Any negative impacts to having lengthy coil wire?

57 Handyman

Greasemonkey
Feb 6, 2017
243
63
I finally decided to relocate the ignition coil on my 87 El Camino away from the top of the intake manifold and close to the distributor to the passenger side inner fender well. With the Pertonix CD box sitting inside the cabin where the ECM used to be, my preference is to combine and route all these wires in one bundle. I'm wondering if there are any negative impacts to having a lengthy, 42" coil wire. Any thoughts? Thank you in advance.
 

DRIVEN

Geezer
Apr 25, 2009
7,730
113
*CENSORED*
^What he said^
OEs used long coil wires. The 90s Dodge trucks with 5.2 & 5.9s had a coil wire about 4' long. Just be careful with your routing.
 
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CopperNick

Royal Smart Person
Supporting Member
Feb 20, 2018
2,068
113
Canada
Resistance in a wire is a function of the wire gauge and the distance that the voltage has to travel. Longer wire/higher resistance. If you can lay your hands on some bulk length spark plug wire in 8.5 or larger, maybe consider making your coil lead from that.



Nick
 
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57 Handyman

Greasemonkey
Thread starter
Feb 6, 2017
243
63
Thanks for your input guys! Here's what I ended up doing: I was able to find a vendor who sold a kit of coil/distributor boots and clips as well as a 4' length of wire to match my ignition's spark plug wires which are 8.5s. Haven't broken in engine yet so don't know if there is an issue.

Thanks again!
 
Oct 14, 2008
8,176
113
Melville,Saskatchewan
^What he said^
OEs used long coil wires. The 90s Dodge trucks with 5.2 & 5.9s had a coil wire about 4' long. Just be careful with your routing.
I own one of these abominations and the coil and it's long wire isn't one of the issues with these trucks.
 
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