobra heat exchanger. I'd suggest it, despite the cobalt guys telling you "it doesn't work on cobalts" cause bottom line, cobalt peeps are fucking stupid (no offense) most of them are attempting to give advice and they haven't even graduated high school yet. Dumb ass's... Ohh yea, with huge injectors the shit goes fast, especially with the tiny cobalt gas tanks.