Had a lot of fun today with the meter and all tghe tubing. One piece looked like a bong and received more than a curious glance from the Arkansass Highway patrol.

I will have other wconclusions when I get back home but one thing is clear. Ram air is not a solution for adding reliable performance or HP.

That said. I made one change in tghetest equippment. The PVC collector horns and tubing are 4.0" insteadof three.

All tests were taken at 80 MPH except for a series of Pitot samplings at 60 thru 100 MPH
PITOT TUBE 10.0 " IN FRONT OF GRILL
60 MPH = 3.2 inches of water
75 MPH = 5.2 "
80 MPH = 5.5 "
90 MPH = 7.5 "
100MPH = 9.1 "


80 MPH tests
Pitot tube 10'0" in front of grill = 5.5"
Pitot tube inside grill /rad cavity= 2.0"
4.0" short horn (4.0") @ windshield = 6" to 15" turbulent
4.0" long horn (24.0") @ windshield = 7" to 15" turbulent
4.0" short horn in clear air = 4.5"
4.0" long horn in clear air = 6.0"

1.0" opening with gradual taper clear air = 5.5"
1.0" opening with gradual taper windshield head = 6.0" to 8.0" Turbulent

5.0" to 6.0" of boost might not be supercharger power but many turbos work in that range. Maybe just maybe........this could work.


But?????
Something we noticed, that I had not considered, as we approached vehicles in front of us the pressure dropped dramitically. So just when you need a boost for passing, you are lame until you get clear air.

Second thing we noticed. If you are passing a truck, you get turbulence the whole time you are passing the rig.

Turbulence will rob HP and without some baffle control you lose any boost you might have thought you gained.

Finally, holding the intake horns in clear air exhibited a force that I also had not considered. Any scoop or intake horn must be properly designed and placed so as not to increase drag. At 90, 100 MPH it was all I could do to hold the 4.0" pipe in the airstream. This suggests that any power gains could be cancelled by increased drag of the collector.

No conclusions tonite. I will wait until I get home and have some time.
Except this, ram air works, I just don't think, in an automotive application, it is useful.

Onehundred 80, tell the Labs they can go back to work.


roadster with a stick