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Old 09-11-2003, 19:36   #1 (permalink)
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Multi spark?

Has any one tried a msd or somthing simular? Do they make much difference?
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Old 09-11-2003, 23:59   #2 (permalink)
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Re: Multi spark?

I put an MSD6TN (effectively the same as 6A and 6AL) in my EB,
It makes a bit of difference in the bottom end, slightly more responsive, and uses slightly less fuel.
Top end difference will most likely be unnoticable on an N/A car, but with the blower it allows to run std plug gaps without blowing out the spark.

MSD's give a couple of sparks at idle (i think its around 3-4), at 1800 rpm it drops to 2 and at around 2500-3000 it reverts back to a single spark.

One downside is you get a bit of noise induced into the stereo system, and there is not a great deal I can do about that in my case (the msd harness intersects my cables from the H/U to teh amp so it is expected - i couldnt fit the msd under the bonnet)
I suppose this would depend where you mount the unit.

Overall, it is a good upgrade, but the factory ignition is good enough until you go turbo or supercharged.
On an N/A car, you probably wouldnt be happy with the results you gain, for the money it will cost.

One hint: if you want to do it, buy one from the US and get it brought over, much cheaper than sourcing one locally. Even cheaper if you go 2nd hand (mines an ex nascar one that only ran one race)
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Old 09-12-2003, 03:29   #3 (permalink)
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Re: Multi spark?

Cool chears! I have also been told about the Crane multispark units, any good???
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Old 09-12-2003, 03:53   #4 (permalink)
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Re: Multi spark?

Crane is a different design, and uses digital circuitry,
Apparently the Crane puts out slightly more power, but as far as operation goes, they are both basically the same
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Old 09-13-2003, 05:23   #5 (permalink)
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Re: Multi spark?

Its just that I put in this cam and when I put my hand over the induction pipe at about 2000revs, it sucks my hand down the pipe! Just thinking it might blow out the spark???
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Old 09-13-2003, 17:35   #6 (permalink)
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Re: Multi spark?

You will know if your losing spark, it will pull back or surge when under load at high rpm, or if on a dyno, the power delivery may drop off early, or not be smooth at the top end.
I probably wouldnt worry about it too much, the I6's have a decent ignition as it is.

If its an EF or AU with coil packs, it will also be a lot different to set up multispark, and more expensive.
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