Spark plugs
06-26-2007, 10:35 PM
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Spark plugs So the gaskets finally came in, and we began to proceed with taking off the Y pipe, and since i really didn't want to spend the time ordering NGR TK55s off the internet, and since this is really the only time i could do it, i went to the auto parts place and got some ACDelco 41-985 iridium sparks, quite costly as well, gapped at .040... When i pulled the 5 spark plugs (all i had time for tonight) i found that the previous owner had already been running NGR TK55s, which i have yet to find out the gapping on them.. So my question is, are these good plugs? or should i take them out, and eat the wait for NGR TK55s... and also what is the prime gapping i should use on these ACDelcos? Thanks for all the help
06-27-2007, 12:22 AM
#4
the ac delcos are great plugs....i have mine for 30k miles and three engine break ins....i took them out when i put in my headers and they looked brand new....keep them...they can be run for a long long time....the copper ngks arent worth the money if you run the car hard...the copper doesnt stand up at all to the iridium
06-27-2007, 11:44 AM
#5
I can't seem to find those plugs local either. I order them from sparkplugs.com, w/shipping they were about $24. Same price or cheaper than if I had to drive outside of my local area and get them.
And they are TR55 (not TK), stock # 3951. My bolt-on babycam car I gapped them between .050 and .055 (can't remember exactly, probably went .050 to be safe). I just switched to TR6 to give them a try, gapped at .045.
And they are TR55 (not TK), stock # 3951. My bolt-on babycam car I gapped them between .050 and .055 (can't remember exactly, probably went .050 to be safe). I just switched to TR6 to give them a try, gapped at .045.
06-27-2007, 06:46 PM
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I just took my OEM AC Delcos out for the first time with about 70K on the clock, and they still looked good. I replaced them with AC Delco Iridiums and put on MSD wires. The new Iridiums were pre-gapped. Don't forget to use antiseize on the threads.
08-12-2007, 01:29 AM
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Originally Posted by BigDaddyBry
I can't seem to find those plugs local either. I order them from sparkplugs.com, w/shipping they were about $24. Same price or cheaper than if I had to drive outside of my local area and get them.
And they are TR55 (not TK), stock # 3951. My bolt-on babycam car I gapped them between .050 and .055 (can't remember exactly, probably went .050 to be safe). I just switched to TR6 to give them a try, gapped at .045.
And they are TR55 (not TK), stock # 3951. My bolt-on babycam car I gapped them between .050 and .055 (can't remember exactly, probably went .050 to be safe). I just switched to TR6 to give them a try, gapped at .045.
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08-12-2007, 02:34 AM
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I work at advanced and I know we stock them, if you have the part number TR55, they can cross that to the stock number and get them for you. Think there like 1.88 each which isnt bad at all
08-18-2007, 09:40 PM
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The AC Delco Iridiums are very good plugs, but not worth the cost IMO. I run TR55's as well but have no problem picking them up locally. I would have no problem at all running the AC's in my car. I just wouldn't pay that much for a set of plugs. I always keep a spare set of TR55's on hand and change them every 15,000 miles or so. They cost me about $15 a set. Last I checked the iridiums are like $7-$8 a piece.
