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I know nothing about Interceptors (so here I go- haha!), but I’ve been caught out by oversized valves with fairly hot cams causing bad low speed running on a Triton. I got some improvement by increasing the inlet valve clearances. Maybe that’s feasible on an Enfield: maybe not!Anyway, that would only be after conventional tuning of the carburettors: synchronising throttle stops and cables; idle jet cleanliness and size; throttle cutaway size; needle clip position; float level.Test for inlet manifold air leaks by spraying the joints with WD40 (or whatever) while the engine is idling.If it’s a Mk III or Mk IV Boyer, are you using two 12V ignition coils in series? That’s a bad idea.
I know nothing about Interceptors (so here I go- haha!), but I’ve been caught out by oversized valves with fairly hot cams causing bad low speed running on a Triton. I got some improvement by increasing the inlet valve clearances. Maybe that’s feasible on an Enfield: maybe not!
Anyway, that would only be after conventional tuning of the carburettors: synchronising throttle stops and cables; idle jet cleanliness and size; throttle cutaway size; needle clip position; float level.
Test for inlet manifold air leaks by spraying the joints with WD40 (or whatever) while the engine is idling.
If it’s a Mk III or Mk IV Boyer, are you using two 12V ignition coils in series? That’s a bad idea.
