Silver86 Posted February 6, 2015 Report Share Posted February 6, 2015 I have installed an air/fuel ratio gauge and notice that under WOT, I go only as rich as around .76-.80. Is this rich enough or do I have a problem? (It's only the first green bar on a standard narrow band air/fuel ratio guage). My car is running stock fuel system at about 10psi, with Walbro 255 pump. Thanks! Link to comment Share on other sites More sharing options...
Skullzaflare Posted February 6, 2015 Report Share Posted February 6, 2015 scrap that gauge and buy a widebandthat gauge is a light show, if its in the green you are richer than 14.7, if its in the red you are leaner than 14.7. only thing it tells you Link to comment Share on other sites More sharing options...
importwarrior Posted February 6, 2015 Report Share Posted February 6, 2015 i agree get a WIDE band. Link to comment Share on other sites More sharing options...
ucw458 Posted February 6, 2015 Report Share Posted February 6, 2015 .76-.80 are lambda measurements. Most people in the US aren't familiar with lambda and wont want to convert the readings all the time. A proper wideband will give you a different measurement. Like 14.7:1 for example. 14.7 lbs of air to 1 lb of fuel. Above 14.7 is lean and below 14.7 is rich. When cruising 14.7 is ideal. When boosting you want the AFR around 12:1. The rich mixture cools the cylinders and prevents detonation. Link to comment Share on other sites More sharing options...
aconro Posted February 6, 2015 Report Share Posted February 6, 2015 It common for people to use lamda to tune with. Most gauges have the ability to switch between lamda and afr. I know my aem wideband is able along with some of innovate's gauges. .8 lamda = 11.76 afr and .76 lamda = 11.12 The very general formula..afr = lamda * 14.7 Link to comment Share on other sites More sharing options...
Skullzaflare Posted February 6, 2015 Report Share Posted February 6, 2015 .76-.80 are lambda measurements. Most people in the US aren't familiar with lambda and wont want to convert the readings all the time. A proper wideband will give you a different measurement. Like 14.7:1 for example. 14.7 lbs of air to 1 lb of fuel. Above 14.7 is lean and below 14.7 is rich. When cruising 14.7 is ideal. When boosting you want the AFR around 12:1. The rich mixture cools the cylinders and prevents detonation.i was going off his mention of location on a narrowband gauge Link to comment Share on other sites More sharing options...
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