Can anybody tell me why it is beneficial to run colder heat range plugs? I have a tune and most people seem to run colder with a tune. Do you lose power or gain power by running colder? I'm looking at the xp103's and xp104's in particular. Thanks!
Can anybody tell me why it is beneficial to run colder heat range plugs? I have a tune and most people seem to run colder with a tune. Do you lose power or gain power by running colder? I'm looking at the xp103's and xp104's in particular. Thanks!
-2003 Marauder Black 300A Eaton swapped
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-2007 GT500 VMP Gen II
-1990 Fox Notchback. HCI/Supercharged
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2004 DTR Marauder, Built 26 February 2004, Inservice: 02 July 2004 Retired from DD 17 July 2008. Survived the cut, 28 April 2012. Back as a DD as of 18 November 2012.
what if you have a k&n cai,steeda underdrive pulleys php intake spacer,180 thermostat,& a lidio tune. should i go with the colder spark plug like the autolite xp103s or should i get the xp 104s ?
That's what I thought. My understanding was always the hotter the spark the better. But I have read in a few places that even with just a tune on a MM, you will disintegrate stock heat range spark plugs. Yea, and 30 rwhp is enough to make sure i'm getting this right! haha
-2003 Marauder Black 300A Eaton swapped
-2003 Redfire Mustang Cobra Convertible VMP Gen II
-2007 GT500 VMP Gen II
-1990 Fox Notchback. HCI/Supercharged
-1995 Thunderbird SC
-1996 Bronco 460 EFI Conversion. 9" Lift 35" BFG
-1999 F350 Super duty 7.3
-1989 Lesabre T-type
-2007 Cadillac DTS
-2012 Cadillac Escalade
-2015 Challenger Hellcat Sublime green A8
Running a colder heat range plug allows your tuner to add more timing. More timing = more horsepower. Just installing colder heat range plugs does nothing unless your tune compensates for the colder heat range.
When you cant make them see the light, make them feel the heat.
Ronald Regan
"The only way to deal with the Islamic State - these blood thirsty, blood-drunken, terrorists -
is to kill them, keep on killing them, until you kill the last one, then you kill his pet goat."
Lt. Colonel Ralph Peters
Be polite, be professional, but have a plan to kill everybody you meet.
"I come in peace. I didn't bring artillery. But I'm pleading with you, with tears in my eyes, if you **** with me, I'll kill you all"
General James Mattis
Specifically if your running a Dennis Reinhart tune, you should run the colder plugs and a 180* tstat. If your running a Zack or Lidio tune then use the stock heat range.
Here is the info from Lidio's site:
http://www.alternativeauto.com/prods...uder_tune.html
2nd paragrapgh under the dyno sheets
What is the stock heat range?
I don't know the specific heat range but here is my list of plugs:
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 (+1 colder)
Here is some good info on spark plug heat ranges, etc.
http://www.autolite.com/carcare/techSpecs.php
When you cant make them see the light, make them feel the heat.
Ronald Regan
"The only way to deal with the Islamic State - these blood thirsty, blood-drunken, terrorists -
is to kill them, keep on killing them, until you kill the last one, then you kill his pet goat."
Lt. Colonel Ralph Peters
Be polite, be professional, but have a plan to kill everybody you meet.
"I come in peace. I didn't bring artillery. But I'm pleading with you, with tears in my eyes, if you **** with me, I'll kill you all"
General James Mattis
Heat range has nothing at all to do with the electrical characteristics or quality of the spark. It refers to the ability of the plug to transfer heat from the combustion chamber to the head. A "hot" plug retains more heat, while a "cold" (or cooler) plug transfers more heat to the head.Uh...no. If your tune is so radical that you have massive detonation you might disintegrate the pistons...But I have read in a few places that even with just a tune on a MM, you will disintegrate stock heat range spark plugs.
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2004 DTR Marauder, Built 26 February 2004, Inservice: 02 July 2004 Retired from DD 17 July 2008. Survived the cut, 28 April 2012. Back as a DD as of 18 November 2012.
Thats correct. The dyno tuner was at a loss as to why the car lost 30rwhp. He pulled the XP-103's and asked why I put those in. I can't repeat what he said here. He put OEM plugs in and bingo, the HP came back. As I've said elsewhere here, it may be just my car, or it could be that they were not the correct heat range. For a long time I had listed $310 spark plugs in my sig.
2004 DTR Marauder, Built 26 February 2004, Inservice: 02 July 2004 Retired from DD 17 July 2008. Survived the cut, 28 April 2012. Back as a DD as of 18 November 2012.
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