Hope my pics loaded with this diatribe that again brings up the compression issue. What I’d like to ask is what’re the chances this blower engine will survive with hypereutectic pistons with comp ratio of .312 pistons, 312 crank, .010 deck, .020 shaved 471s and sandwich gaskets. In an earlier note I mentioned I’d lost 2 engines to detonation with same config except .02 shaved Gs, whereby I learned barnyard tuning was fatal to this setup. I then built 2 more engines in same config but tire dyno tuned them, they’ve performed perfectly for many years but they don’t like less than 92 oct. Mr. Mummert suggested max 6 lbs pressure. I have to consider I’m again being stupid and should transfer the complete blower config to another engine with forged pistons, (like I have that kind of money anymore). I’d just change the pistons except I size bores to pistons.



The second question is how to vacuum a blower engine crankcase without big bucks for a vacuum pump? In Seattle an engine running short hops daily that doesn’t vacuum the case well gains too much water in winter. The only thing I can think of is a suction line in an exhaust pipe. My pal Frank sez even a blower engine usually runs with intake vacuum so he doesn’t worry about it, however he has far more F models than he can drive every day so may not get the water problem. Anyone know where I can find the stock power steering assembly for that Twuck? Had one once but didn’t install it cause I wouldn’t waste power on the pump, shirt sleeves don’t fit anymore.











Dan in Seattle