Extreme Speed Prop Planes Discuss the need for speed with fast prop planes (Screamin Demon, Diamond Dust, Shrikes or any REAL sound breakin'''' plane)

dubb jet 56

Old 02-14-2021, 05:54 PM
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Default dubb jet 56

Aquired a jet 56. noticed that the piston when at bottom of stroke is not even to bottom of the sleeve it at least 1/8 to 3/16 above it leaving the exhaust port looking closed off
anyone experience this??? appreciate help rich barile thanks
Old 03-27-2021, 06:05 PM
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Let me get this straight:

If the piston is all the way down, about 1/8" of the exhaust port is still covered by the piston?
Old 03-28-2021, 08:21 AM
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I'd be happy to check it out for you if you would like to send it my way - PM me
I have been running Dub JETT motors in my Q500 planes (per avatar) for near on 20 yrs
Old 03-28-2021, 02:43 PM
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Sounds like the sleeve is rotated 180 degrees?
Old 03-31-2021, 02:08 PM
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Is the engine new? I just pulled the header off of one of my many small block Jett engines, and the piston sits quite a bit below the bottom of the exhaust port at BDC. If your piston is up too high in the port something is seriously wrong. How about posting a couple of pictures.


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