C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

spark plug wire size

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Old Mar 6, 2002 | 12:59 AM
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Default spark plug wire size

On a 1989 L98 which is a better wire size 8mm 0r 8.5mm? I am getting MSD wires, Delco plugsand a hypertech coil kit. Thanks
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Old Mar 6, 2002 | 01:03 AM
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Default Re: spark plug wire size (Tim89)

the hypercoil isnt really any better than the stock setup, but id go with 8.5mm
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Old Mar 6, 2002 | 03:49 AM
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Default Re: spark plug wire size (Tim89)

The HyperTech coil puts out 53kV and does it at a higher RPM than the stock unit.

The 8.5mm MSD SuperConductor wires are great, only 50 Ohm/ft.
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Old Mar 6, 2002 | 07:03 AM
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Default Re: spark plug wire size (Tim89)

Ive tried both sizes of wires and seen no advantages with an 8.5MM.

In fact the 8.5 MM was a pain to stay on the distributor cap.I had to take a razor blade and skin the sides of the boots thinner.
It was too fat at the boots and with a hypertech coil or performance coil pack on top,it will be even harder to fit the wires on there.
(May vary on brands,I used Magnecores for 8.5)
8.5 also wont fit wire connectors and youll need to get larger ones.A few times the boots popped off the dist. cap from being too fat there.
Id stay with 8mm, and thats what Im using now and it fits great and no problems.
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