Ok so I had a NGK 7* temp plugs in my car and I think one fouled out so I am thinking of going colder. I have a LS4 with 150* of nitrous on it.
NGK br8es would be the next coldest would those work or stick to the 7's?





any thoughts?

 

you're not at the limit of the 7. 8 would be too cold.

What are you gapping them at? How much timing is being pulled?

 

Too much timing and the wrong #7 plugs to begin with. You should've at least had non-projected br7ef plugs in there.

Also, you did more than just "foul" out one of those plugs. I would do a compression test on the cylinder that the missing plug tip came out of.

The colder plug is actually a br8efs, #1049.

 

too much timing. what is your current timing?

Most people just can grasp the concept that its a base number adjusted by IAT/ECT and other things such as smoothing. IE, if PCM detects cold air, your gonna get timing added internally. Depends on how you shot the n20 in.

 

Timing is pulled 6* for my 150 shot . I am buying some new BR7EF's. Stock gap is .040 I had them gapped at .035. Did a compression test on all cylinders they are all good at 125 lbs. I'm going to toss the plugs in and but my exhaust back together. Ill let you know what happened

 

Make sure to throw some BR7EF's in it. Gap them at .032. What jetting do you have in it? How much timing is in it after you pull 6 degrees?

 

125 psi? My 8.1:1 compression GN motor had more psi than that.


How did you do your compression test?

 

That cylinder is hurt that you burnt the strap on. There is oil all over that plug. The rest of them are starting to round off the straps too.

 

Car is running really good put new o2's in and new plugs, but I keep getting emission 1 fuse blowing. Emission 1 fuse keeps blowing after about 30 seconds of running, replaced both o2's and still getting code. Any other thoughts? getting code p0443 p0030 p0053 I believe

 

I believe your front driver's O2 has a short to ground somewhere. Check the wiring.