carburetion · FF-0586

Was the air-fuel mixture right on the first ARDUN pulls?

The operator was watching EGTs and says they were not killing anything. The question was whether it was rich enough: a little bit lean in the mid-range, but enough fuel going to the top side; it naturally leans out to 14, 15 and then rolls back as it starts rolling over the camshaft. The engine is called pretty happy and safe, not eating itself up. The figures are corrected: 289 on this pull and 292 on the other, in the neighborhood of 290.

Expert

Robert King

Evidence

expert attributed

Component

air-fuel mixture and EGTs

Applicable scope

Ford Flathead V8 with Don Ferguson reproduction ARDUN overhead valve heads, Steve Coppock's engine of about 289 cubic inches, single four barrel, on the dyno at Klein Engines