Piston deck height

[MikeK]

Hey guys, I'm a Model A guy, and have a T question.

New model A engines had an odd compression height on the pistons. When combined with the stock rod length, the pistons protruded 1/32" (0.0315") above the deck of a "perfect" engine. Did T's have the top edge of the pistons even with or above deck? If so, how much?

[Roger K]

The model T, when it came in late 1908 was the first car that had a removeable head (!) Nobody knew where deck height should be, so 'ol Henry let the pistons go .375 above the deck plane, so the edge of the original wide piston rings goes all the way up - thus no ring ridge on T engines - without measuring you can get fooled thinking the bores are good when they in fact are worn out..

[MikeK]

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Thanks Roger K. for the detailed answer.