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I'm probably conservative in my goal of .160" wall thickness especially since it is one spot and the rest of the cylinder is at least .210". The remaining cylinders have at least .200" wall thickness. I guess I need to decide how much cylinder wall thickness I am comfortable with. I can probably get by with a 2mm overbore to 94.5mm giving me a .146" wall thickness at the thin spot-probably fine since everywhere else would be at least .160" thick. I read of boosted big blocks with .100" thickness. I also read .060" is the minimum between moving parts so I was going on that. Again probably conservative.
Edit: this engine is so conservative (probably 250-275hp and 5500 rpm if I'm lucky) I could be fine with thinner cylinders in a few spots given the thinnest cylinder is .185" in one spot. I can't measure the thrust side since the coolant passages are on one side or the other. It's .185" on one side and about .240" on the other. The "T" indicates top.
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 Tony H
W111 280SE 3.5 Coupe
Manual transmission
Past cars:
Porsche 914 2.0
'64 Jaguar XKE Roadster
'57 Oval Window VW
'71 Toyota Hilux Pickup Truck-Dad bought new
'73 Toyota Celica GT
Last edited by Tony H; 10-21-2022 at 01:34 AM.
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