Richard_M Posted December 7, 2013 Share Posted December 7, 2013 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… :)Richard Quote Link to comment Share on other sites More sharing options...
Nick Jones Posted December 7, 2013 Share Posted December 7, 2013 the extra +20 won't gain you anything much and will be the limit for the block......Not sure if the standard head gasket will have big enough holes either.Nick Quote Link to comment Share on other sites More sharing options...
Richard_M Posted December 7, 2013 Author Share Posted December 7, 2013 Mmmm - 'no replacement for cubes'…Head gasket fire ring size is a good point though - will check that.The ready availability of a set of SP +20s may be a factor too - appeals to my tightness. :)R Quote Link to comment Share on other sites More sharing options...
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