My friend has a set of IK22's (plugs denso recommends for the vq30de) that he doesnt need anymore. I was wondering if anyone on here had any positive or negative experience with them. If so, please respond, and if no one has used them I'll let everyone know. TIA

 

i have em, there is a big difference compare to NGK Coppers. (Previous set)

 

our engines are really designed to use ngk plugs-- NOTHING ELSE. you may or may not have a bad experience with them, but i would avoid them on principle.

 

really. i have had denso for over a year and they work just fine.
and i hardly think are engines are designed to use NGK`s only.
come one

 

I agree. I've used denso iridiums for about 2 years now. Car still runs like new with 72000 miles.

NGK is what the car came with. Doesnt mean NGK is the only plug that will work. The car will run on Autolites if you want to use Autolites.

I just got the Iridiums because my shop gave me a good deal ($6 a plug) and because I dont have time or the patience to do a tuneup every year. I'd rather do something else... like keep changing my bose speakers.

 

I am using them. i do not recommend them and i am going to switch back to stock plats.i am not trying to argue with anyone but I dynoed with plats then iridiums and the plats showed better gains . My previous Pts were NGK PFR6G11 which were actually 1 step colder than i should have been running but i replaced them with Denso IK16. On the dyno my curve was very jagged showing an ignition problem. This was with the denso's. When i compared it to the one step colder plat dyno,dyno was much smoother.
My car does run fine and even with the Denso plugs but on the dyno i can see the diffrence. Knowing what i know now i should have just bought the stock platiniums.
NGK PFR5G11.
A little known fact that i found out while doing research DENSO iridium pluga are only good for 30000miles(this is right on their website in the FAQ's). So what it ends up being is your paying platinum plug price for copper plug life.
Hey its up to you.

 

Use NGK. Copper is the way to go unless serious FI.

 

Nippon/Denso and NGK are sister companies...so they are vitually the same plug with a different label

As for using NGK....whether its for a car, motorcycle or even your snowblower, if the ignition system was designed around NGK nothing else will run as well. Many here have tried to stray from NGK in their car, including me, with poor results. I have also tried other brands in motorcycles and snowmobiles, all with poor results.

BKR5EGP will get you 35-40K per set and are around $3.30 each at clubplug.net

 

was there any kind of power drop with the densos?

Ive been using them for about 2 years now; i havent had any problems..i just remember feelings a big difference with them, but that probably was because the original ones were old and needed replacement

 

denso are garbage unless your boosted i had denso they suck they deteriate fast go ngk.

 

Iridium is 6 times harder, 8 times stronger, and has a melting point 1200 degrees higher than platinum. Put that into a harsh environment such as an engine piston chamber, and you have a spark plug that can resist wear much better than platinum

you must have a crappy engine


http://www.densoiridium.com/faq.php

 

get an ngk iridium plug if it matters that much to you-- it'll give you a colder spark than the stock plugs though, which i think will give you less power in an n/a engine.

like the maxmods quote said, just because you put in denso's doesn't mean your car will blow up, but it IS designed to use ngk's.

 

Just sharing my own personal observations i paid $66 for the denso iridiums IK16 . i paid $57+shipping for the NGK PFR6G11. if you look at my dynos you will see the diffrence in the smoothness of the cuve. I am just giving you advice based on my mistake it has cost me $120 in plugs and 4 hours in dyno time to come to this conclusion. You can use whatever plug you like but stick to stock NGK's. if anyone likes i can send them the dynos for comparison.

i am not sure you were talking to me chuckie but i just recently ran a 14.7 and dynoed 182whp and 193wtq, not bad for a "crappy engine". (with cali emissions)