Dyno Day..what a joke!
#41
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I agree it does come down to how comfortable you are with the data. But no system is accurate, repeatable and able to give the data at a rate suitable for a fast revving engine.
Less than 100 samples a sec really is insufficient IMO and I have not seen an O2 that can measure settle and latch a value in anything near that time. The processors can easilly handle it the sensors are the limitation.
Well good to compare notes and opinions with you.
Good luck
#42
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Here's a log of two passes I made while logging the wideband and narrowband on the right bank of the engine.
I missed 2nd gear on the motor pass but the data still shows how the NB mVs and the wideband AF ratio compare.
The nitrous pass was a 150 NX shot with a cold bottle (900 PSIG) so it was rich.
Notice on the motor pass how in 3rd gear the AFR is getting fat according to the wideband yet the narrow stays flat.
Magenta - Wideband (15 samples a second) units - air/fuel ratio
Blue - Stock NarrowBand units - millivolts
I get what you're saying, yes it is a crude tool if you lack a wideband, and it will let you know when you're in the too lean area.
Thanks for the info
I missed 2nd gear on the motor pass but the data still shows how the NB mVs and the wideband AF ratio compare.
The nitrous pass was a 150 NX shot with a cold bottle (900 PSIG) so it was rich.
Notice on the motor pass how in 3rd gear the AFR is getting fat according to the wideband yet the narrow stays flat.
Magenta - Wideband (15 samples a second) units - air/fuel ratio
Blue - Stock NarrowBand units - millivolts
I get what you're saying, yes it is a crude tool if you lack a wideband, and it will let you know when you're in the too lean area.
Thanks for the info
#44
Banned
Join Date: Feb 2008
Location: I moved to over there
Posts: 325
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![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Here's a log of two passes I made while logging the wideband and narrowband on the right bank of the engine.
I missed 2nd gear on the motor pass but the data still shows how the NB mVs and the wideband AF ratio compare.
The nitrous pass was a 150 NX shot with a cold bottle (900 PSIG) so it was rich.
Notice on the motor pass how in 3rd gear the AFR is getting fat according to the wideband yet the narrow stays flat.
Magenta - Wideband (15 samples a second) units - air/fuel ratio
Blue - Stock NarrowBand units - millivolts
I get what you're saying, yes it is a crude tool if you lack a wideband, and it will let you know when you're in the too lean area.
Thanks for the info
I missed 2nd gear on the motor pass but the data still shows how the NB mVs and the wideband AF ratio compare.
The nitrous pass was a 150 NX shot with a cold bottle (900 PSIG) so it was rich.
Notice on the motor pass how in 3rd gear the AFR is getting fat according to the wideband yet the narrow stays flat.
Magenta - Wideband (15 samples a second) units - air/fuel ratio
Blue - Stock NarrowBand units - millivolts
I get what you're saying, yes it is a crude tool if you lack a wideband, and it will let you know when you're in the too lean area.
Thanks for the info
Thanks