It's time consuming, like real time consuming, in my experience in my 122 with a biggish cam and modified head and such, the car runs. Good. But the afrs are never happy, the guides on jets for them are fine to start but differ engine to engine and I think the ignition system being fixed is part of my problem.
It's brilliant under full throttle. But it definitely is not great for cruising without a lot of work. I do have an idea on where I need to go on my car to get better cruising afrs, but I haven't had time to do that so instead just deal with it running on the richer side. I really should pay someone with a dyno to tune it up, but I think my ignition system being fixed and not a 123 or programmable is partially my let down.
https://store.jenvey.co.uk/throttle-bodies-and-components/throttle-bodies/heritage-dcoe/heritage-twin-tbody-40-48mm-pair-tdp40-48
These are the units I was looking at. Yes it will cost more up front. But considering you could go for a microsquirt with harness(700 iirc) , you can program the ignition and fuel and it will have a cruise map, unlike a weber that puts the same amount of fuel at one throttle position based on the idle and main circuits (put simply) the crossover on them is what gets you, people accept to need different jets to cruise long distances vs doing a power run. None of that is needed with the jenvey unit.
Of course, you don't gain power just by doing this one part, the head won't make sense without bigger valves and porting and a bigger cam.
