Your right, I was thinking the L03 motor, but he has the LB9.
217hp (him) vs. 210 + 20? (you)
(you) Lugging around an extra 5 - 800 pounds.
(you) poor gearing (assumed).
You still lose. but not by as much anymore.
OK, seriously. Who cares if this thing is a Porsche, ricemobile, LS1.... go race your car at the closest drag strip in your area. Since you can drive your car around, getting to a track shouldn't be a big deal. Race your car and get the ET.
From this, you can figure out who you can take or not. What's a porsche 944 turn in the 1/4 mile? probably high 14's, low 15's maybe? What's this IROC turn? Mid 15's probably. Get the time slip and find out.
Then if your friend wants to shoot his mouth off, both you and him go to the track and race each other (after you find out what you run - cause you'll know what to expect.
Don't be surprised if you actually trip the timers at mid to high 15's. This is usually slow enough to be embarassed by some of the more sporty stuff driving around town.
I'm assuming this car will run mid 15's. And I'm assuming the 944 will run low 15's.
Which is why I predict orion_uv will be looking at the porsches tail lights moments after stepping on the gas.