I have certainly not carried out a before and after rolling road test with my MSD but I have fitted four systems now, each time there has been a very noticable change to the engine. They start quicker, have a more stable idle and the power at high RPM seems to be much better. I spent a long time setting up my Lucas dizzy with the timing figures that I wanted, the engine ran OK but when I fitted my MSD with the same timing figures the power above 5k RPM was much greater. I guess the Lucas system was starting to stuggle at this high RPM and for a standard road car they could get away with a system that was marginal at high RPM.DaveEFI wrote:I'm intrigued by the claims for this sort of ignition system. Has anyone ever done a comparison on a rolling road? I'm talking about the type of spark, rather than timing, of course.
The downside of an MSD system is that they are not cheap and you need decent HT leads otherwise they will burn away internally.