Stock Iridium Spark Plugs?

[xyntax]

I read on my manual that the 2AZFE engine has Iridium spark plugs installed and 1MZFE has Platinum and that in replacing the spark plugs, we should abide to what was stock. Is there any reason for this variation at all?

[Turbosolara]

Maybe because the 2AZFE has higher compression? i think they will use iridium to replace platimum in the future, to get better mpg and performance

[Hsakuragi]

From what i remember is that 02-03's engines are using Iridium plugs, no matter it's at 4 or 6.

Maybe it;s the reason why the IK22 won't fit on my car?

[Yanks0114]

Maybe because the 2AZFE has higher compression? i think they will use iridium to replace platimum in the future, to get better mpg and performance

I'm pretty sure the 1mz has higher compression.

1MZ = 10.5:1
2AZ=9.6:1

[xyntax]

I read online that most new cars will come with Iridium spark plugs installed because it offers better efficiency. It also cools faster than any other type, so it prevents premature ignition and stuff. There are lots of advantages on it. Just check it out at HowStuffWorks.com

[pro956]

From what i remember is that 02-03's engines are using Iridium plugs, no matter it's at 4 or 6.

Maybe it;s the reason why the IK22 won't fit on my car?

ik22's won't fit on 03s???
with they fit on 02s?
lmk, i was about to buy em

[impactX]

Plugs don't add performance.

If anything, copper plugs are the best since you change them often and you'd restore the "lost" power more often.

People use Iridium plugs because it may be hard to change the plugs on their applications and Iridium plugs would buy them some more time before they need to change the plugs.

[Hsakuragi]

From what i remember is that 02-03's engines are using Iridium plugs, no matter it's at 4 or 6.

Maybe it;s the reason why the IK22 won't fit on my car?

ik22's won't fit on 03s???
with they fit on 02s?
lmk, i was about to buy em

Well that mechanic told me the plugs won't fit while he was installing supercharger and it was at the dealer. I was suprised becasue most of the people here said it's going to be fit. But actually it's NOT.

I think Toyota DID made minor changes on the engine for the 1.5.

[pro956]

thanks,
any other opinions on this?
i'm about to have my supercharger installed (after 10 million years)
i got ngk blue plug wires, i was going to get denso ik22s
i was under the impression that i should do that, as they burn cooler etc etc

i have a manual 02 solara 3.0L

[Hsakuragi]

i think the wires will do fine, where u going to get the charger install? well u can get the plugs from autozone, test does it fits or not, if not, you can always return them for store credit.

[thealkimo]

I recently switched to NGK Iridium IX's, and I haven't noticed any performance gains...but I seem to idle smoother than before. For any performance gains out of the ignition systems I believe installing Magnecor or Nology ignition wires provide the most.

[Fletch]

impactX Posted: Tue Mar 30, 2004 8:23 am Post subject:

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Plugs don't add performance.

If anything, copper plugs are the best since you change them often and you'd restore the "lost" power more often.

People use Iridium plugs because it may be hard to change the plugs on their applications and Iridium plugs would buy them some more time before they need to change the plugs.

I agree. My roommate showed me some threads on VWVortex forum about the HP claims of different plug manufacturers. They had some dyno charts from before and after plugs were changed after the recommended interval and there was no increase in power.

I have a feeling the plug manufacturers get their HP #'s from replacing a totally worn out, inneffective plug with a new one of theirs, then there might be an increase in power.

I don't think the OEM recommendation or Denso Iridiums will make and noticable difference, but get new plugs before you toss a S/C on because once it's on, you can't get to the rear bank.

[pro956]

I don't think the OEM recommendation or Denso Iridiums will make and noticable difference, but get new plugs before you toss a S/C on because once it's on, you can't get to the rear bank.

i don't even have 10,o00 miles yet

[xyntax]

I guess you can only see performance gains if the previous/original plugs were not doing its job properly

[pro956]

I guess you can only see performance gains if the previous/original plugs were not doing its job properly

okay, i was just under the impression that you should get better spark plugs when you add on a supercharger

i think i'm going to just stick with the stock plugs then and just change the wires b/c i already got em-- only 40 bucks anyway