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Re: airbox mods
>How to prevent water from entering ram air<
I had the following system installed, until I hit a snowbank and bent
Cut an opening on the airbox (Dremel works well) and attach 6"
flexible metal ducting (Home Depot), not the foil type as it will
collapse under vacuum. Run the ducting down to an opening in the
front spoiler. For water protection I used a spring valve (Home
Depot), which I epoxied into the flexible ducting.
If the end of the duct gets immersed in water (worst case), the vacuum
created in the duct will open the spring valve to the underhood air.
Thus, enough vacuum can never be generated to suck water up, but
otherwise the intake air comes from the relatively cool front of the
I had to put some steel mesh (Home Depot gutter screen) over the end
of the duct because I was sucking all sorts of leaves and junk into
the airbox. So, plan to clean the airbox periodically of dirt which
escapes the screen.
I would also recommend, though I didn't do it, that you insulate the
airbox and ducting with something to reduce heat soak from the
underhood heat. The foil covered fiberglass pads available at places
like RacersWholesale would work well.
Ian (Boston area)