Sandman GTI
Drag Race Newbie
- Location
- Tennessee USA
And hot air that's blended with engine air, then it gets heated across the top of the radiator. Yes it helps give you nice cold air. I have had it open for a year and drove through snow and rain. No issues at all
I think only blended air would come in at very low speeds.
The intake flow is enough I am sure to keep intake air fresh.
A lot of air flow through engine and under car when driving.
But as you stated not likely a big issue we could determine a reason to not open.