Iridium plug update
All Star
Joined: Jun 2008
Posts: 813
Likes: 2
From: St. Louis
I replaced the 3923's with NGK Iridum XI plugs. They seem to be a huge improvement. The Autolites plugs seemed better at first, but they quickly began to suck. The engine idled a bit smoother, but torque was decreased. I've had the NGKs for about 500 miles now, and the snap is back.
Record Breaker
Joined: Dec 2006
Posts: 1,048
Likes: 21
From: Mobile, AL
descent deal on the bosch's here. went ahead and got some, hope it's legit.
http://cgi.ebay.com/ebaymotors/_Car-...1%7C240%3A1318
http://cgi.ebay.com/ebaymotors/_Car-...1%7C240%3A1318
Record Breaker
Joined: Mar 2006
Posts: 1,513
Likes: 2
I don't know how this discussion is still going on.
I am still on the ddl plat 5224 autolites and there exactly the same as day one. Im sure the iridiums are just the same. Annnd the coppers.
Sure you guys aren't putting them in backwards?
I am still on the ddl plat 5224 autolites and there exactly the same as day one. Im sure the iridiums are just the same. Annnd the coppers.
Sure you guys aren't putting them in backwards?
All Star
Joined: Feb 2008
Posts: 851
Likes: 0
From: San Diego, CA
I replaced the 3923's with NGK Iridum XI plugs. They seem to be a huge improvement. The Autolites plugs seemed better at first, but they quickly began to suck. The engine idled a bit smoother, but torque was decreased. I've had the NGKs for about 500 miles now, and the snap is back.
All Star
Joined: Feb 2008
Posts: 851
Likes: 0
From: San Diego, CA
Well, I switched out the 3923's this past weekend. I went with the Bosch Fusion Iridium 4508's. The truck had over 200 miles put on it on Sunday after they were installed and a 220 mile round trip jaunt to L.A. yesterday for a business meeting. I have to say they are night and day over the 3923's. My truck has it's ***** back (with the chrome danglers like Bolt mind you). The truck idles as smooth as the 3923s and it moves. I am very happy with them!
Champion
Joined: Aug 2006
Posts: 3,051
Likes: 6
From: Roanoke, Texas
4.7s seem to like the none copper plugs a tad better then the copper ones, i know on the 3.9, 5.2, and 5.9 platium plugs are HORRIBLE!
If you get a set of autolite and gap them Correctly, you can save yourself 50$ and get the same performance.
I have used NGKs, Autolites, Bosh Platiums, and the iridiums by autolite.. and as far as i can tell, i get less backfires and smoother start/idle with the Copper Autolites, but then again i have 5.9 a out of date motor.
If you get a set of autolite and gap them Correctly, you can save yourself 50$ and get the same performance.
I have used NGKs, Autolites, Bosh Platiums, and the iridiums by autolite.. and as far as i can tell, i get less backfires and smoother start/idle with the Copper Autolites, but then again i have 5.9 a out of date motor.
Well, I switched out the 3923's this past weekend. I went with the Bosch Fusion Iridium 4508's. The truck had over 200 miles put on it on Sunday after they were installed and a 220 mile round trip jaunt to L.A. yesterday for a business meeting. I have to say they are night and day over the 3923's. My truck has it's ***** back (with the chrome danglers like Bolt mind you). The truck idles as smooth as the 3923s and it moves. I am very happy with them!
haha If ya dont mind me asking what are the 4508s running for price?