I tuned it with the wideband O2 installed just after the downpipe. This run was a single "dirty" run with the tail-pipe sniffer, which was all over the place that day on multiple cars. The car is safely tuned with 15 degrees BTDC timing, 93 octane, 18 psi with 490 rwhp and 520 torque. It is over 550 rwhp with race gas at 24 psi...