I would make this more concise and put it up on your website in the description for the systems. Pretty much answers any and all questions I had when I clicked into this thread for the first time (ever) 5 minutes ago.Every mass airflow sensor has what's called a maf transfer function. This is a table of output (hz or V) vs an airflow. It's the function used by the ecu to make calculations based on engine airflow. When you take a maf sensor out of the original intake and install it in a larger tube, it will require more airflow to get the same original output. This is why a tune is required with most good performing kits.
Some kits that don't require a tune either use OEM size tube or and OEM maf sized insert so the maf output is "close" to stock and they let fuel trims correct their errors. This way usually results in very little gain as you neck down the pipe size to make it run.
Since we manufacture mass air sensors we can calibrate the sensor to have the output of an OEM maf installed in the OEM air box, even though our maf is installed in a 120mm tube.
With our tune required kit we supply the correct transfer function that you will end up with when you install your factory maf into our 120mm tube.
This means you don't need to build a tune for our kit. You only swap the OEM maf transfer function with ours. We can do this because we have the correct equipment to extract the exact maf transfer function for a given maf system. We provide this data to FORD, Roush, Whipple, EPA, and a bunch of others.
This also means you can take your existing tune and just change the maf transfer function for our kit to work with your tune.
All the other cold air companies that require a tune spend hours on the dyno tuning and guessing what they think the maf transfer function is for their kit.
Temps.. We see about 2-3 degrees over outside air at 65mph and about 10 over at 25mph. We have tested this for years and an increase in flow ALWAYS makes more power than a more restrictive system that attempts to pull all the air twice as far away because it's cooler. Our kit picked up 20WHP in a room on a dyno sitting on one place with a fan on the front of the car. I assure you it makes more with the car actually moving down the street.
Nice to see actual engineering work being performed here. Seems nowadays its more of how good are you at marketing, vs how good you are at designing functional components. Will definitely be ordering a PMAS intake when the time comes