Rose and Gretchen have been in Virginia for the last week and a half helping my oldest boy and his wife. She just had a baby. My daughter in law had it, not Rose. My days during this time are to get up in the morning, put in an hour or so on the bike, go to work, get home and have a beer, then work on the bike till 9 at night. This is outdoors work. Fortunately the weather is good. The parents of one of Gretchen's friends see this. They figure I am not eating all that good and they invite me over for dinner. All of the steak, chicken, fish, potatoes, etc I can eat. Beer, too. That is a nice thing for them to do.
The bike is run on the dyno with all sorts of main jets. The operator selects the ones he feels that give the best power. These are a pair of #138's. The curves are real close together on the dyno graph and tangled up like worms making love. It is hard to make and judgements except to pick the ones that work best.
We look at the mixture curves and pick some jet sizes that are far enough apart to look at the curves and to compare them. The 132 jets are the final selection and they are the red curves. A pair of 128 jets are two sizes smaller and they are the green curves. A pair of 140's are three sizes bigger and they are the blue curves. Note that that are about one part apart on the mixture curves.
The curves show me that I lose big power if I go leaner than the 132's. They also show me that it does not make a big difference if I go richer. This is a big help. Tomorrow I will figure out which jets to put in for B'ville.