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NismoMax80 · 07-03-2008, 02:47 PM

One thing that has prevented me from doing my underbody panel for 2 years is where does the air go that cools the radiator?
I am sure you guys read these 4 year old articles by now, but i couldn't find them discussed here:
Part 1 Testing Pressures
AutoSpeed Part1

air enters the grille opening to cool radiator

but if we seal off under the engine, where can the air go?

stock it leaves underneath

if we seal underneath, we should allow some venting, and ideally vent the front of the hood

but i am no way going to cut into my hood!

Part 2 Making an undertray
AutoSpeed Part2

Part 3 Helping air escape
AutoSpeed Part3

So no one has overheating problems sealing everything off? I understand this article is saying that once air enters to cool the radiator, without an exit, pressure is so high, no more air will enter.

To me we should have a vent somewhere on the undertray, located probably towards the front, maybe behind an AIR DAM, for engine air to escape???

i think i read someone has air come out into their wheel wells since it is already turbulent? so cut into the fenders' interior???

07-03-2008, 02:47 PM	#1 (permalink)
NismoMax80 EcoModding Lurker Join Date: Jul 2008 Location: PA Posts: 49 Max - '04 Nissan Maxima SE 90 day: 24 mpg (US) Thanks: 0 Thanked 6 Times in 4 Posts	Engine bay pressure? One thing that has prevented me from doing my underbody panel for 2 years is where does the air go that cools the radiator? I am sure you guys read these 4 year old articles by now, but i couldn't find them discussed here: Part 1 Testing Pressures AutoSpeed Part1 air enters the grille opening to cool radiator but if we seal off under the engine, where can the air go? stock it leaves underneath if we seal underneath, we should allow some venting, and ideally vent the front of the hood but i am no way going to cut into my hood! Part 2 Making an undertray AutoSpeed Part2 Part 3 Helping air escape AutoSpeed Part3 So no one has overheating problems sealing everything off? I understand this article is saying that once air enters to cool the radiator, without an exit, pressure is so high, no more air will enter. To me we should have a vent somewhere on the undertray, located probably towards the front, maybe behind an AIR DAM, for engine air to escape??? i think i read someone has air come out into their wheel wells since it is already turbulent? so cut into the fenders' interior??? __________________ my current project Last edited by NismoMax80; 07-03-2008 at 02:55 PM..