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Old 05-12-2008, 05:48 PM   #33 (permalink)
Duffman
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Join Date: Mar 2008
Location: Edmonton, AB, Canada
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Quote:
Originally Posted by monroe74 View Post
duff: "What I am trying to get you to do is find the transition out of the red region."

I think that's what I'm also trying to get myself to do! Trouble is, I think I don't really know how to get all that nice data with the simple instruments at my disposal. Maybe if I think about it some more it will dawn on me. I guess I don't really have a clear grasp of the methodology used to create those graphs.
How serious do you want to get (meaning cost & effort). There is a lot of expertise on this board, you just have to ask the right questions. Off the top of my head, the throttle position sensor (you car should have one?) gives a 0-5V reading based on the throttle opening. You already have the wide O2 sensor hooked up. Will this give you a BSFC map? No, but you can map out the A/F ratio which may help find efficient vs inefficient operating regions.
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