Quote:
Originally Posted by kent olsen
Interesting debate, at times!!! I have a 3.0L 9.5:1 J&E pistons, twin plug engine with webers that Mike at J&B Racing helped me build. Ran it on their engine dyno. It has 2 MSD's. Running both plugs vs one was a 15hp gain (245HP). Being in aviation I too wanted to know if both MSD's where working. Simple I put a switch in the power line to one MSD. Switch it off and watch for the RPM drop just like the mag check on an airplane.
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The only thing that changes from one box to two is the current to each coil. One box splits the available current across two coils where two boxes supply maximum available current to each coil. When each coil runs at a higher current the resultant higher spark energy builds a better fire (read HP). So, once again, there is a correlation between spark energy (current to the coil) and horse power.
This is the third time someone has posted a similar claim substantiated by dyno runs. That's proof and NO JOKE.