CLASS RACER FORUM - View Single Post - Data Recorder Shows 300 rpm 'droop' After Car Launches???

Ed Wright · 06-16-2012, 02:36 PM

Acceleration Enrichment is like accelerator pump shot with a carb. Won't happen with a 2 step unless you don't have the pedal all the way down on the 2 step.
If using a 2 step, ignore the wide band O2 data there. It won't settle down until the car has moved. All you can do is add or remove fuel there to see what it needs. I would add fuel first, rather than pulling fuel from a lean condition. It's likely to look lean there, but that data won't be reliable with a 2 step. All you can do is test. I find most cars to be rich there, however. Get it too lean there and you can stick a ring, or worse.

06-16-2012, 02:36 PM	#14
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 390 Times in 170 Posts	Re: Data Recorder Shows 300 rpm 'droop' After Car Launches?? Acceleration Enrichment is like accelerator pump shot with a carb. Won't happen with a 2 step unless you don't have the pedal all the way down on the 2 step. If using a 2 step, ignore the wide band O2 data there. It won't settle down until the car has moved. All you can do is add or remove fuel there to see what it needs. I would add fuel first, rather than pulling fuel from a lean condition. It's likely to look lean there, but that data won't be reliable with a 2 step. All you can do is test. I find most cars to be rich there, however. Get it too lean there and you can stick a ring, or worse. __________________ Ed Wright 4156 SS/JA