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Fuel Psi

 
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rtmarshall(at)osb.net
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PostPosted: Sat Feb 18, 2006 11:21 am    Post subject: Fuel Psi Reply with quote

Hi John, your fuel pressure is ? My fuel pressure had a habit of dropping from 25 Psi to about 16-19 and once in a while to about 12# and of course a short switch of the boost pump would fix it. It has been doing this for about 100 hrs and then the lyc fuel pump SB came out, apparently loose seat for ball check inside these certain # pumps. I replaced pump and now fuel pressure remains at 24-25 Psi at all times,I obviously had a defective pump which by the way complied with their last SB per ser# stamping. so I assume you have a good pump? Ron Munson at performance engines has the # of the pumps affected, Latest was service bulletin # 548A. But then of course you may know all about this and I am flapping my gums. So congrats on your flying your rocket and having a blast, your numbers sound similar to mine, I show 19" MP and 2150 rpm at 9K indicating 185 MPH average. To OSH and back here To O02 in the sierras I averaged 169 knots per gps data logger. These planes are fantastic performers for the mission. Bob Marshall N#999RM
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