Had an awesome day of riding friday, saw my old King Kat take out a tree, helped friends get unstuck, and pulled some fairly long hills with 2-3 ft of fresh snow.
However, I climbed a pretty good hill and looked down and noticed that my a/f was up and down between 12.6 and 12.9. So I richened the box up. Still 12.7-12.9.
I rode it and still felt lean. Finally put it to full rich. Still 12.7 - 12.9.
Fuel pressure was around 47 psi @ 15 PSI boost. It has been that way all year.
Keep in mind that all this tuning was done @ 9500 to 10,000 ft elev. I left it @ full rich all day. I never changed it til we got around 7500 ft, which was about a mile from the Parking lot. Things had dramatically changed. It was running so rich that it fouled both plugs. I leaned it back to were it was originally. I could get it to pull a little more RPMS but still was very blubery.
My question is why did it go so lean up high to were the box had to be @ full Rich to run, and normal tuning down low. I always thought it was the other way around leaner the higher and lower the richer.
Could it be a bad Pressure Regulator? BTW it is a Turbo Smart 1:1. Thinking about upgrading it to a 2:1 or 2.5 to 1. But not sure if the regulator is the problemo.
However, I climbed a pretty good hill and looked down and noticed that my a/f was up and down between 12.6 and 12.9. So I richened the box up. Still 12.7-12.9.
I rode it and still felt lean. Finally put it to full rich. Still 12.7 - 12.9.
Fuel pressure was around 47 psi @ 15 PSI boost. It has been that way all year.
Keep in mind that all this tuning was done @ 9500 to 10,000 ft elev. I left it @ full rich all day. I never changed it til we got around 7500 ft, which was about a mile from the Parking lot. Things had dramatically changed. It was running so rich that it fouled both plugs. I leaned it back to were it was originally. I could get it to pull a little more RPMS but still was very blubery.
My question is why did it go so lean up high to were the box had to be @ full Rich to run, and normal tuning down low. I always thought it was the other way around leaner the higher and lower the richer.
Could it be a bad Pressure Regulator? BTW it is a Turbo Smart 1:1. Thinking about upgrading it to a 2:1 or 2.5 to 1. But not sure if the regulator is the problemo.
with a water to air cooled battery and fuel pump.
