[Jims5543]

Be careful of Dyno facilites AFR meters. I flew a tuner (Steve Kan) in from Texas to Florida to tune my RX-7 and after a few aborted pulls bue to rising AFR's we started changing the fuel maps.... to no avail.

We cross checked it against my Motec data log and they were not jiving.

Steve pulled his personal LM-1 out of his duffle bag and hooked it up to my car, we did another pull. The LM-1 agreed with my Motec, two against one wins. The shops dyno AFR device was wrong. Fortunatly it was showing leaner that actual so in a way it was safe but it was also very frustrating.

Cross check your AFR's next time you might be suprised.