theoretically, a Short Ram
will give you more power at top end, CAI
will give more gains down low.
The same principle applies to Intake
runners, the longer the runner length, the lower in the power band the gains will be noticable.
This is why most import drag cars run Intake
manifolds with short runners, to place the maximum gains at the top end, where the engine makes the most power.
The problem is heat, with a Short Ram
, you need to worry about hot air being drawn in from under the Hood
, which is an easily corrected problem. Simply use heat shields or a cold-air box of some sort to duct cold air from outside the engine bay to the filter. adding an insulating wrap of some sort to the Intake
tubing will also keep the Intake
I am in the process of fabricating a cool panel/airbox to replace the plastic over the radiator support that will do this, I currently have an aluminum filter heatshield in place. it does alright, but the filter top still sucks in hot air, and the factory plastic above the radiator doesn't help to route in the cooler air.
If you remove the plastic piece above the radiator, cool air from the front grille will be routed towards the Intake
, especially at speeds above 35 MPH. just pop the 3 plastic clips that hold it down, remove it, and reinstall the clip that is shared between the passenger side plastic & the radiator piece (without the radiator plasic of course).
Take the car for a spin like that, then after the cruise, pop the Hood
and feel the shortram Intake
, it will be MUCH cooler. you will probably notice the car seems to pull a bit better too. This is because there are spaces that air can flow from through the front grille opening, to the inside-front of the engine bay when it's removed, especially if you have the action package or another aftermarket bumper.
My cool plate idea will more efficiently route the cool air to the filter, and act as a heat shield (keeping heat from the radiator, engine and tranny away from the filter) it should also keep the filter free of moisture in heavy rain (not that that's a major problem to begin with).
another idea is to set up a RAM AIR configuration: route a lenght of flexible hose (like dryer ducting) to the filter. it's best if you use an open top filter that can accept a cold air duct. there are many that can do this. the other end of the duct goes to the front of the car, much like a CAI
, with the opening going to a fog light opening or the front grille. at highway speeds, cool outside air is forced into the filter, cooling the Intake
charge, and is much less likeley to hydrolock like a CAI
(because there is a natural pressure drop at the filter if water gets sucked in, the filter draws from the surface area with less restriction, under the Hood
) this works quite well if it's done right.