I have a build for a customer that isn't working out like it should. I have tried numerous things to correct it. I have two cars almost identical and one it moving 100 g/s more air than the other one. The one down on power is acting really crazy above 6000 rpm. It is a 235-242 cam with btr 660 springs. In the log you can see where rpm just lays over and the maf starts jumping up and down from 330 g/s to 420 g/s back and forth. I have tried moving the maf sensor to different locations, changed the maf with another known good gm one. Same results. I have changed the exhaust on the cars since the one in question had flowmasters and changed them to bullets with no change. This is a fresh build from a motor builder. The only thing I can think of is possibly a bad set of valve springs. Take a look at the log and let me know what you think. Thanksno filter 2.hpl