Best Spark Plugs?

[Colt]

What is recommended for long life plugs?

Any issues with Denso Iridium's. Any plugs that don't seem to last or do well? Any that stand out as the best?

Thanks.

[martyo]

NGK 4177

...

[RF Overlord]

^^^what Marty said^^^

Just no Bosch and no Champion.

[fastblackmerc]

Never ever use Champion plugs in a Ford.

NGK, Motorcraft, Autolite,

Spark Plugs:
Stock Heat Range
Autolite –104
Autolite Double Platinum – APP104
Autolite Iridium / Xtreme Performance – XP104
NGK V Power – TR55
NGK G Power Platinum – TR55GP
NGK Laser Platinum – PTR5C-13
NGK Irdium IX – TR55IX


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

Plugs are cheap, I change mine every two years whether they need it or not.

[03Merc]

Never ever use Champion plugs in a Ford.



NGK, Motorcraft, Autolite,



Spark Plugs:

Stock Heat Range

Autolite –104

Autolite Double Platinum – APP104

Autolite Iridium / Xtreme Performance – XP104

NGK V Power – TR55

NGK G Power Platinum – TR55GP

NGK Laser Platinum – PTR5C-13

NGK Irdium IX – TR55IX





Colder Heat Range

NGK – TR6 (+1 colder)

Autolite Iridium / Xtreme Performance – XP103 (+1 colder)



Plugs are cheap, I change mine every two years whether they need it or not.


$15.00 for a set of 8. Does that sound right?


2004 MM Build #1618 & DTR #537

[Bobby Clobber]

Colder for Trilogy setup?

[fastblackmerc]

$15.00 for a set of 8. Does that sound right?


2004 MM Build #1618 & DTR #537

Set of 8 plugs... which ones??

[03Merc]

Set of 8 plugs... which ones??


NGK 4177

eBay item number 231532371007


2004 MM Build #1618 & DTR #537

[fastblackmerc]

NGK 4177

eBay item number 231532371007


2004 MM Build #1618 & DTR #537

NGK doesn't list that P/N for a Marauder.

P/N's are:

TR55 - V-Power - RockAuto price: $1.52 ea.
TR55GP - G-Power - RockAuto price: $2.37 ea.
PTR5C-13 - Laser Platinum - RockAuto price: $7.21 ea.
ITR5F13 - Laser Iridium - RockAuto price: $9.21 ea.
TR55IX - Iridium IX - RockAuto price: $6.18 ea.

http://www.ngksparkplugs.com/part_finder/car_truck_suv/results.asp?engineid=32665

[03Merc]

NGK 4177



...


NGK TR-6 4177 V-Power is what You recommend?


2004 MM Build #1618 & DTR #537

[fastblackmerc]

Colder for Trilogy setup?

N/A or F/I as long as your tune is setup for a colder plug.

[fastblackmerc]

NGK TR-6 4177 V-Power is what You recommend?


2004 MM Build #1618 & DTR #537

TR6 is a colder heat range.

[fastblackmerc]

A good rule of thumb: use one heat range colder for every 75–100hp added.

[martyo]

NGK TR-6 4177 V-Power is what You recommend?


2004 MM Build #1618 & DTR #537

Yep.

..............

[03Merc]

Yep.



..............


Thank You Sir!


2004 MM Build #1618 & DTR #537

[martyo]

Thank You Sir!


2004 MM Build #1618 & DTR #537

My pleasure.

[Bobby Clobber]

Sorry,

My question should have been,what is the Motocraft SP 505 equivalent

[fastblackmerc]

Sorry,

My question should have been,what is the Motocraft SP 505 equivalent

Autolite 103

Motorcraft SP505's are still available on eBay.

http://www.ebay.com/itm/Ford-Motorcraft-SP-505-Spark-Plugs-4-ea-/130419961417?hash=item1e5da2ae 49&vxp=mtr

8 plugs for $16.00 with free shipping.

NOTE: I have no interest in the eBay listing or seller.

[fastblackmerc]

Sorry,

My question should have been,what is the Motocraft SP 505 equivalent

Or just use NGK TR6's.

http://www.ebay.com/itm/4177-NGK-TR6-V-POWER-SPARK-PLUGS-SET-OF-8-/231532371007?hash=item35e8679c 3f&vxp=mtr

Just as good if not better than the Motorcraft / Autolite.

[Bobby Clobber]

No problem with the SP 505, ( 2/3 sets )
Just always worry about that two piece construction.:depress:

[Colt]

NGK 4177

...

Would they be better than the NGK TR55 3951 or the NGK TRIX 7164 ?

Would the NGK 4177 need to be changed often/yearly?

Keep a .060 gap?

Thanks.

I always did Motorcraft/Autolite for Ford and Champion for Dodge/Jeep.

[martyo]

Would they be better than the NGK TR55 3951 or the NGK TRIX 7164 ?

Would the NGK 4177 need to be changed often/yearly?

Keep a .060 gap?

Thanks.

I always did Motorcraft/Autolite for Ford and Champion for Dodge/Jeep.

Use the 4177 gapped to .045

Replacement interval is effected by mileage, etc.

[03Merc]

Yep.



..............


Can I use them right out of the box or do I have to change the gap to Your specs?


2004 - MM 1618 - DTR 537

[fastblackmerc]

Can I use them right out of the box or do I have to change the gap to Your specs?


2004 - MM 1618 - DTR 537

Always.. always check the gap.

[03Merc]

Always.. always check the gap.


Ok I will, Thank You.


2004 - MM 1618 - DTR 537

[martyo]

Always.. always check the gap.

