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Ed Wright · 05-31-2018, 10:28 AM

Marty, if your car is EFI, make a big change at like 6000 RPM, then see what RPM it shows up on your logger. I mostly look at high gear, since the A/F vs RPM error is going to be greater in lower gears due to the RPM increasing so much faster. And, I assume, if you leave off a 2 step, that your launch A/F looks much leaner due to the misfires caused by the 2step. Misfires put more oxygen in the exhaust, and our Wide Band O2 sensors calculate the air/fuel ratio by oxygen content.
I hope if you already knew all this, I didn't offend you. Maybe somebody did not know. Not trying to be a know-it-all.

05-31-2018, 10:28 AM	#7
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 390 Times in 170 Posts	Re: A/F readout delay Marty, if your car is EFI, make a big change at like 6000 RPM, then see what RPM it shows up on your logger. I mostly look at high gear, since the A/F vs RPM error is going to be greater in lower gears due to the RPM increasing so much faster. And, I assume, if you leave off a 2 step, that your launch A/F looks much leaner due to the misfires caused by the 2step. Misfires put more oxygen in the exhaust, and our Wide Band O2 sensors calculate the air/fuel ratio by oxygen content. I hope if you already knew all this, I didn't offend you. Maybe somebody did not know. Not trying to be a know-it-all. __________________ Ed Wright 4156 SS/JA