40 replies to this topic

[RazerX]

Same here, reading & learning. Watching AFR on-track has always concerned me that the car was running too lean. I could get the ratio on target in 4th at 6500, but with the Miata's lack of power it often takes much of a straight to get there and until it gets there she looks lean. (This also puzzles me, as one would think the car would flow too much fuel at WOT during lower RPM, then when at higher RPM, higher demand..?) How much time per lap is the engine seeing Lean vs. Rich and where/when should the "danger" flags be waving that adjustment are necessary?

 

Wish this portion of the thread could be pulled to it's own topic, It might have more interest if it wasn't flowing under Heater Core chatter. I've thrown AFR & Lamda into the topic tags for future reference.

Always learning, love those that share.

 

I'm an engineer and love Lamda, she is so straight forward.   But i digress...

 

Car has an AFR guage and usually watch to ensure I am not crazy lean.  But that thing gives my stomach lurches with the A/F curve over the RPM range... 16+ on grid idling, to 13.0 at 7k in 4th down the straight.  it is just crazy too look at..