i am fitting a solid state rectfier to my brum scott it has 3 wires from the alternator unlike the scott silk which has 2 i belive i have to join 2 of the wires together which colour wires do i join also i am fitting a amal concentric what main jet size should i use as i am a novice with scotts
If it’s a Lucas alternator or one with Lucas colours (green/white, green/black and green/yellow) link the green/ black wire to the green/yellow wire. These then connect to one AC input of the solid state rectifier and the remaining green /white wire connects to the other AC input.
I’ve recently done something like this to my Brum. However, the module that I used (an “A-Reg” from A O Services) also converts the system to 12v and acts as a regulator / rectifier. This changes the system to a two wire system rather like that of a dynamo and removes the need for the light swirch to switch in different alternator coils according to the load. Rather than attempting to describe the connections here if you PM me your address I can send you a copy of the data that came with my system. This not only describes the connections you requested but also specifies exactly which type of alternator is suitable for this conversion. I can also send you the information that Don Payne kindly gave me regarding the jetting and setting up of an Amal Concentric (32mm in my case).
May have been a little too enthusiastic to offer help.
By connecting the wires as I described you will be able to get full AC output from the alternator and therefore full DC output from the rectifier. This will need to be regulated in some way. If you are changing to 12 volt then a Lucas Zener diode would be the cheapest solution.
If you are retaining the 6 volt system simply connect the same coloured alternator wires to the new rectifier as are currently connected to the old one.
However, if you are fitting one of the many aftermarket rectifier regulator units, then I would expect full installation/wiring instructions to be delivered with the product.
I have a Boyer rectifier regulator unit on one of my BSA’s and it works brilliantly. Supplied with comprehensive wiring instructions .
Can’t help with the carb, my 29 flyer has brass Amal.