Quote:
Originally Posted by dad911
Batteries do smooth the voltage. They are really a very large capacitor/filter.
Megasquirt in back (by engine) battery in front. You may be measuring noise and voltage drop in the cables.
Is the tuner you are working with used to 911 or is his data based on front engine cars, where the megasquirt is likely connected with a very short cable to the battery?
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Could be, though all the cables are new and I get a solid 13.5v when measured at the fuse block behind the seat where the megasquirt and MSD boxes are mounted. The tuner I am working with is Jeff (I dont know if its OK to use his full name) but he did some cleanup/fininshing on the megasquirt box for me and mentions some other 911s including one in GA this weekend also with a JB Racing 12 plug distributor like mine...thats pretty specific!