I agree it's NOT an ideal situation, but I think saying that it will break the crankshaft is a bit dramatic!
The weight of the pistons (should be equal) is MUCH more important than individual cylinder compression.
And he did NOT post the weights of the pistons he used. Even though the CR is different the WEIGHT of the pistons MAY be the same... or NOT!
The other factor would be if the higher-compression cylinder pre-ignites with the gas being used and the load on the engine.
About 20 years ago I got an SBC Chevy 350 block from a machinist friend that had 2 cylinders bored .060" OS, and the other six standard.
We put it together with 6 OEM pistons and 2 aftermarket OS pistons. We weighed them and all 8 were darned close in weight even with the different size and manufacturer.
Some "experts" said it would shake like a *@&#^$%. Others said it would be OK.
It was. It runs about as smooth as any other run-of-the-mill SBC.
I still have the old pickup and it still runs.
(NOT saying what we did is good practice or that the engine is as smooth as a "blueprinted engine", but it did work OK for our non-racing purpose!)
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Today's Featured Article - My Ford Golden Jubilee - by Troy Estes. This article is about my '53 Ford Jubilee and a story that starts with taking the tractor to my brother's Starter/Alternator Rebuilding shop for a wiring fix. The generator was shot as well as all the wiring. I dropped off the tractor expecting a transformation from a 6 volt to a 12 volt system utilizing the original generator housing, and a total rewiring of the whole tractor. The front end center pin bushing was worn also so I ask that they replace it if they had time. Well, that�s wha
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