Anderson Ed wrote:

Ken, I think you have a good point.  I notice before I vented my cowl
with Louvers along the side and was using auto gas that vapor pressure
would apparently build up in my small header tank on a hot day during
ground run up.  The symptom was the EFI fuel pressure would start to
fluctuate and decrease and even turning on the boost pump (approx 4-6
psi) would some time not over come this vapor pressure.  I have since
add the louvers which keeps the under the cowl temp down and also am
adding a cooling blast tube to blow air on the header.  However, once I
started using AVgas and with the louvers I have had no such recurrencies
of that problem. FWIW

Ed Anderson

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