Hi has any one got any experience of fitting a different carb to a B/ham Scott,as there is very little room between the top of the carb and the petrol tank also between carb and the oil tank. thanks Eric
Hi Eric, I am sure I replied to this question a number of years ago , in the 1970s I ran my Birmingham Scott on a 389 monobloc, you will have to make a wedge shaped manifold, start off with block of aluminium approx 1 1/4″ thick drill and counterbore for 3X 1/4″ whit allen screws to attach to the crankcase, then machine the carburettor face at an angle so the carb sits at a more horizontal position and drill and tap for fixing studs at 90 degrees from this face, you will have to blend the centre through hole to align carburettor and crankcase, my carb was 1 3/16″ and needed quite big jets to compensate for the slower air speed through the carb, hope this helps, by the way George Silk used to sell Concentric carbs and manifolds as an upgrade for Scotts. Alan Noakes. firstname.lastname@example.org
There were some proper adaptors available at one time which allowed a monoblock to be fitted to a Scott engine – but you’ve probably got less chance of finding one as getting a straight answer from a politician.
Hi Eric. Sorry for the late response. I have got a Mk.1 Amal Concentric on my 1960 Brum. I had to make a manifold for it as although it will bolt on directly in place of the old remote float job, it would be at too steep an angle to work perfectly. Runs and starts ok, although I can’t compare it directly as I never had it running with the old carb.Doesn’t Eddie make a manifold to suit? My manifold works ok but it wouldn’t win any beauty competitions ! I have a very short bellmouth on it. There is no room for a filter.