I see a good amount of Evos that have the vents in the hood taken out, what I mean is the actual metal slits. I think it looks cool but is this even worth it and are they any downsides to doing this?

 

bump bump?

 

rain?

 

i saw one with the paint taken off to a steel shine on a tarmac black

 

I would have to think when the vents come out might be mostly for looks and also there should be some function to them.....

 

dont take it off unless u live in cali hehe

 

i have it off.i also live in vegas so it dosen't get that bad of weather here.i think it lets move heat out.when i have on(to wash the car)the egt seems a little higher with it on

 

I took mine off shortly after purchase and have been through torrential downpours in N.C. No problems yet.

 

I thought the vents might guide hot air out of the engine bay with less turbulence while driving.

 

well would the heat shield also come off, if so the hood might warp with the direct heat

 

no, you can take the vent off seperatly from the shield.

 

There are several threads about the vents (louvers). They are to prevent direct rain from getting on the exhaust manifold. This would cause stress cracks and eventually just split the cast manifold. Remember mitsu has to warranty the exhaust manifold too. If you live in a dry area (Cali, Vegas, Ethiopia) I would say take them out. If you are like me and live in a rainy area or snowy area keep them in.

I take mine out for racing to open the hood for better airflow. If you read into it the hump in front of the hood vent creates a (-) negative pressure zone above the louvers sucking the hot air out of the engine bay. Removing the louvers would only help to increase the max volume of air that can escape. This means cooler engine bay which means more power... how much is up for debate. Not enough for me to crack my exhaust manifold over.

Hope this helps.

 

I would also think that over time the engine would get kind of dirty.

 

True...it might get dirty over time but luckily I have a garage to park in. I don't deliberatly drive in the rain or spray water into the vent so my concerns are minimal.

 

The engine gets dirty when you drive down dirt roads. Not really so much when just sitting. The loovers only block dirt when the car is sitting. When your driving the dirt is picked up from thru the radiator and sucked up from under the car.