LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Multi spark Ignitions

Old Aug 26, 2005 | 01:10 PM
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Default Multi spark Ignitions

I have a question. I have a 96 LT1 Vette, and I contacted Mallory about their Hyfire 6 Ignitions, and which harness adapter I needed. The Tech at Mallory told me that I shouldn't install the Hyfire, because the computer will detect the greater spark, and retard the timing as well as adjust the AFR, ultimately knocking down my MPG, and I will not see any performance gain. I have installed Ingitions in previous cars and have always been happy, but this is the 1st time I've ever heard of one hurting performance. Does this soung right?

Greg
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Old Aug 28, 2005 | 03:41 PM
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not really. unless there is abnormal combustion, which a multiple spark ignition won't cause(in itself), the computer doesn't care what happens after it commands the coil OFF as long as all 8 cylinders are doing the same thing and not flagging a misfire.
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Old Aug 29, 2005 | 04:47 PM
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The only thing I've heard of the multisparks hurting is the Opti. It'll burn the cap/rotor up sooner since there will be high voltage flowing more frequently.

The adapter you need is the MSD 8877, that's the one I got for my Hyfire 6. It will work, but the wire colors are different. If you look at the drawings, you can figure it out.
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Old Aug 29, 2005 | 05:44 PM
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Are there any gains from a multispark setup?
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