224/230 comp cam, 3k TCE histall made 270rwkw, I am trying to find out what sort of economy people get making similar power in an LS1 or other (food for thought)... all the driving is inner city... I am averaging 230ks to a tank http://www.youtube.com/watch?v=1B_JLS0QBOc Some original photos have not been recovered yet.

Hey mate that's awfully high consumption. I'm running a 224/228 cam in a WH statesman with a 6 speed manual 286rwkw. On a recent trip I averaged 8.2L/100 on a trip up to NSW. Although through town it's a bit of a killer with it averaging 20L a 100. I presume your tuner increased ignition timing? so it's a little bit below max engine output torque?