Can you tune with a narrow band? Or does it absolutely have to be a wideband?

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1965 Plymouth Belvedere II Turbo Project - SOLD
2002 Subaru OBS
1995 Lexus LS400 Race Car

Naturally Aspirated Carburated engine "roughing in the settings and tuning" = yes

Boosted, EFI, etc... = No (Although Ehrenberg did write in one article that you could tune the EFI setup on the wideband, then save the $$$ by letting it run on a narrow band...I think that was somewhat optimistic for long term use and was not a boosted engine).


-D.Idiot

Narrow bands behave like an on/off switch. They switch on above 14.7:1 and off below that. Great if you're trying to hit 14.7:1 on the nose, not terribly useful for any other air/fuel ratio. And you typically want to hit a much richer air/fuel ratio under boost.

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"Mad Scientist" Matt Cramer
'66 Dart - turbocharged 225
My blog - Mad Scientist Matt's Lair

Not useful at all. Before widebands I tuned a couple of engines using a nb sensor, but it is basically impossible. You can set a good idle and cruise mixture but otherwise no.