Originally Posted by shiv@vishnu
Up top at high RPM, it's normal to run that rich. But if you are seeing those AFRs in in the meat of the powerband, something is wrong. Either you are injecting too much meth. Or your meth mix has too much water.
But it is a closed system, it will target the same af ratio.
I sprayed meth with the COBB, m10 nozzle, 100 percent meth, 14psi falling to 13, af didn't change. I also used the same set up with windshield washer fluid which is mainly water with some meth mixed in, af didn't change.