Multi spark ignitions work very well in high performance engines. The
company MSD ignitions is one of the leaders. MSD stands for Multi Spark
Discharge. What happens is the cylinders get overfilled with fuel/air charge
and the single spark cannot ignite all of it fast enough while under extreme
pressure(11to1 compression and over) The multi spark ignitions spark first
and then a FEW degrees later it sparks again, just far enough down the power
stroke to make a bigger fire. This type of ignition would not benifit power
output on a stock engine enough to feel it. But on an emmisions vehicle, the
multispark does well with burning up all of the fuel and in turn reducing
emmisions.
In the end, the price of these systems is what makes them not suitable for a
stock Impcruiser.
Brian
> Rick. I think in this case, you may have exceeded the rpm limit for
> efficient point ignition operation, especially if you did not have the
dual
> point system that Chrysler was offering back then for drag racing (where
> engines were often abused and over-revved due to super low gear ratios).
I
> guess, this would be a case where the electronic ignition would help. In
> normal street applications where the speeds rarely hit 5000 rpm, the
> advantage would not be there (5000 rpm on third gear with a late 60's
> Imperial (2.94 gears) would be about 150mph! (For a stock 350 hp 440 w/
> dual exhaust, this speed would not be attainable).
>
> As for the multispark... well if your engine is not missing, an
additional
> spark later in the cycle will not do anything. In a real cold start when
> the engine tends to miss a lot, it might help.
>
> D^2
>
> At 06:15 PM 7/3/2002 -0500, you wrote:
> >hi,,remenber,this is a muti spark system and in our super stock a
> >automatics it made over a ouarter of a second difference at 140 plus mph
> >in the ouarter,,i call that an improvement,,,..we tested it several
> >times and found the same app. results each time...ps,most people dont
> >know that chry. ingtion is a hi energy muti spark setup.. rick
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