A TR newbie - rough running.

Hello all, In the words of Austin Powers, allow myself to introduce, myself: Smooth, handsome and wealthy, with a penchant for exotic cars. Well, that’s quite enough about 007. As for me, I’m a highly mechanically competent privateer with an unhealthy obsession for carbs and extracting every last pony out of vintage cars.* In short, a middle aged man in suburbia, living the dream! I’m currently helping my BIL with the challenges bestowed upon him by his gorgeous TR6

Thanks Peter, appreciate the clarification. That’s kind of what was baking my noodle - I was also expecting a weaker mix, but now with your latest explanation it makes a lot of sense as to what is happening. To support your logic: I always wondered why putting on the factory air-box would bring about the same richening effect. I had put it down to a restrictive box or my K&N filter being a little clogged. But then the factory box has built-in 40mm tall trumpets on its back-plate which,