Iridium Spark Plugs

[CarlC]

Just wondered if many of you have swapped out the standard plugs for Iridium Spark plugs?

Given the fairly cheap price, potential fuel saving and increase in response is it worth upgrading?

[Guest teigan]

i've got them on my car. no noticable performance boost though.

[ragingfool35]

I use them in my Esprit.

long life is the measurable benifit.

combustion chamber dynamics is still

more art than science, so believing that a spark

a couple of thousandths longer in length

increases performance is really up to

the individual.

Edited November 17, 2005 by ragingfool35

[rens914]

cheaper ?

The Iridium ones are about 4x times the price

Iridium = 4 for

[WayneB]

If it makes you happy to spend a ton of money on spark plugs buy them!

Every couple of years a new miracle sparkplug is launched

Remember the Splitfire?

In some of my old car magazines from the 1930s, you can see the same con job in action even then!

I use the NGK s in mine

[Guest Die Hard Lotus]

If you use Iridiums, make sure you stick with NGK's as Densos are no good in our cars.

They soot up too quickly

[hovgaard]

I have never used iridiums myself, it just seems a bit over the top to me. Use NGK or Champion, rather than Bosch, I say.

[Guest teigan]

i get them for free, but i can't recommend iridiums over conventional. i think my car came stock with NGK.

[CarlC]

Well thats seems fairly conclusive. Apart from perhaps lasting longer than standard plugs there appears to be no one shouting up for the iridium plugs.

Also given the cost and amount of miles I get through - This sounds like

[lewtus]

I have had them for years install and forget about them. If plan on modding the car then it will make a bigger difference with more air and fuel. THere was tests done years ago and they saw 3-5 hp from that alone with the iridiums.

Just wondered if many of you have swapped out the standard plugs for Iridium Spark plugs?

Given the fairly cheap price, potential fuel saving and increase in response is it worth upgrading?

<{POST_SNAPBACK}>

[CarlC]

I have had them for years install and forget about them. If plan on modding the car then it will make a bigger difference with more air and fuel. THere was tests done years ago and they saw 3-5 hp from that alone with the iridiums.

<{POST_SNAPBACK}>

At last some one backing the Iridum plugs !

Cheers Lew, you seem to be a lonley voice at present. If I hadnt got all new plugs at a recent full service I probably would have given them a go. It would have been good to try them out and report back to see if i could feel any difference.

[Htown]

At last some one backing the Iridum plugs ! 

Cheers Lew, you seem to be a lonley voice at present. If I hadnt got all new plugs at a recent full service I probably would have given them a go. It would have been good to try them out and report back to see if i could feel any difference.

<{POST_SNAPBACK}>

I run Denso IW22's in my 90SE (one step colder than the stock heat range), and IK20's in my Audi S4 (stock car, stock heat range). The direct replacement for the NGK BPR6EKN's are IW20's from Denso.

I've never been a big fan of multiple tipped plugs, so I went with the Densos.

As far as a feeling a difference between plugs, I really doubt it. The Densos are just more easily available for me in the correct heat ranges I need.

fwiw-

Craig

90SE

[hotrod3]

Just wondered if many of you have swapped out the standard plugs for Iridium Spark plugs?

Given the fairly cheap price, potential fuel saving and increase in response is it worth upgrading?

<{POST_SNAPBACK}>

:rolleyes:I work at MSD Ignition! If your going to run some of MSD Ignition's Distributorless coils, it would be a good idea to run these plugs IW22 ,which are a little colder plug recommendation,since the MSD Coils produce around 45,000 volts. The IW22 Iridium plugs have a high melting point. As far as producing more power,we haven't seen an increase in horse power on the dynos with any spark plug. But they are good plugs,if you can afford the price .

[lewtus]

My car is 400HP and 450TQ right now and I would say the plugs are uneventful..and that is good thing as I run more air and fuel...boost is stock right now. Car starts up after every winter quickly and I check them on occasion for gappage and nothing changes...last pair I hope to buy. My Saab runs through plus every 25K and I would swithc to the Iridiums in them as well...

Lew

:rolleyes:I work at MSD Ignition! If your going to run some of MSD Ignition's Distributorless coils, it would be a good idea to run these plugs IW22 ,which are a little colder plug recommendation,since the MSD Coils produce around 45,000 volts. The IW22 Iridium plugs have a high melting point. As far as producing more power,we haven't seen an increase in horse power on the dynos with any spark plug. But they are good plugs,if you can afford the price .

<{POST_SNAPBACK}>

[esprithk]

wow...thx for the tips on the spark plugs.

how about upgradeing the spark plug wires? any recommendation..thx!