pa11driver
MEMBER
1975 180J with a Lycon built ported and polished pponk 0-470-50 with 7.5:1 pistons and 3 blade 86” Mac 401. What static rpm should I be seeing? I see about 2550. Accelerates to 2700 in the climb after breaking ground. Seat of the pants doesn’t feel very powerful. About like the stock motor 180’s I’ve flown. It’s been this way as long as I’ve owned it. It has good compression, zero valve leakage. Governor tests fine and the prop blades are set at 9 degrees on the flat stop. Runs 24gph and about 2.5” of MAP less than ambient at wot.