whats the deal wit MSD ignitions

[steve340demon]

just hooked up a msd in my 72 demon 340 and i seems like it don't wake up till 3000rpm,, some guys told me that it dont multi spark till 3000 rpm is this true if so i am ripping it back out????

 

[70aarcuda]

which msd unit did you install?

 

[CudaChick1968]

... and what chip is in it?

 

[70aarcuda]

from msd 6 instructions...

The MSD 6 Series produces full power multiple sparks for each firing of a plug. The number of multiple sparks that occur decreases as rpm increases, however the spark series always lasts for 20° of crankshaft rotation. Above 3,000 rpm there is simply not enough "time" to fire the spark plug more than once, so there is only one powerful spark.

 

[steve340demon]

its the 6al with the chip limiter and a 5600 chip in it... its no the dial one

 

[bohica2xo]

Did you set the timing after you installed it?

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[crackedback]

If you know where the initial timing was set prior to installing the MSD, see where it is now. If it moved a bunch and you haven't messed with the distributor, swap the wires from the pickup if an electronic unit.