Lots of threads on various forums about avgas in automobile engines.
The 80 octane avgas (IF STREET LEGAL, WHICH IT ISN'T) would probably perform better in a 235 than 87 octane pump gas.
The 100 octane avgas is not going to perform well at all, unless the 235 is highly modified (maybe 12 to 1 compression, and timing BTDC of 40 degrees
)
But the true believers will always believe, so:
Race gas IS LEGAL and some of it is 100 octane. Buy a barrel of racing gas and try it. HINT, don't fill the tank, because you are probably going to need to drain what you put in the tank, and sell it to your neighbor with the high performance Corvette.
And after the exercise is finished, if the 100 octane didn't destroy the engine, try the lowest octane you can buy at a name brand station.
And just for the record, my 450 HP 350 (measured 10.38:1 compression, not advertised) cruises just fine on 91 octane. If driven in anger, runs great on 93 octane. Runs well (but less well, especially until the engine is fully warmed) on race gas, and yes, I DID try it.
Remember, Dr. Werner Von Braun allegedly stated that 1 test is worth 1000 "expert" opinions. Try the test.
Jon.
