system6 Posted June 23, 2014 Share Posted June 23, 2014 hi all.... My engine number ends in HE , does this stand for 'high compression engine',... and would it have flat or domed piston tops and whats the differance between then , ...PS still to busy to post photo's of resto work at present but will do very soon ....once again thanks Quote Link to comment Share on other sites More sharing options...
rotoflex Posted June 24, 2014 Share Posted June 24, 2014 I think the domed pistons were only used in the last Mk3's, not necessarily for high compression, but as part of the BL scheme to use common parts across the 6 cylinder engines. What is the number on your engine? Quote Link to comment Share on other sites More sharing options...
BrendanD Posted June 24, 2014 Share Posted June 24, 2014 The HE applies to all engines of UK spec.Domed pistons came in a KE20000 and above as Triumph started using the 2.5 head to standardise, the pistons needing to be domed to maintain the CR. Quote Link to comment Share on other sites More sharing options...
system6 Posted June 24, 2014 Author Share Posted June 24, 2014 Thanks for your replies chaps,........engine No KE 020225 HE.....P.S what does CR stand for :-/ Quote Link to comment Share on other sites More sharing options...
Nick Jones Posted June 24, 2014 Share Posted June 24, 2014 CR = compression ratioNick Quote Link to comment Share on other sites More sharing options...
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