RG--
The narrow band just senses/indicates whether or not you are at stoichiometric mixture. Wide band gives you the actual ratio value through a fairly wide range from lean to rich. You haven't really tuned until you've done so with wide band. Very common to hook up to a wide band a/f ratio setup and learn that what was thought to be very well tuned is actually pretty rich, and/or finding that different throttle conditions vary greatly from rich to lean. There should be some difference, the trick is to get the right amount of difference for the right condition. In other words, partial throttle cruise should be leaner than WOT, and the best values for each of those conditions should be within a very narrow range.
Here is a really good article on tuning by a/f ratio, a little dated but still informative:
http://www.chevyhiperformance.com/te...age/index.html
Wide band is more expensive, and especially so if you have several vehicles you want to monitor. Narrow band is better than nothing.
Quote:
Originally Posted by Regular Guy
Crab, the speedometer and fuel will stay stock, and a 3 3/8" tach will go in the unused center tach hole.
I'm not familiar with air/fuel ratio meter--how do they hook up? What's the difference between narrow and wide band? I just did a quick look through a Classic Industries catalog and the narrow is under $100, the wide is in the $300 range for various gauge models...big difference!
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