We've made some progress with tuning our Triumph Spitfire project. The car had been running a sticky and horribly restrictive single Stromberg carburetor, but we switched to a dual SU carb setup from a European Spitfire. After installing them, we knew immediately that the new carbs were better: Bot…
I have a '79 Spitfire that I put 4 Mikuni flatslide carbs from Performance Research Industries on to replace the single SU. The engine has been bored .30 over, fast road cam installed and now the throttle response is instantanious! I love to see articles about this often forgotten Triumph.
I'm running the same carb setup with two freer flowing filters, but need to really dial them in. I get much over 75 mph and the engine just loses all grunt.
1500 Spits won't go anywhere unless you get the compression up. It's a smog engine, and stock a 40HP beatle is faster. LOL.
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