slapathy Posted September 8, 2014 Share Posted September 8, 2014 Anyone ever driven a Herald fitted with a 3.89:1 diff (Vitesse/GT6/ MkIV Spit) yet with the standard (60 HP) engine? If so how sluggish was it? I am thinking of doing this to my 13/60 Estate. It currently has a 1300 Dolomite engine, which is wrecked. Alternatively, if anyone has a 1300 Dolomite engine in reasonable order it would make my life much easier. To put a 13/60 engine back in I will need to swap gearbox, exhaust and prop flange. Not a huge deal, but simply swapping the engine would be slightly less work. Quote Link to comment Share on other sites More sharing options...
Richard B Posted September 8, 2014 Share Posted September 8, 2014 There is a friction plate option (Canleys used to sell them) to put an earlier flywheel (1147, 13/60, Spitfire 1300) onto a fine spline Dolomite/1500 Spitfire gearbox. Alternatively you can fit the Dolomite flywheel to a smaller engine, might need some dowels to make the bolt holes smaller. Its a Triumph, so lots of mix and match possibilities.or look for a 1500 engine, you will definitely need a taller diff then. Quote Link to comment Share on other sites More sharing options...
Steve P Posted September 8, 2014 Share Posted September 8, 2014 I have a 3:63 in my Herald,albeit with a single rail o/d box.Standard large crank 1300(dont ask).It pulls fine and drives lovely.Steve Quote Link to comment Share on other sites More sharing options...
Dogsbody47uk Posted September 8, 2014 Share Posted September 8, 2014 The original 4.11 diff ratio was ok for the 1147cc engine. The 13/60 engine has a lot more bhp and torque, relatively speaking. My 13/60 feels undergeared on its 4.11 and I intend to switch it for a 3.89 in the near future. Hopefully it will feel and sound less frantic. Cheers, Dave. Quote Link to comment Share on other sites More sharing options...
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