Yep.


..............

[RF Overlord]

Always.. always check the gap.To expand on that, just like there's no such thing as "lifetime transmission fluid", there's also no such thing as "pre-gapped" plugs. The manufacturer has no way of knowing your application. Sometimes it's a happy coincidence...

[03Merc]

Yep.





..............


Does Your tune require any adjusting for these plugs?


2004 - MM 1618 - DTR 537

[martyo]

Does Your tune require any adjusting for these plugs?


2004 - MM 1618 - DTR 537

Which plugs?

[03Merc]

Which plugs?


The NGK 4177 gapped to .045.


2004 - MM 1618 - DTR 537

[martyo]

The NGK 4177 gapped to .045.


2004 - MM 1618 - DTR 537

Our NA tune will work well with those plugs.

[03Merc]

Our NA tune will work well with those plugs.


Ok, cool. Just want to check with You b4 doing anything to this Engine. So far the tune has been awesome. Thanks again.


2004 - MM 1618 - DTR 537

[RF Overlord]

Use the 4177 gapped to .045.045 on an NA car?

[martyo]

.045 on an NA car?

Yes.

...............

[1Marauder]

Use the 4177 gapped to .045

Replacement interval is effected by mileage, etc.

Marto, sorry to ask.

My car is not yet supercharged and has 29,000 miles and 17,000 miles respectively. I don't know if either had been changed yet.

4177 to 45 gap??.

Seems like 13 years, regardless of mileage or lack driving issues might be a good time to changed them(?). Yes?

[Fly007]

Man wish I would have read this earlier, changed mine yesterday to the NGK TR55GP and gapped at .054.

[champ1173]

Ya know, I wondered the same thing about gapping the plugs to .045, but I figured I'd try it. To my surprise, my MM runs a lot smoother now and has a quicker response. Thanks Marty for your knowledge.

[Fly007]

Looks like I will be pulling plugs and re-gapping again.... So are the NGK TR55GP still a good plug?

[wannaMM]

My local flaps INSISTED I buy another # NGK Plug.... it really doesn't matter which one it was, on fire up,motor ran so ragged that I shut down.

Took an original plug , laid on counter and said "THIS ONE ONLY""8 please".

Now running smoothly . gapped a little wide (according to this thread) but servicable.

I will be buying the NGK 4177 gapping to .045. and installing in the near future,as I know that Marty-o has seen more than I can count.....

[Fly007]

Mine is running great, better than the 97,000 mile motorcrafts that were in it anyway, but I also know proper gapping is huge on plug performance, I just went with what the underhood said to gap at, but as you said sounds like Marty has been around the block a time or two and knows whats what.

[1Marauder]

Marto, sorry to ask.

My car is not yet supercharged and has 29,000 miles and 17,000 miles respectively. I don't know if either had been changed yet.

4177 to 45 gap??.

Seems like 13 years, regardless of mileage or lack driving issues might be a good time to changed them(?). Yes?

Marty?

Will call tommorow, as I need a tune for planned jmod too.
Coll?

[martyo]

Marty?

Will call tommorow, as I need a tune for planned jmod too.
Coll?

Sorry for the late reply.

My time has not been my own this week.

4177 .045 gap.

Let me know when you're ready for the tune.

[Canadasvt]

Today I replaced original plugs with 154,800km on them ( miles ? ) They still looked good. I run the car pretty hard, with WOT at least a few times a week. Run Shell 91 every 4th fill-up, with Sunoco 91 between. Shell cleans out any crap left behind? If I had known the Motorcraft were that good, I would not have replaced them with the NGK. Hoping I get another 150k out of these.

[vtwoodsman]

^^^what Marty said^^^

Just no Bosch and no Champion.

I've been using Bosch Platinum II's since 2009 with no issues.
Solid sparkplugs all the way.

:)

[95chickn]

Sooo yall are saying tr6 are the way to go?
Are the tr55ix tr6ix (iridiums) just crap for they cars?
Wats the pros and cons?

[RubberCtyRauder]

Sooo yall are saying tr6 are the way to go?
Are the tr55ix tr6ix (iridiums) just crap for they cars?
Wats the pros and cons?


TR6 are used on supercharged cars a lot as they are a cooler plug, and can be used on NA cars. I don't know the differences.

(edited my post has I had bad info)

[martyo]

TR6 are used on supercharged cars as they are a cooler plug, not helpful in a N/A car..wrong plug to use.

We recommend the 4177 (TR6) in both NA and SC Marauders.

[RubberCtyRauder]

We recommend the 4177 (TR6) in both NA and SC Marauders.

I thought they were a cooler plug? like one range cooler than factory

[martyo]

I thought they were a cooler plug? like one range cooler than factory

Yes, they are.

[RubberCtyRauder]

NA cars can benefit from a cooler plug even without a tune? or it doesn't really effect anything versus the hotter plug. I guess I got bad info some time ago. I blame the internetz.

[martyo]

NA cars can benefit from a cooler plug even without a tune? or it doesn't really effect anything versus the hotter plug. I guess I got bad info some time ago. I blame the internetz.

I went to Google University!

[RubberCtyRauder]

I registered too late to attend this fall

http://i637.photobucket.com/albums/uu92/mdnos/finals-break-010-05052013_zpsk6k3oxdd.jpg

[fastblackmerc]

NA cars can benefit from a cooler plug even without a tune? or it doesn't really effect anything versus the hotter plug. I guess I got bad info some time ago. I blame the internetz.

It's my understanding that you can add more timing with a colder plug.