Which Plugs..........NGK or Denso

Don't Iridium spark plugs run colder & are for trucks w/ S/C's? On my 06 Tacoma Sport I spent like $40 to buy Iridium plugs in my 4.0 V6. I just thought they were a higher performance spark plug. At the time I hadn't read that people w/ S/C'd trucks used them. I couldn't tell a difference. Just a waste of money. So in my current truck, 04 DC Tacoma V6. I'm running

$18 Denso K16TR11 Spark Plugs, Pack of 4

Denso K16TR11's Toyota Part#

$8 90919-01192 Toyota Genuine Spark Plug

90919-01192. I got them for $21.54.

 

I think colder has to do with gap? Iridium have better concentrated spark then regular once so I think they are better. Just got mine in mail yesterday

 

either one works. When i changed mine, each side was a different set like mentioned before. I just changed them all to denso.

 

Had NGKS in my mazdaspeed and Tacoma.. never had any issues.

 

Here's a ball scratcher for ya...how about gap?

The oem dual electrode plugs call for a .40 gap but is that .20 for each electrode or .40 for each??

BTW I changed mine at 125k after I bought it. Replaced with Denso , started getting a miss on #3 at 165k. Ended up being a cracked insulator. Not blaming the plug brand but rather mileage.
Replaced all with NGK cause they were in stock. Runs great.

 

Yeah, both brands are good quality. More important is the gap, as you mention. I did my plugs this past summer but don't remember what the gap was. On the dual plugs, I'm guessing each electrode gets that specified spec.

 

Did any put

Pretty sure it's still .4 gap between electrode and ground electrode(threads is the ground couse it screws into block which is grounded to negative terminals. Dual grounds is just as safety factor I guess so electricity will arc to either one

 

Wonder if anybody ever ran pulse plugs. They only good for 50k or so but supposedly larger spark or something

 

I run NGK double platinum's and never run anything less that 91. The truck is more sensitive to air temperature now, meaning the colder the ambient temp the stronger the motor pulls. I feel like the truck woke up a littlebit from the old plugs
Maybe it's time for the deck mod for some RnD lol

 

What ever plug you use make sure the engine is cold and put a little antiseze on the threads.

 

Denso actually specifies to not put anti-seize on the threads. I'd always applied a dab, until I read that. I think it has to do with the plating on the plug, but I'm definitely not positive. I'll try to find that again in the internets.

 

I always have on any aluminum head. Seen to many galled threads before. Just I little bit though.

 

Yep, me too, before. Found it interesting is all.

 

Yep. On the Denso plugs I bought it says the nickel plating has self lubricating properties and if you use anti seize. You'll have a bigger chance of over tourqing the spark plugs because of the combination of nickel plating and aluminum heads/threads. But I understand where you're coming from @mechanicjon