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Topic: Replace Spark Plug Wires

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Replace Spark Plug Wires (1/19)
 12/10/07 12:16am
Aaron1976
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Vancouver, WA - USA

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1976 Corvette Stingray L-48 Automatic Black


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I purchased some Taylor 8mm Spiro Pro Series High Performance Ignition Wires for my 1976 L-48. Well I may sound kinda lame but how do you remove the top part of the distributer cap in order to replace the wires? I do know to replace and match the wires one at a time. Help? Wits%20End

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Replace Spark Plug Wires (2/19)
 12/10/07 5:20am
Sarge81Lifetime Member
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WEST SENECA, NY - USA

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1981 Blue Ice Met. w/pearl ghost flames TKO500 5speed. LS1 Swap 3.45 Dana 44.


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Are you talking about the plastic piece that keeps the wires from coming off?
 If so, then if you look carefully at the top of the distributor. There are two thin latches that pop outward with a flick of your fingernail releasing the wire hold down. I think it may even say "latch" on the top.


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Replace Spark Plug Wires (3/19)
 12/10/07 5:59am
Adams' AppleLifetime Member
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Duncanville, TX - USA

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#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


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Yep...the plug wire retaining ring just "snaps" onto the top of the dist. cap. Push outward on the two latches, and it will come up. The wires will also be inserted into the ring, so you'll have to twist/pull them out.


btw...if you look closely at the ring, you'll see that it is numbered at each plug wire hole, so you'll know which wire goes where...as long as the distributer is still in the correct location.Adams' Apple2007-12-20 06:04:31

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Replace Spark Plug Wires (4/19)
 12/19/07 11:24pm
79rebuild
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Yelm, WA - USA

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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.


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Aaron don't feel bad! My new HEI distributor didn't have the ring so I had to figure it out. I got a set of the Taylor wires yesterday and I'm not really enjoying making my own wires too much.Pinch
 
Does anyone have a decent picture of what the plug wires (done up right)  at the distributor should look like?
79rebuild2007-12-19 23:26:44
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Replace Spark Plug Wires (5/19)
 12/20/07 8:48am
steves74Lifetime Member
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Klamath Falls, OR - USA

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74 coupe 4 speed 350, 54K actual miles, all original; paint, interior, engine, split bumper. #'s match. 2nd owner, no stress cracks.


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79rebuild, the pictures look real good.  Looks like your going first class.  Do you still have your website covering the restoration?  If so what is it? Thanks

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74 coupe 4 speed 350, 54K actual miles,
all original; paint, interior, engine,
split  bumper. #'s match. 2nd owner, no stress cracks.
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Replace Spark Plug Wires (6/19)
 12/20/07 10:21am
dwright
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Victor, NY - USA

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It's looking good Aaron. Nice job.

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Replace Spark Plug Wires (7/19)
 12/20/07 9:11pm
suncountryLifetime Member
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Moses Lake, WA - USA

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1976 L48 4-spd, Mahogany Metalic exterior, Buckskin interior 350ci/350hp, 3rd owner, fiberglass spring, 255/50-16's Torq-Thrust II


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Replace Spark Plug Wires (8/19)
 12/21/07 1:13pm
Aaron1976
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Vancouver, WA - USA

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1976 Corvette Stingray L-48 Automatic Black


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Glen, Very nice!ClapWow shiny, I like shiny things that go fast. Nice wire set up you have there.Thumbs%20Up



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Replace Spark Plug Wires (9/19)
 12/21/07 3:27pm
79rebuild
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Yelm, WA - USA

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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.


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Yeah Glen that looks real nice! I see your AC is on already LOL  Aw I really miss living on the other side of the mountains.
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Replace Spark Plug Wires (10/19)
 2/10/08 7:30pm
Aaron1976
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OK, after driving my Vette through the hood on Saturday it started to run a little ruff while at an idle. So I got out the new plug wires and put them on and cleaned the carb up with some carb cleaner spray. She runs real good now. The retainer ring on top of the distributor cap came off real easy but it is in bad shape and cracked, I did not put it back on, do you have to have it on? One of the old wires I took off had rust on the conection at the distributor cap and the overall wires looked to be real old, probably why it ran ruff. I cleaned all the contacts on the distributor cap before putting new wires on. Next I am planning on getting a new MSD red Distributer cap with built-in Coil and Rotor I found for about $30.00 at Schuck's. The end result is I have a nice bunch of red wires (kinda old school look) in the engine compartment and she runs good.Big%20smile
 
 
 
 
 
Aaron19762008-02-15 12:51:11

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Replace Spark Plug Wires (11/19)
 2/11/08 4:23am
RedwingvetteLifetime Member
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Waterford, MI - USA

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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.


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Replace Spark Plug Wires (12/19)
 2/11/08 10:25am
dwright
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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 (13/19)
 2/11/08 11:16am
VetteSpecialties
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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 (14/19)
 2/11/08 11:58am
79rebuild
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Yelm, WA - USA

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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.


Joined: 7/12/2007
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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 (15/19)
 2/11/08 9:42pm
suncountryLifetime Member
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Moses Lake, WA - USA

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[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 (16/19)
 2/11/08 9:55pm
Adams' AppleLifetime Member
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#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


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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 (17/19)
 2/13/08 1:05pm
suncountryLifetime Member
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Moses Lake, WA - USA

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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 (18/19)
 2/14/08 10:27am
VetteSpecialties
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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 (19/19)
 5/31/08 6:01pm
neuroclast
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[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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