The pros and cons

Installing bike carburettors has proved to be a major improvement for the car, for the following reasons:

There are some disadvantages, however:

The final verdict

I started this conversion as a winter project, aiming to get the car ready in early Spring. In the end it was mid-June before I finally got the car near-enough right and, with British summers as they are, I wasted a lot of driving time. Despite all that, I am glad I did the change - the old Weber DGV carb was complicated, getting old, and was difficult to keep in a reliable state of tune. The new carbs are much more effective, possibly 20 years younger, and in almost every respect far superior.

The only thing I'd say to anyone contemplating a similar conversion is "don't under-estimate the time it will take, or the difficulty you may have in getting parts." However, if you can build a car you can get over most problems, and hopefully can find solutions to the rest.

Late update

Well, after a few years of running the bike carbs, I decided that (a) the intake roar was too annoying, and (b) getting the bike carbs professionally tuned was hard to arrange (not many rolling roads will do them) and too expensive (2 or 3 hours at £100/hour). So in the end I reverted to a new Weber DGV 32/36, which is now working very well.

[Tuning the carbs] [Bike carb menu]