Pietenpol-List: Travel Air Model A
Posted: Wed Jun 25, 2003 4:31 pm
Original Posted By: "John Dilatush"
Subject: Pietenpol-List: Travel Air Model ADick Hartwig. In an old post (June 9) you questioned the 7 to 1compression, hearing that 6 to 1 is about max. for the Ford A. I believe6 to 1 is the max you should run on babbitt bearings, but this enginehas insert bearings and pressure oiling. 7 to 1 compression should be noproblem for insert bearings. Some of these racers claim to get 100 hp ormore from the A, so I'll bet the compression they run is even higherthan 7 to 1. I need to call them to see if they will rework an alreadyconverted engine. Leon S.________________________________________________________________________________
Subject: Pietenpol-List: Travel Air Model ADick Hartwig. In an old post (June 9) you questioned the 7 to 1compression, hearing that 6 to 1 is about max. for the Ford A. I believe6 to 1 is the max you should run on babbitt bearings, but this enginehas insert bearings and pressure oiling. 7 to 1 compression should be noproblem for insert bearings. Some of these racers claim to get 100 hp ormore from the A, so I'll bet the compression they run is even higherthan 7 to 1. I need to call them to see if they will rework an alreadyconverted engine. Leon S.________________________________________________________________________________