Quote:
Originally Posted by scarceller
Your WOT AFR numbers are fine. At this point just set idle mixture on the 1-2-3 side at 0.96lambda and you are done for now.
Your 27MPG on the highway is a very good MPG for these engines. Why you see 10MPG city is very strange if it's not the brake issue?
The 40i40e cam is actually a slightly less aggressive cam than the factory 964 cam.
I never set cams using overlap method because it's not perfect, it depends a lot on having the valve lash properly set. I always prefer setting a cam using the LCA method, where you find the exact point where the cam achieves peak lift, this method does not care about the valve lash. If the cam is a 113 LCA and you want it installed perfectly and not retarded or advanced it's very easy to do. You just set it so peak lift occurs at exactly 113deg ATDC on the intake lobe and your done!
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Will see in a few days where city mpg lands. From looking at my fuel & odo gauges right now, 18 mpg does not appear to be happening...but it's early. To fill, I allow pump to auto shut off so might not have started with a truly "full" tank. Westar fuel (using a particular pump) is currently being tested.
Thanks for 964 cam comment. Had you said "Yes, they gobble gas," that would have been disappointing. Your peak lobe timing technique... wondering if this requires rotating the cams forward and in reverse to determine a lobe's precise peak (like determining precise piston peak.) If so, wouldn't chain slack play in? If it does, you must compensate. (How?)
Adjusting mixture to land 1-2-3 idle at 0.96 later today---thank you.
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