Well I lost some ceramic on #2 and #4 plugs and was told to go from my IT22s to IT24s. Well I have them and they are going in today. My question is, because they are so cold will I have problems? I have had the NGK BR7s in but did not like the misfire. Also what gap should I have them set at. I am running 19psi boost and will be running a 50 shot in the winter and a 75 shot in the summer.

 

holy ***** thats a lot of boost! (TTT)

 

Tommy, that is a lot of boost to run on the street. I melted (3) plugs as soon as the weather turned colder here in NY and my filter clogged up. I was running a 3 lb upper and a 4 lb lower with TR-6's, I switched to denso IT-22's and LOVE THEM. I also took off my upper for the winter months and currently are only running a 4 lb lower WITH NO MIS FIRES, AND IT RUNS GREAT. So I would say with the colder plug and all that boost, you will be fine and have no problems. I see your in NJ, you may want to richen up your tune for the colder months to be safe, take off a couple of lbs of boost and it'll give you a safe tune for the winter. Just a thought.

 

Tommy,

Let me just add my 2c.

That is a lot of boost!!!!!!! Where are you going man? Unless that motor is built from the bottom up, I would be afraid to smoke um.

 

He does have a built motor. SAP

 

I have mine setup for 20-23psi, but won't be able to make a pass until spring. We should have a month or so of cold weather when the track reopens. Tommy and I are on our quest for 10's.

 

10s =

 

Thanks for your concerns and information. I have had many plugs in the truck and would recommend all but the IT24s. They are way too cold. With just 200 miles on them, they are being replaced. I am going to put the IT20s in and have my street chip turned way back. Yes, I do have a built motor. Also have the larger fuel pumps that bumped my fuel pressure up. Will be doing some testing with the tune today to see if I am still running lean.

 

Tommy, have you run BR7's? with all that boost and squeeze, too.
I'd consider running something with a retracted gap. You are putting the nose of that plug pretty far out into the combustion chamber.

 

I have tried the NGK BR7s and did not like them. I may give the IT24s another try. #5 plug's insulator was cracked and covering the element. It looks as if it may have been defective as all the insulator is there.

Glad I am getting good at changing plugs.

 

I had some IT-24's that the insulator cracked earlier this year.

 

I would not run Denso's and NOS, not fully tested. Stick with the BR7's.....

 

Cracked insulators are a pretty good indication that there is some detonation happening, whether you hear it or not. When I installed the IT-20's in my truck, they looked pretty fragile.

The tiny center electrode and insulator didn't appear that they would take much abuse. I guess they use them in F-1, put they are probably retracted gap.

 

Well the IT24s are back in and will be doing some more testing. Have a smaller upper pulley that I will be trying. Should see more than 20psi boost! Will not be running nitrous on top of that yet. I am going to switch back to the stock upper for nitrous runs. I will only be running a 50 or 75 shot so I do not want to base my plug decision on that. No cage so I do not get many runs in. Does not look like I will be spraying until next year as Atco kicks you off after the first run in the 11s. Should be right there without nitrous.

 

Not possitive but I believe that NHRA sanctioned tracks lowered the time requirements for a cage to 11.49 a number of years back. Maybe you could write a nicely written letter and email it to the track to see if they'll consider allowing the change at your local track.

Hahahaha... I just realized that this original post is over 5 years old... Oh well.

Roach