Originally posted by BlownSonoma:
Hey Mark did Dynotech put a sniffer on your tail pipe to read the A/F ratio? Im sure they did which means its probably not all that accurate. If we can mount my wideband right on the collector of the y-pipe we should get a pretty accurate reading and we'll be able to see whats going on.



Actually, for greatest accuracy you should use one of the upstream O2 bungs in the manifolds. You want to get the reading A) as close to the heads as possible and B) before the cats have had a chance to scrub the exhaust gases.