View Full Version : Iridium plugs and Nitrous


Z28XTC
06-07-2006, 02:58 AM
Can you use these plugs with plate system wet kit?I understand it may not be optimal but would there be any negative effects?

CAT3
06-07-2006, 04:35 AM
As long as you run a step or two colder in relationship to your shot size yes, no problem.

ATVracr
06-07-2006, 06:40 AM
I use iridiums, besides being exspensive they work great

02 Pewter LS1
06-09-2006, 12:53 PM
I run the TR6IX and really like them Blacktransam turned me onto them. :)

BadAssFast
06-09-2006, 04:20 PM
I hate to say it but I had a real hard time getting a set of TR6IX to do as well as plain old TR6 plugs...ugh.

cantdrv65
06-09-2006, 04:35 PM
I use the TR6IX also. Great plug.

Z28XTC
06-09-2006, 11:38 PM
These are TR55IX any good?

cantdrv65
06-10-2006, 07:00 AM
These are TR55IX any good?

The TR55IX are great plugs NA, but they are stock heat range and large gap. You should step down at least one heat range and close the gap some on the funny stuff.

blacktransam
06-10-2006, 08:59 AM
I run the TR6IX and really like them Blacktransam turned me onto them. :)

whos that guy..

i love my irridiums.. change my plugs at 20k miles if i want to..

Mike

Airwolf
06-10-2006, 09:21 PM
I run the TR6IX and really like them Blacktransam turned me onto them. :)

What are you doing on this site? i thought you were only on interested in paintball!!! :jest:

FAST FREDDY
06-11-2006, 12:35 AM
iridiums + nitrous = melted electrode and holed piston. been there done that with my nitrous injected drag bike. do yourself a favor and run spark plugs with thick electrodes when sprayin

cantdrv65
06-11-2006, 01:03 AM
iridiums + nitrous = melted electrode and holed piston. been there done that with my nitrous injected drag bike. do yourself a favor and run spark plugs with thick electrodes when sprayin

Sounds like your plugs were too hot for your application, that along with a possible lack of fuel. With an iridium plug which has less surface area on the tip, you may even have to go one step colder than a normal plug on the big shots....

FAST FREDDY
06-11-2006, 11:45 AM
no lack of fuel as the bikes a/f ratio was dialed in on a motorcycle chassis dyno (dynojet 250). i run a power commander 3r, for bikes this is like ls1 edit for cars. as far as the heat range goes the plugs were stock heat range and the timing was left stock as well. gas was 100 octane unleaded race gas. the pistons were forged. the plugs electrode melted and then piston got a hole in it the size of a dime. even if the plug was 1-2 steps colder heat range i think this problem would have occured. i was doin 178 mph on GPS when this happened. got some oil on my rear tire and it was a wonder i didn't wreck. anyway, i run the old skool plugs with the thicker electrode now. i had my motor rebuilt with JE forged pistons and jacked my compression ratio up from 11.3:1 to 12.5:1. i backed my nitrous down from a 40 horse shot to a 35 horse shot. i run 100 octane full time now and when i spray now i run 110 octane leaded. oh yea, the bike is a year 2001 honda CBR-929

Airwolf
06-11-2006, 01:52 PM
WOW, that had to be HOT HOT HOT!!!!!
The melting point of Iridium is over 4400 degrees (4435) and copper is a little over 2400 degrees (2446). Something seems a little off but not sure what... Either way copper would have given up the ghost much faster.

FYI, on the Denso Iridium plugs, the electrode is about the same size as a copper electrode on standard plugs, not small like on a platinum plug, which is known to hold heat too much for nitrous applications.

FAST FREDDY
06-11-2006, 04:07 PM
WOW, that had to be HOT HOT HOT!!!!!
The melting point of Iridium is over 4400 degrees (4435) and copper is a little over 2400 degrees (2446). Something seems a little off but not sure what... Either way copper would have given up the ghost much faster.

FYI, on the Denso Iridium plugs, the electrode is about the same size as a copper electrode on standard plugs, not small like on a platinum plug, which is known to hold heat too much for nitrous applications.


i am not sure how iridium plugs are built for cars. in other words how thin or thick the electrodes are? i run ngk TR6's in my camaro. but in motorcycles the iridium plugs electrodes are literally like 4x thinner in diamater than non-iridium plugs. :shocked:

Airwolf
06-11-2006, 06:01 PM
Another good point on the size as well as how they are made.
The Denso "look" to have the same size tip as my TR6's had. I did not actually get the calibers out and measure but the tip was large. The larger (I'll call it amount of Iridium) tips in the Denso may also be why they are more expensive then the other Iridium plugs out there.

I have been running them for over a year and they still look new and have had no trouble on the spray. The only advantage I personally saw over the TR6 was a smoother idle. The TR6 worked fine for me also.

cantdrv65
06-11-2006, 09:10 PM
You cant use a stock heat range plug with that much spray in relation to NA power thats is exactly why you melted holes in the pistons forged or not. The tip protrudes too far on a stock heat range plug and acts like a freaking glow plug especially with N2O....it got hot...VERY HOT. :)

The advantage of Iridium is a sligthly smoother idle and you never have to change them! :)

blacktransam
06-13-2006, 07:20 AM
iridiums + nitrous = melted electrode and holed piston. been there done that with my nitrous injected drag bike. do yourself a favor and run spark plugs with thick electrodes when sprayin

that makes no sense.. a heat range is a heat range.. wether it be copper plaitnum or irridium.. platinims just have a low melting point.. irridiums.. have a higher Melting point and a smaller tip making them harder to foul and great for BIG tune ups with lots of fuel..

also the power commander 3R suxass.. i had it on the GSXR1000 when we tried to spray it.. fuck that thing .. ended up with a yoshi box and actually flashing the ecu..

Mike

BadAssFast
06-13-2006, 08:05 AM
that makes no sense.. a heat range is a heat range.. wether it be copper plaitnum or irridium.. platinims just have a low melting point.. irridiums.. have a higher Melting point and a smaller tip making them harder to foul and great for BIG tune ups with lots of fuel..

also the power commander 3R suxass.. i had it on the GSXR1000 when we tried to spray it.. fuck that thing .. ended up with a yoshi box and actually flashing the ecu..

Mike
Seems like it on the surface. There are many more reasons that a plug design within a heat range may or may not work with a particular head, compression induction method etc.