A good test Steve, and seems to be rather conclusive regarding idle inlet air temps. Thanks for making the effort.
Though to be 100% accurate, it might be necessary though to use the same AIT sensor in both tests.
I'm not splitting hairs just for the sake of it, using the same AIT sensor would simply rule out what could be an important variable.
The airbox inlet sections
not behind the NACA duct on each side could of course be inhaling some hot engine comparment air
at idle. Which is where the Vipair's ducts are attached to the airbox, essentially ducting air from below the area where the access panel formerly was. Note too that once the access panel is removed to install the Vipair, hot air from the oil cooler can also now find its' way up into the airbox at idle. There
is a lot of heat coming off the oil cooler and at idle it must be rising right up towards the airbox inlet. (Another reason to use the same AIT sensor while testing perhaps.)
I did post some time ago in this thread my air temp measurement tests at 50 mph. There was no temperature difference at all at that speed with or without air from behind the facia being allowed to come up and into the airbox inlet. Not a huge surprise; to think that air behind the radiator is somehow going to work its' way forward at any speed in spite of air rushing through the radiator
and air rushing by underneath the car, is a bit much.
Inlet air temps aside, there's always the question of Vipair's ability to funnel high pressure air that has come thru the facia opening into the airbox at speed. Just how much of a contribution is that when the NACA duct provides the majority of air inlet area? Most Viper race teams were blocking off the NACA duct, if it's not blocked off would the little bit of high pressure air contributed by the Vipair find its' way into the airbox or be sucked out the NACA duct that's been known to backflow at speed?
All it takes to solve all the questions is enough on road, track or strip results coming back from Vipair users to prove it one way or the other. Problem is there's very little before/after performance data. I can't recall anyone saying their car was faster at the strip with Vipair, or that they were faster in roll-ons against another car after the installation etc. So it's still mostly conjecture.
The Corvette guys spend a lot of time talking about the various inlet systems available for their cars too. Debate's a lot of fun, I'd just like to see some real world/on the road (not on the dyno) results, and there haven't been many.
I mean how great would it be to bolt on something so simple and see real world/on the road gains?