Wide-open throttle tuning is the easy part. A naturally-aspirated engine safely produces maximum power when the air/fuel ratio is approximately 12.9:1; depending on boost levels, turbocharged and supercharged engines respond best to air/fuel ratios between 11.5:1 and 12:1. Engine AFR Idle Tune This document will walk you through the process of properly tuning your idle to the RPM’s you choose. Below is the process used for setting your idle to 896, however, this same process can be used to set any Idle RPM you choose by using RPM levels below and above the desired Idle RPM. Link to the module and Start the engine. This is what I should try to achieve; Idle 12.5 to 13.2, Cruiseing 14.7 to 15, Max Power 12.6 to 12.8. Column 1 is where I started with the A/F gauge. Carb was jetted up from stock. Column 2 is jetting back to stock for the 670. Column 3, leaning the jetting started to improve the ratio. C1 & C2 Corvettes - Fine Tuning Quick Fuel/BG/Holley/ProForm Carbs With Air Bleeds - Primary low speed bleeds supposedly change the rate at which off-idle circuit is activated (sensitivity), as well as changing the emulsification rate that happens in the idle fuel wells. A quality tune starts with accurate air-fuel-ratios (AFR), and the Power Vision uses an embedded function to help you dial in your AFR. This function is referred to as Autotune Basic and while you ride the Power Vision calculates the adjustments required to your tune to achieve an optimized AFR. In the transition zone, however, there is more airflow into the engine and we will need to tune with a richer AFR - Somewhere in the region of 14.0:1 would be pretty typical. As the boost builds and we run through the medium boost and into the high boost regions we’d progressively richen the mixture from around 12.0-12.5:1 down to perhaps 11.5:1. VTdW. The LambdaKing from RaytechAutomotive is a workshop tool for measuring the oxygen content of exhaust gasses, to enable fine-tuning of the air to fuel ratio (AFR). Featuring the latest LSU 4.9 technology wideband sensor, the LambdaKing is accurate, easy to use and an incredibly economical option for both the professional tuning workshop and the With good air/fuel ratio mixture control, we saw porcelain indications similar to spark plug reading from straight methanol. Although, starting at 6-percent, porcelain cracking and peppering occurred in a couple of cylinders due to uneven fuel distribution from our manifold and blower arrangement, even though the overall air/fuel mixture was 4965 posts · Joined 2004. #6 · Jan 7, 2013. The air-fuel ratio gauge read oxygen content in the exhaust, not the amount of fuel in the exhaust. They wont work well at idle but for cruise an WOT they can be a benefit if you really want to tune to maximum lean driveability. cadillacdave1. Yes; only passes if the air/fuel ratio is between 14.05 and 16.0. The carburator [ sic] (: Kaasutin) is a part for the Satsuma which can be found in the garage at home. It is attached to the cylinder head with 4x8mm bolts. The stock carburator has a separate airfilter that is attached with 2x6mm bolts. The purpose of a carburator is to mix air ADVERTISEMENT. When you talk to a tuner, you often hear about the air-fuel ratio (AFR), which is simply the relationship of air and fuel delivered, by weight. Typically, four-stroke engines desire Here is a link to the kit I have installed. It has the lights and the digital read out, I ignore the lights. This kit hooks up to the powerlogger, scanmaster and also is needed for fueling in the Turbo Tweak Speed Density chip. Some just get a wideband and no A/F ratio gage, the scanmaster also shows the a/f ratio.

how to tune air fuel ratio