Originally Posted by regisbou

In that case get a meth/water injection kit. This will only keep the cyl head temps lower but in tern it will lower the air temp as well.

A little droplet of water will absorb a lot of heat without getting hot fast enough to match the temperature it is absorbing by the time combustion takes place.

Meth Injection, ram air setup, removal of butterfly valve in TB/intake port. Manifold wise I have no clue, but those three things that I just previously stated should reduce temps and improve velocity.

Faster air = cooler air. Higher octane = better cooling.

So for cheap mods, channel some HVAC to the CAI or whatever intake you have via the front bumper, you can always get a drain plug to plug the hose when it rains. Get some Octane boost (not because it will give you more power but because it will reduce cyl head temps intern making the air cooler (denser) while being compressed and therfore giving you your power back or giving you more depending on your ECU learning curve.

If you run 91 octane try finding a gas station with 93. If not just get 89 and put in some octance boots (STP) it should up it about 5 numbers so around 94.

Thats all I can think of other than getting a new intake manifold