> Blueprinted? Term commonly used within the car racing community (at least in the UK) to = mean reaching a production car engine to closer tolerances than normally us= ed during production. Result is that all pistons tend to have a closer to n= ominal stroke than a standard production car would have, crank shaft would = be ground to have better balance, head and block machined to closer to nomi= nal dimensions, and anything else that may affect the engine performance be= ing machined to nominal blue print dimensions (e.g. polishing ports, valve = shaping). Probably not so common these days with NC machines producing much closer to= lerance mechanical parts than 40 years ago. >=20 > > > Motor bike and car engines were traditionally set just below the > > > taxation limit so that they could be rebored and remain within the > > > limit > > > > It also became the measure for racing categories, so with an extra 5cc > > (or > > whatever) available it could be blueprinted without exceeding the > > category engine size. > > > > > > > > -- > > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > > View/change your membership options at > > http://mailman.mit.edu/mailman/listinfo/piclist > > >=20 >=20 >=20 > -- > __________________________________________ > David C Brown > 43 Bings Road > Whaley Bridge > High Peak Phone: 01663 733236 > Derbyshire eMail: dcb.home@gmail.com > SK23 7ND web: www.bings-knowle.co.uk/dcb > >=20 >=20 >=20 > *Sent from my etch-a-sketch* > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .