It doesnt, much. But everyone should know, colder air is more dense, so more dense air = more oxygen = better combustion.

 

That Aluminum foil works great if you want to keep your intake hot. Good example... Baked potatos are kept in aluminum foil to keep them hot and reflect the heat inside to cook them.

 

that is a cool test... good results though

 

1 - if you have your intake directly below the battery box, within an inch of the bottom, you have no more chance of sucking up water then if you have it at the back of the engine compartment. i say this because my dad has a masters in doctorate in physics, masters in math and 20 years building cars, and he went through both some math equations and physical tests to show the likelyhood of sucking water in both locations. for instance, i run my air filter level with the bottom of the frame, but if it even looks like rain, i have the tube cut so i can run it even with the bottom of the box, ive hydroplanned through some deep puddles without ever having a problem there

as far as the difference is concerned, im not going to buy a warm air intake just to dyno it, but in 3 months i will be getting my car dynoed, i will make a run with the stock intake versus a custom cai, remember for info on the aem warm air intake(similar to the K&N and ebay intakes) SCC got 2 more peak hp at the wheelsfrom the aem, imestimating im getting between 3-5 at the wheels

12-volt, im using a couple of higher priced meat temperature sensors, i wasnt gonna buy special tools for this, and my gf recommended just using some of those, there acurate to a tenth of a degree, i have exact temps from when i recorded them if you want

 

Uh, why would you want to keep your intake hot?

 

mine is kept just above the radiator support. i've driven through about 6-8" of snow with no problems. as well as some really deep puddles with no problems cause the support pushes the water away and plus the filter i have, isn't open on the bottom (only on the sides) so that helps too.

 

Another example....putting Aluminum foil around a pop can, to keep it cold. The Aluminum foil is acting like an insulater. Whether it is holding in hot or cold air.

Although I still dont think that the foil really makes that big of a difference.

Shoot maybe he just wants some shine under the hood.

 

wtf is a pop can?

 

it is great to see people actually measuring IAT
when evaluating air intakes

keep in mind that it is best to be at full throttle
when evaluating IAT on intakes
because at part throttle,
and even more so at
idle and its low rpm and low MAP
heated intake air with higher IAT
will slightly lower fuel consumption
by letting the throttle blades open slightly more
which reduces vacuum and decreases 'pumping loss'

at part throttle
higher IAT and higher exhaust gas recirculation
improves fuel consumption
until miss-fire or detonation begins

most automakers (and aircraft engine makers)
prefer increased EGR
over increased IAT
because it accomplishes the same thing in fuel consumption
while DECREASING the threat of detonation
instead of increasing pinging like part throttle high intake air temperatures do