Just got off the dyno yesterday using the crank trigger setup shown in post #35 of this thread. The engine uses a Holley dual sync for the cam sensor. As we had problems with the dual sync crank signal on previous dyno runs, we switched to an external crank trigger using 4 magnets and a Hall effect sensor. The good news is that the new external crank trigger worked perfectly and solved all the problems we were having regarding crank signal.
However, the procedure to setup the dual sync part of the system (using the external crank trigger) is more complicated then you might expect. Here is a good video on how to do it properly, and this is the process we used with success on the dyno:
https://www.youtube.com/watch?v=inQw...rmanceIgnition
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1964 Catalina 2+2 4sp, 421 Tri-power
1965 GTO, Roadster Shop chassis, 461, Old Faithful cam, KRE heads 305 CFM,
Holley EFI, DIS ignition.
1969 GTO 467, Edelbrock 325 CFM, Terminator EFI
1969 Firebird Convertible
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