denso iridium or splitfire ? - Toyota Yaris Forums

JapRulezz · 07-02-2009, 07:42 PM

which is better denso iridium or split fire spark plugs

kngrsll · 07-02-2009, 07:43 PM

do you have over 100k miles? Thats when the stock iridium plugs need replacement. if you are that worried, just take them out and clean them.

JapRulezz · 07-02-2009, 08:47 PM

i live in egypt my stock plugs are denso but not iridiums

yaris-me · 07-03-2009, 02:54 AM

I believe Denso is the brand of the iridium plugs.

I don't think Toyota would use anything else.

RedRide · 07-03-2009, 03:33 AM

Quote:

Originally Posted by yaris-me

I believe Denso is the brand of the iridium plugs.

I don't think Toyota would use anything else.

They also use NGK iridium on ocasion.
Denso, NGK are both great plugs.

JapRulezz · 07-03-2009, 07:49 AM

do i have anything to worry about installing them , gapping or misfiring issues ?
and should i expect any power gains or better MPG ?

Yaris Hilton · 07-03-2009, 11:20 AM

Spark plugs are spark plugs so far as engine power and fuel economy are concerned. If the plug's firing, the engine doesn't know or care what the electrodes are made of or if there's more than one ground electrode. The spark can only jump to one at a time. Claims of performance improvement with changes in plug design are snake oil. The advantage of the iridium plugs is the 100,000 mile life. The iridium plugs are shipped pregapped and should be OK if they haven't been dropped or something. It's not recommended to gap them yourself as the iridium is very brittle.

Tamago · 07-03-2009, 11:35 AM

denso iridiums for NA applications
plain ol copper for FI applications

aeipee13 · 07-03-2009, 12:42 PM

denso iridium hands down.

07-02-2009, 07:42 PM	#1
JapRulezz Drives: yaris sedan 2NZ-FE Join Date: May 2007 Location: Egypt Posts: 75	denso iridium or splitfire ? which is better denso iridium or split fire spark plugs

07-02-2009, 07:43 PM	#2
kngrsll Apexing Egg!! Drives: 07 Toyota Yaris white hatch Join Date: Oct 2006 Location: Spartanburg, SC Posts: 872	do you have over 100k miles? Thats when the stock iridium plugs need replacement. if you are that worried, just take them out and clean them. __________________ HighTach Motorsports 2007 Toyota Yaris-ARGH!! Mods: Tokico HTS, 6.6 kg F, 6.1 kg R custom springs, 23 mm RSB, 2-way TRD LSD, 15x7 +25 Team Dynamic wheels, 195/55/15 Dunlop Star Specs, Cobra Suzuka S

07-03-2009, 02:54 AM	#4
yaris-me Learn to Relax Drives: 2007, Meteorite, LB Join Date: Dec 2008 Location: Anaheim, CA Posts: 2,070	I believe Denso is the brand of the iridium plugs.I don't think Toyota would use anything else.

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07-02-2009, 08:47 PM	#3
JapRulezz Drives: yaris sedan 2NZ-FE Join Date: May 2007 Location: Egypt Posts: 75	i live in egypt my stock plugs are denso but not iridiums

07-03-2009, 07:49 AM	#6
JapRulezz Drives: yaris sedan 2NZ-FE Join Date: May 2007 Location: Egypt Posts: 75	do i have anything to worry about installing them , gapping or misfiring issues ? and should i expect any power gains or better MPG ?

07-03-2009, 11:20 AM	#7
Yaris Hilton Half a Bubble Off Plumb Drives: 2009 Yaris Sedan Join Date: Mar 2009 Location: Bristol, Tennessee, USA Posts: 1,593	Spark plugs are spark plugs so far as engine power and fuel economy are concerned. If the plug's firing, the engine doesn't know or care what the electrodes are made of or if there's more than one ground electrode. The spark can only jump to one at a time. Claims of performance improvement with changes in plug design are snake oil. The advantage of the iridium plugs is the 100,000 mile life. The iridium plugs are shipped pregapped and should be OK if they haven't been dropped or something. It's not recommended to gap them yourself as the iridium is very brittle.

07-03-2009, 12:42 PM	#9
aeipee13 DKDC Drives: Yarlet Join Date: Aug 2006 Location: los angeles Posts: 200	denso iridium hands down.