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I think my advance curve must be at the edge of where it should be. Last weekend I got up into the mountains where it ran fine. I was riding with a large group and going rather slow. I noticed when I got out of the mountains and back on the flat and sea level my motor pinged like crazy for a few miles and then settled down. I am thinking that the 40 miles of down hill riding had caused the computer to lean out the mix to extreme and took a few miles to fatten it back up to stop the pinging. I still have less than 1000 miles on my build and lots of tweaking to do. I wish there was a Twin Tech for dummies guide. I keep trying to equate fuel injection to carburetors. There are a lot of adjustments with names that do not mean much to me. If they equated their adjustments with terms like accelerator pump, main jet , power valve , idle rich lean it would help us old dogs out. I see that some have become frustrated with dtt and are bailing out. I see that you have a Gerolamy TB did you have that when you were getting better mileage? I ask that in that I just bought one of those on ebay and have been thinking of trying it out, it came with 5.5 gm/s injectors which are larger than any I have tried before. On your engine build have you measured your quench squeeze above your pistons, mine is about .040 I was wanting .030 but could not come up with the right head gasket for the job. From what I have been reading on this form that is important to control pinging.
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