Re: [VintageLambo] Re: 400GT ignition problem found

aaron arnold wrote: >PS: Also, the "mallory" distributors are most likely not >meant for 8krpm motors like ours.I"m guessing we have >dual-points to prevent point-bounce at high rpm. > My understanding has been that it is more of a function to extend the dwell on the engines which have more cylinders, thus more lobes on the distributor cams. One set of points opens, and before it closes, another in series opens, a few degrees downstream, extending the time the circuit is open. Bounce can usually be addressed with the cam profile, but with a six lobe cam, the time between lobes and flats is less than the desired dwell. Used on some high performance V8s, but of most value on V12s. I"d suspect the 400Gt has a different scheme with three lobes than the six lobe Espadas and Countachs I am familiar with. Cheers, Bob