LT1 Spark Plug Wire Questions
Thread Starter
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Joined: Nov 2011
Posts: 65
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From: Bucks County Pennsylvania
LT1 Spark Plug Wire Questions
I have bought a new belt, tensioner, plugs, wired and fuel filter as my winter tune up project.
So when the box came for the parts I ordered I found that the plug wires were in an original AC Delco box, part number 628D. The plug wires are red and say Corvette LT5 in white with extra long connectors for the plugs around the headers.
I also got rapidfire platinum AC Delco plugs...part number AC8.
Will this fit a 93 LT1?
The part distributor and the guy I called at customer service all say it will fit, but I think the plugs are for an LT1. I went to all my local stores and they all had to order the parts them from their warehouse so I just went home and bought it all online with free shipping and 2 day delivery!
Plus i dont want to get neck deep in the tune up and find out I need to stop b/c the plug wires are for an LT5
Any help would be appreciated.
Anyone know the OE stock part numbers for the plugs and wires in case I need to return and exchange them??
So when the box came for the parts I ordered I found that the plug wires were in an original AC Delco box, part number 628D. The plug wires are red and say Corvette LT5 in white with extra long connectors for the plugs around the headers.
I also got rapidfire platinum AC Delco plugs...part number AC8.
Will this fit a 93 LT1?
The part distributor and the guy I called at customer service all say it will fit, but I think the plugs are for an LT1. I went to all my local stores and they all had to order the parts them from their warehouse so I just went home and bought it all online with free shipping and 2 day delivery!
Plus i dont want to get neck deep in the tune up and find out I need to stop b/c the plug wires are for an LT5
Any help would be appreciated.
Anyone know the OE stock part numbers for the plugs and wires in case I need to return and exchange them??
Drifting
Joined: Aug 2006
Posts: 1,326
Likes: 18
From: Los Angeles California
LT5s used an Opti too, right? So the plug wires would be the same length. If they Ohm test about the same (if that even matters, considering how little the wires affect voltage), they'll be functionally identical.
Drifting
Joined: Aug 2006
Posts: 1,326
Likes: 18
From: Los Angeles California
Oh wow you're right, the wires are routed totally differently than on my LT4; overtop of the engine. Didn't know they moved the spark plugs around like that. Nevermind, these wires would probably be an awkward fit depending on their lengths and the lengths of those boots.
Race Director
Joined: Oct 2005
Posts: 11,770
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From: Rolla Missouri
2021 C4 of the Year - Unmodified Finalist
St. Jude Donor '10 thru '25
The LT5 used a distributorless ignition with 4 coils (2 plugs per coil) and a crankshaft sensor.
Last edited by RollaMo-LT4; Jan 17, 2012 at 09:42 AM.
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From: woodbury new jersey
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Joined: Nov 2011
Posts: 65
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From: Bucks County Pennsylvania
thanks for the replies guys...I got the wires from autopartswarehouse.com
The wires were about $80 so i doubt they are the $250-400 OEM wires for a ZR1, but they do have Corvette LT5 and the plug # on the wires. I wish I could post a pic.
The wires also came in a AC Delco box from the early 90's as it was nice and weathered.
I might snoop aroun the ZR1 forum and do some research.
The wires were about $80 so i doubt they are the $250-400 OEM wires for a ZR1, but they do have Corvette LT5 and the plug # on the wires. I wish I could post a pic.
The wires also came in a AC Delco box from the early 90's as it was nice and weathered.
I might snoop aroun the ZR1 forum and do some research.
Army Hoist Operator
Joined: Feb 2009
Posts: 836
Likes: 17
From: OK
ZR1 sparkplug wires
ACDelco catalog shows 628D wires are for ZR1. Autopartswarehouse has them listed as being for LT1 and lists none for ZR1. $75 shipped is probably a good deal if they're so rare.
