Re: Carb tuning with wide band Oxygen Sensor by bracketchev1221 on Wed Jan 29, 2020 11:00 pm Only one I used years ago was moved from … I am asking because I am finishing up the wiring and have headers with the O2 bungs installed already. 99 I just put an FCR41 on my LC4 and am tuning the carb. 3891) includes the DLG-1 gauge, two wideband Bosch LSU4.9 O2 sensors, two 8-foot sensor cables, LC-2 Wideband Controller, two O2 sensor weld-on bungs, black/silver bezel, black/white faceplate, serial program cable, and installation manual. Tuning with a Wideband enables you to seriously dial in your carburetion system. I'll be installing an air fuel gauge with wideband O2 sensor this afternoon to really try to nail down my idle, part throttle and WOT. The stoich air/fuel ratio for standard gasoline is around 14.7:1 (lambda 1.00). We installed a Holley Wideband O2 sensor and controller into our circle track project car Madd Maxx, so we could closely monitor our air/fuel ratio at different tracks and in different weather conditions. 10 Posts . The DLG-1 Dual Lambda (AFR) Gauge Kit (part no. No more guessing at changing conditions, I can see them instantly as I ride. This tells us how rich or lean the engine is from stoichiometric. I'm running a Holley HP 750 carb with pretty much out of the box set up.the engine runs pretty strong and smooth overall with no stumbles or hesitations and a good idle but i feel like there's something left on the table in the WOT. Our knowledgeable sales engineers can help you select the right system for your application, and we support what we sell, too! Hello, I've tried to tune 2 different carbed engines with my wideband O2 sensor. The wideband can even be used to monitor AFR for proper carb jet tuning. DIYAutoTune is a fully authorized, stocking dealer of Innovate Motorsports Wideband O2 sensor products. I was thinking that I would use these for the stock type narrow band sensors and add a new bung in both banks just after the headers in the collectors for the wide band sensors. It is important that you understand the “why” because when you make a change, observing how the engine reacts to the change will tell you if the change was a good one, didn’t matter, or you went the wrong way! Rich at 1/4 throttle, good at 1/2, lean at 3/4... no guessing. Note: When using a narrow-band sensor, a 4-wire sensor should be used so that you get the built-in heater. Installation is fairly easy and straightforward. I was planing on buying a wide band air fuel ratio gauge to help tune the carb on my Y block. From what I understand, I can weld in a "bung" into the header and install the sensor, run the wires inside the car and watch the gauge then make changes in jet size as needed. I sprung for a wideband O2 sensor and it has been a complete life saver. GlowShift White 7 Series Digital Wideband Air/Fuel Ratio AFR Gauge Kit - Includes Oxygen Sensor, Data Logging Output & Weld-in Bung - Blue LED Display - Clear Lens - 2-1/16" 52mm 5.0 out of 5 stars 5 $164.99 $ 164 . If you are interested in tuning your Seca II's pilot jets, at idle, with the throttle closed, a narrow-band O2 sensor will get you close and will save you the expense of a wideband O2 sensor. Wideband O2 Sensor. As an added bonus, we got our hands on Holley’s Carb Tuning Video on interactive CD to help us fine tune our Holley 4412 racing carb. By detecting the amount of unburned oxygen content in the exhaust after combustion, a wideband sensor is able to indicate the engine’s actual air/fuel ratio. This article contains both the “how” and the “why”. Learning a ton and looking forward to tuning with the HP Tuner Pro. Discussion Starter • #1 • Sep 5, 2009. 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