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REFLECTOR: Need advice on air scoop
I'm installing a Chevy V-6 engine in my Velocity. After 2 years of R & D,
we finally start assembly tomorrow. This is not your grandpa's Chevy.
Most of the R & D involved an odd-fire Crower 4340 degassed steel crank and
cam, and a reliable fuel injection system with limp-home mode. Based on
computer dyno tests, it should all work. We'll do a dyno test in about two
Here's where I need help. I just finished installing a 1997 Dodge Stratus
heater box in the nose of my Elite. Weighs 12 lbs. and has a 300 PSI air
conditioning core that will circulate coolant from the engine. Coolant
runs through the ducts via 3/4" ss braided teflon hose mated to the core
with AN fittings. The heater box fits into the nose like a glove, and
delivers heat into the cabin via a scat tube that runs into the keel. I've
also molded a separate glass tube that delivers cold air into the cabin.
Since Tim England has experienced trouble with long taxis in hot weather,
I'm hoping this nose heater (it has a tornado-like electric blower on it)
should help cool the engine during taxi in the summer time. To dump hot
air outside the cabin, I crafted a plywood/glass box with a flapper valve.
The same intake is used for both heater and cold air, and is located on the
floor about 3" behind the landing light. I have NOT cut a hole yet.
Since this is the high pressure side (bottom) of the nose, how big should I
make the intake? The actual size of the heater intake plenum is 4" wide by
6" long. I made a plywood/glass box that mates this plenum to the floor
I have three questions:
1. Should I make a NACA scoop for this inlet, and if so, how big should it
2. Would it be a big mistake to make a 4" long rectangular hole, and not
make a NACA scoop?
3. Is there any practical way to keep bugs (insects) from entering the
Thanks in advance for any tips.