• 1953 Velocette MAC

  • If you'd like to help with compatibility for your engine, please post a few pictures and any technical documentation or manuals you may have.
If you'd like to help with compatibility for your engine, please post a few pictures and any technical documentation or manuals you may have.
 #307  by Amish Warrior
 Thu Mar 21, 2019 10:55 am
I am interested in finding a way to do a Stand Alone conversion from Carby to EFI on Classic styled Motorcycles, given that Kits are made to fit Single cylinder Generators/etc that don't have all the "Bells'n'Whistles" of a Modern Motor.

I own a 1953 Velocette MAC. They are a very basic 350cc engine, Single cylinder, Magneto (ignition spark) powered, 15/16in (24mm) Flanged Carby, with a stand alone 6 Volt (lighting) power system.

I imagine that a Basic system could be built, given that:
*You could locate a simple spot on the Output shaft (or even the points system) to ascertain TDC of Piston travel.
*Most bikes are 6 Volt but a lot of enthusiasts have converted the Lighting systems to run on 12 Volts as well as changing from a Points setup to Electronic ignitions, so there is an easy reference point for TDC of each rotation.
*When the Bikes were first made (6 Volt), the Batteries required were quite large. Now days most use small SLA or Gel type Batteries that have 3-4 Times the Storage OR are 1/3rd of the size to do the Equivalent job as the Original, so it is possible to have a Small SLA battery connected to supply the EFI power...unfortunately that would be a Total Loss system unless a 12 Volt conversion is done.
*There is a lot of space to Accommodate fuel pumps/return lines/etc around the motor, Oxygen Sensor bungs can easily be attached to the Exhaust.

Any thoughts anyone or is it just a pipe dream?
 #315  by timhurdle
 Thu Mar 28, 2019 5:07 am
It all sounds feasible to me and the NanoEFI would surly be adaptable for that application. Its all a bit quiet from Travis at the moment but I hope things get moving a bit soon.

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