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GT6 pistons in 1296 4 pot


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Plans are afoot for a quick rebuild of the Spitfire engine over winter and ready for the new season.

In the previous, rather hurried, rebuild I used County Spit pistons, but would have liked to use GT6 for their centre pin and consequent higher torque (if increased piston 'slap').
Due to the 1mm bore difference between a 1296 Spit and GT6, a STD GT6 piston would go into a +40 Spit bore.
But I'm considering a +20 GT6 piston in a +60 overbore on the Spit. Why not?

Stop me before I make the mistake… :)


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