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Replace Spark Plug Wires

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Replace Spark Plug Wires

Posted: 2/11/08 4:23amMessage 11 of 19
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Waterford, MI - USA
Joined: 9/13/2002
Posts: 1795
Vette(s): 1973 Red coupe
Very nice. I like new stuff. It use to be that all th contacts in the distributor cap were copper but not anymore. A good cap, rotor, and wires make everything better.

Brian - NCM Lifetime Member

73 coupe L48, Flat-top pistons, Performer RPM Heads, Crane Cam and roller rockers, Holley 650 vac sec. Performer intake,
3.55 gear BTO 200-4R trans,
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Replace Spark Plug Wires

Posted: 2/11/08 10:25amMessage 12 of 19
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Victor, NY - USA
Joined: 7/12/2004
Posts: 6842
Vette(s): 2004 Commemorative Edition Coupe, Auto w/HUD. 13K miles in 2015. Sold 1982 Red Coupe
Question on running the spark plug wires:
 
If they are run parallel for a relatively long distance like suncountry's, is there a risk of the voltage jumping to the adjacent wire and firing the wrong cylinder?
 
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Replace Spark Plug Wires

Posted: 2/11/08 11:16amMessage 13 of 19
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Mounds View, MN - USA
Joined: 5/24/2007
Posts: 1034
Vette(s): 70 LT1 coupe, 69 350 HP coupe, 69 390HP 427 coupe, 71 LS5 convert, 85 coupe, 93 coupe
That's the way the factory did it with no problem.  If you have a higher voltage ignition system, there is a greater chance of that inductive firing, but not with a factory system.
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Replace Spark Plug Wires

Posted: 2/11/08 11:58amMessage 14 of 19
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Yelm, WA - USA
Joined: 7/12/2007
Posts: 356
Vette(s): 1979 L82 4 speed Scat 383 crank 190 cc Procomp Aluminum Heads 202 160 stainless valves GM Powder metal rods Speedpro H860CP Hypereutectic pistons 280 cam hydralic HEI Pro comp 1.6 roller rockers Mighty Demon 750 Sanderson CC1AP Hedders.
I was wondering about the same thing I've seen a lot of pictures of the wires being wrapped or twisted around one another and I thought that was a no no. I was always under the impression you couldn't randomly cross the plug wires or you would get crosstalk from the other wires going on.
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Replace Spark Plug Wires

Posted: 2/11/08 9:42pmMessage 15 of 19
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Moses Lake, WA - USA
Joined: 4/16/2005
Posts: 2134
Vette(s): 1976 L48 4-spd, Mahogany Metalic exterior, Buckskin interior 350ci/350hp, 3rd owner, fiberglass spring, 255/50-16's Torq-Thrust II
[QUOTE=dwright]Question on running the spark plug wires:
 
If they are run parallel for a relatively long distance like suncountry's, is there a risk of the voltage jumping to the adjacent wire and firing the wrong cylinder?
[/QUOTE]
Dave
I will let you know if I have a cross firing issues once I am up and running. Didn't think it would be an issue as the factory ran all 4 plug wires right next to one another down under the block. But you never knowWink
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Replace Spark Plug Wires

Posted: 2/11/08 9:55pmMessage 16 of 19
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Duncanville, TX - USA
Joined: 11/8/2003
Posts: 22720
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas
The only wires you really need to watch for are #s 5 & 7...you don't want them running next to each other anywhere in the run. These two plugs fire one right after the other, and are the cylinders that are next to each other. If these two wires run close enough, they will cross-fire. You should always separate these two wires with another wire in between them. If you look closely at any factory plug routing(on mouse engines), you'll see they were run like that...always with another wire in between them. It don't always look good, cosmetically, but the benefits outweigh the cosmetics.

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Replace Spark Plug Wires

Posted: 2/13/08 1:05pmMessage 17 of 19
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Moses Lake, WA - USA
Joined: 4/16/2005
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Vette(s): 1976 L48 4-spd, Mahogany Metalic exterior, Buckskin interior 350ci/350hp, 3rd owner, fiberglass spring, 255/50-16's Torq-Thrust II
Thanks for the tip JoelThumbs%20Up, I moved the #5 plug wire in the clamp by the dist which leaves only a couple of inches where #5 & #7 run parallel. If I was to get an induced spark, does it show up under load or at idle?
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Replace Spark Plug Wires

Posted: 2/14/08 10:27amMessage 18 of 19
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Mounds View, MN - USA
Joined: 5/24/2007
Posts: 1034
Vette(s): 70 LT1 coupe, 69 350 HP coupe, 69 390HP 427 coupe, 71 LS5 convert, 85 coupe, 93 coupe
The induced voltage has to jump the spark plug gap, and that is easiest under the least load, so you would most likely see it at idle or during higher RPM deceleration.
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Replace Spark Plug Wires

Posted: 5/31/08 6:01pmMessage 19 of 19
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Charleston AFB, SC - USA
Joined: 10/31/2007
Posts: 111
Vette(s): 1979 Cream Beige Coupe w/383 & 700R4
[QUOTE=suncountry]Here is what I am doing
 

[/QUOTE]

 

That looks awesome! I dont like the look of my wires running all over the hood, mind telling me what setup you have for the brackets and what wires you got to run them like that?

Thanks!

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