andymcp

If better brakes are installed at the rear, would the front also have to be upgraded to maintain the front to rear bias?

If you want top performance, get a 4 branch manifold and a vitesse system. [/quote] Mine's been on back order with Canleys for 4 months.  I think they are having supplier 'issues'!

Hi Dave, I'm gradually working my way through the same process with a 13/60 convertible.  See below my modifications and observations: Alternator - seemed like a good idea for regular use (and the dynamo expired on the M6 on the journey home from collecting the car). Electronic ignition - fitted by PO. Fit and forget? Relays in lighting circuit - improved illumination and reduced load on light switch.  I suppose it depends on whether your car will get out much after dark! Lowered/uprated front springs - dropped the ride height a lot!  I subsequently fitted some spacer discs to raise it slightly. Spitfire swing spring and ARB - improves handling.  I fitted 2nd hand items and as Cliff pointed out they are soft (my car drags it's a**e like a dog with worms).  Passengers do become an issue.  I'm still contemplating where to go with this.  The mk3 GT6 apparently got an uprated swing spring but nobody supplies these now.  I was thinking of getting a bespoke spring manufactured but that would depend on price. GT6/Vitesse front uprights and type 16 brake calipers - fitted by a PO.  They work and I've got nothing to compare them with. K&N air filter - got it cheap (and a bit of bling under the bonnet).  Probably little to no difference without additional engine mods. Revotec electric cooling fan - bought in Rimmer Bros spring sale.  Still expensive but seems to work ok.  Ditching the mechanical fan can liberate a couple of bhp. My exhaust is corroded and needs replacing but I don't like the twin outlet 'performance' systems.  Canleys do a modified Vitesse single box system for Heralds which I'm tempted by.  Spitfire mk4 cylinder heads have slightly higher CR and bigger inlet valves and mk3 spitfire cam is supposed to be the best.  Then you're into gearbox conversions, etc, etc and you could (should?) have bought a Vitesse! Any suspension mods would benefit from a pukka 4 wheel alignment (tracking front/rear minimum).  I've never bothered and get by using planks of wood and lengths of string. Try driving the car before deciding to make it go faster.  You might realise you don't want it to.  I find my car copes ok with traffic on A roads, but dual carriageways/motorways are a chore. Prepare to make lots of new friends.  Best of luck, Andy.

Not as standard, but the photos show one fitted to that car!

How does the brake servo work?  They could have saved a bit of weight by removing that.  Then again, with the weight of all those batteries...