Did some more pressure measurements on the first gen RX7
today. Since the pressure in the cowl was high
I thought I would try opening the cowl flaps.

No luck. Only a minor improvement in under hood pressure.
3.7" H2o in front of the rad 2.7' H2o behind the rad and
1.8" H2o on the firewall. Essentially the same as it was with the
hood closed. I surmise the reason for this is the pressure
at the base of the windshield is real high. Air is going in
the engine compartment from the base of the windshield and not
out as one would think.  We shall see with the next test.

Paul Lamar
 
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