What I do know and can confirm (think I am correct) is how driver demand tells the pcm what torque I am requesting at a given pedal angle vs RPM. The inverse table lets the pcm know what load the engine should be at for that given torque demand. The throttle opens and the indicated torque is derived from the torque table for the actual load the maf calculates. My question or dilemma is understanding where the limits are that cause the throttle to close partially the open again causing the part throttle surge when boost comes in. In my case as the throttle pedal is slowly depressed while cruising in lets say fourth gear at 65mph, the vehicle begins to surge. Reviewing many data logs I can see that when the boost comes in and the load rapidly increases, the driver demand is basically steady but because there is a rapidly increasing difference between desired and indicated torque the throttle tries to compensate and creates the dreaded surge. Not that noticeable with lower boost applications but now that I am running a 15% overdrive with a 2.875 pulley on a 2.3 whipple its becomes rather violent. Following the standard way of calculating inverse torque and torque table calculations has no effect correcting the surge. Basic ford racing numbers in both tables. I have begun setting the inverse torque table to reflect the actual load as the boost comes in. Of course load rapidly increases right as the boost comes in and makes the inverse table a little steep in the 2500 to 3000 rpm range. Then correcting the torque table with the standard formula gives some odd results. The table looks normal until you calculate where the boost comes in. The torque numbers will begin to decrease from that point down the table. I am trying to find the answer to what actually causes the throttle to start to close. Mainly how the plausibility check between the tables work and at what point are those limits exceeded that allow the surge instead of just adjusting the throttle to maintain proper throttle angle to develop the desired torque(Load). Are the load numbers compared alone or are the torque numbers also included in the calculation that makes up the plausibility check. I can however eliminate any surge by simply lowering the driver demand table. The only issue with that is when boost comes at half throttle you better hold on. Not safe. I sure could use some direction.