Can you post a log? I don't think it's related to timing or IATs. Vbox data shows the 60-70 is a smidge slower then 70-80 which doesn't make sense.I know what you are talking about, my car did that too where it felt like it wasnt getting full power and the power was surging on and off, I believe this is where the IAT's start to skyrocket and the computer starts to pull timing so the engine doesnt see knock. Now with the FMIC upgrade my car pulls hard the whole time without any surging.
Unfortunately, I don't bud. I know there were some folks who beat the topic up awhile ago...
Sorry guys work has had me tied up. What are we looking for? This run is 0 - 92.04 with a 2475rpm launch. Wheel spin can be seen at start of graph.
Is there shift data in your log? Maybe that first small rpm decrease is torque convertor clutch and then the big drop is second? And then do to load the variable cams are doing what they are supposed to be doin?After reviewing all data collected during this run I found the Variable Valve Timing Intake on bank 1 & 2 mirror the hump or vice versa... This is shown in the black line w/yellow shadowing. Banks 1&2 overlay tightly.