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428 Big Thanks To Tunehouse


TURBO4LT

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  • Member For: 21y 5m 26d
  • Gender: Male
  • Location: NSW

FYI, when logging via the LM-2 on the street I see leaner AFR's than what I do on the dyno. I had initially set AFR's to 11.8 when tuning on the street, however when I jumped on the dyno I was seeing just over 11. I initially thought it was a loading difference between the dyno and street, however I went and logged load on the dyno and it's pretty much identical to what I'm seeing on the street. My boost does drop in the high rpm on the dyno compared to the street but that does not explain the mid RPM difference. After looking at some AFR data for different instruments the LM-2 did show leaner than actual AFR so it may just be a difference between instruments. Anyways just don't be alarmed if it's a little leaner than expected as you know you're working with a very good tune. Cheers and enjoy!

edit....in saying power runs, I gather you're going on the dyno and not using your LM-2 AFR meter...whoops!!

Funny that, last time I ran the car on the street with the LM-2 I actually got slightly richer readings than the ones I got on the Dyno although only just, Ill let you know how it goes if the rain stays away.

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  • Member For: 19y 7m 5d
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Interesting and good to know. At least your's are close! I did find the afr difference between boost levels less noticable on the street....but it was clearly evident on the dyno. Have fun :-)

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