A couple of comments here. Take them for what you will.

My car's latest VTS came from 1999. There is a VASTLY different setup in World Challenge now than when my 240SX ran in WC. Back then, it was required to run factory stock gear ratios, 17x7 wheels, compression limited to 11.5:1 (which gave it a spec of 215hp and 190lb tq MAXIMUM), and no splitter/wing/etc.

As for expected times, this is only my brainstorm, but take a look at the fast EP guys in your area. At runoffs, the winning cars were about the same lap times as the guys in EP. Since we have some pretty good drivers locally in EP, I'm using them as a target. I only have 7 sec/lap to catch up!