This week and Boss Noss tuning

I had cancellations on Mon Tues this week, I had reserved midweek to update my SF901 Software to read 02 sensor A/F ratio. Computer savvy Sean Ray and Bender Racing’s Terry Paine were a great help. This would enable us to read A/F ratio on complex return system EFI sleds like 900 Fusion (a multi-hour plumber’s nightmare) by simply sucking exhaust gas through a wide band O2 sensor. Now it’s easy to measure airflow CFM mechanically, then the new software should crunch the numbers and give us fuel flow lb/hr and BSFC without actually measuring fuel flow. Two strokes eat )2 sensors but the time savings justify that.
 I had a nostalgia Wildcat650 mod on the dyno Tuesday, we struggled with that since it was a mod sled solid mounted (solid mounts on most twins are a nightmare causing fuel foaming and fuel flow shutoff even while float bowls are going dry)). Today (Friday) was my first Firecat of the week– Tim Smith dialed in his Bikeman F8 with Bikeman mod single and Boondocker. He picked up 3 or 4 HP by removing his loud can and reinstalling his stock quiet muffler. I’ll let him tell which brand of obnoxiously loud can he removed. Then we dialed him in 11.5/1 from EGV opening to 8100, plus we made sure his part throttle cruise was a safe 13/1 or close to that.. And since he has a peak airflow-robbing 440 snopro intake, he is going home to reinstall his stock intake but will have to bump up his high RPM Boondocker settings to compensate.
The dyno will be humming this weekend, two sleds Sat and two or more Sunday. Monday AM David Crampton F7, then Tues a mod F7 and F8. Then hoping on Wednesday to have Bill Looneytoon dial in his Lancaster NY asphalt drag champion DD F9, now with monster single and stock muffler, to make it trail safe. The Boondocker is great for that–Bill can have an 85 octane program plus two others in his Boondocker box– maybe one for 92 and one for race gas. It takes only seconds to switch programs.
This weekend between sessions I will try to post our first Boss Noss tuning session. Hint: sometimes you are lucky enough to get what you pay for.