Depth of valve cutouts?
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I'm not sure if this helps - may have nothing to do with original Sprint pistons, but A-type pistons, as illustrated on p191 in Miles Wilkin's book, the cut outs are inlet 4.8mm and exhaust 4.4mm deep. This was measured off Hepolite 21093A pistons.
Malcolm
Malcolm
1966 Elan S3 Coupe
1994 Caterham 7
1994 Caterham 7
- englishmaninwales
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