Thanks!

[musclemerc]

I would like to thank Motorking for the FREE Autolite #XP104 Iridium plugs!
If there's anything I can do for you in the future Marauder related or not just send me a PM. and again THANKS! :banana2:

[CBT]

I would like to thank Motorking for the FREE Autolite #XP104 Iridium plugs!
If there's anything I can do for you in the future Marauder related or not just send me a PM. and again THANKS! :banana2:
Well? Can you tell a difference?

[musclemerc]

I won't install them till the weekend. I plan on doing a full tune up, JLT prefilter, and a set of LFP COP connectors.

[fastblackmerc]

Hopefully mine will be there when I get home.

[CBT]

I won't install them till the weekend. I plan on doing a full tune up, JLT prefilter, and a set of LFP COP connectors.
Aye, let us know if it's thumbs up or thumbs down on these :beer:

[musclemerc]

I will post the results.

[Mr. Moto]

I got my plugs from Jay yesterday and I am heading out now to get the electric grease and boots. Also going to do some other tune up items as well. I will post my results sometime next week.

[Mr. Moto]

Started changing out the plugs and I was not prepared for the boot removal and re-install. Taking a little more time to get the new plugs installed.

[musclemerc]

Just don't forget the antisieze, dielectric grease, and torque them 10lbs.

[FordNut]

I haven't got mine swapped yet, maybe tomorrow. It's supposed to be close to 50 degrees tomorrow.

Anyway, Jay sent me the XP103 plugs, which are 1 step colder than stock, since I'm blown.

First observations: They do not come pre-gapped like most iridium plugs, and the box specifically states that they should be gapped to the specs for the application. When gapping them, it is really easy to measure the gap. The positive electrode is about the same as any plug, but the negative electrode has a little platinum nipple on it facing the positive electrode. Standard electrodes can be hard to measure if the negative electrode isn't perfectly perpendicular to the positive electrode. The little tip on the negative electrode should provide better control of where the spark actually occurs since it provides some focusing. There also should be less shrouding of the flame kernel due to the shape of the negative electrode, it is beveled at the tip instead of flat across the surface. One negative I noticed, maybe not that important but most high end plugs these days come with a protective sleeve slipped over the threads to prevent damage to the tip of the plug. I believe NGK uses cardboard while NipponDenso uses plastic. These plugs were just put in the box.

I'll see how they work this weekend, sorry but I don't have access to a dyno so it will be SOTP testing.

[Mr. Moto]

Well the new plugs are installed. I had 1/2 a tank of gas or just under when I finished the install. I check my MPG when I filled up and it was at 17. That is unchanged but it was only 1/2 a tank of fuel. I filled up and I will drive normal and then check the numbers when I fill up again.