C.O.P & Spark plugs

[Mike827]

Okay its time to change my spark plugs and I wanna go with better performance spark plugs. I was reading about the Autolite XP103. How do these compare to the ngk spark plugs. I was also thinking about changing my c.o.ps also. The two I'm thinking about are weapon x and accel. Which one is best for our cars. Thanks. And also I'm dyno tuned if that makes a difference.

[fastblackmerc]

Okay its time to change my spark plugs and I wanna go with better performance spark plugs. I was reading about the Autolite XP103. How do these compare to the ngk spark plugs. I was also thinking about changing my c.o.ps also. The two I'm thinking about are weapon x and accel. Which one is best for our cars. Thanks. And also I'm dyno tuned if that makes a difference.

Why change the COPs? I'd go with the GMS coil connectors instead.

XP103's are one heat range colder plug, so unless your tune takes that into account go with a normal heat range plug.

Here is a list of spark plugs that will fit the MM. From personal experience I would never run Champion plugs in a Ford.

If your NA the iridium plugs are a waste of money. Also stay away from the "fancy" plugs.. ie Splitfire, etc. a waste of money.

Change your plugs once a year (they are cheap)

Spark Plugs:
Stock Heat range
Autolite –104
Autolite Double Platinum – APP104
Autolite Iridium / Xtreme Performance – XP104
Champion Copper Plus – RS12YC
Champion Platinum Power – 3401
Champion Double Platinum – 7963
Champion Iridium – 9204
Bosch – BSH7571
Bosch Platinum – BSH4205
Bosch Platinum+2 – BSH4305
Bosch Platinum+4 – BSH4458
NGK V Power – TR55
NGK G Power Platinum – TR55GP
NGK Laser Platinum – PTR5C-13
NGK Irdium IX – TR55IX
AC Delco – R42LTS6
AC Delco Platinum – 41810

Colder Heat range
NGK – TR6 (+1 colder)
Autolite Iridium / Xtreme Performance - XP103

[babbage]

With Iridiums you can run more gap - and make more power better efficiency.

Depending on miles I might get new cops too. I run the ngk tr6 plugs with GMS ropes.

[musclemerc]

+1 It's your car you can do whatever you like but aftermarket COP's on a N/A MM will not perform any better than OEM's. You asked for opinion's and this is just mine.

If you decied to save some cash shoot me a PM. I can get you brand OEM COP's for $110.00 shipped, then go get yourself a set of lightning force performance COP connectors, they are exactly the same as the GMS at a lower price.
http://www.lightningforceperformance. com/Granatelli_HIGH_OUTPUT_Coil_On _Plug_Connectors_4_Valve.html

I like the Autolite XP103's/XP-104's great plug for the money. If you can wait on shipping goto rockauto.com they are way cheaper and you will get a $2.00 rebate on each plug
http://www.rockauto.com/lang/en/promo.html

Like FBM said if your dyno tune does'nt take advantage of the colder plugs then stay with the stock range XP-104

Put the cash you save towards more mods.

[fastblackmerc]

If you decide to save some cash shoot me a PM. I can get you brand OEM COP's for $110.00 shipped, then go get yourself a set of lightning force performance COP connectors, they are the GMS at a lower price.
http://www.lightningforceperformance. com/Granatelli_HIGH_OUTPUT_Coil_On _Plug_Connectors_4_Valve.html



Fixed it or you.

[musclemerc]

+1 GMS is the Mfg. they're packaged as LFP. Same thing, 96 bucks...