For a while now my BN1 - based car has been spitting back through the rear
carb. This happens for rather longer than you would expect on a cold engine -
it usually only needs choke to start, & seems to run OK at all speeds, but
there is the occasional spit-back, through the rear carb only, until the motor
is really up to temperature. This seems to be mostly on a light throttle. The
carbs are pretty well set up I think (H6s) using carb balancer & lift pins.
The plugs look OK and are consistent across the cylinders. The carb spindles
are getting a bit worn but the front is worse than the rear in this respect.
Timing is set with a strobe but I'm not 100% certain of the total advance.
Any ideas?
Peter Linn
Brisbane Oz
BN1 Ward Special coupe
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