Was doing some high speed cruise testing at altitude with WOT and I noticed that the MAP would fluctuate. The MAP line has a pressure snubber installed and these are not small, cyclical oscillations, the MAP will jump from 22" to 26", then back to 22" for a bit and then down to 19", etc. Seems to only happen at WOT and high RPM (2700). When I run at say 2400 RPM, the MAP stays consistent. Anyone else ever seen this type of behavior?
Matt
Matt