Herald with 3.89 diff

[slapathy]

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.

[Richard B]

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.

[Steve P]

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

[Dogsbody47uk]

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.