I'm looking for a race plug, si I change them quite a bit sometimes

 

Thats what i figured.
All we use is NGK's for our 406's but the LT1 is different.

 

NGK TR5 gapped at .043"

 

Autolite 104 gapped to 035. Cheap, and NAPA has them near me.

 

NGK Iridium IX the paper clip electrode

 

tr6. Best damn plug Ive used, and I have used alot. Ac Delco rapidfires, ac delco platinum, champion junk. NGKs are the best that work for me. I have a high compression motor though, 11.21:1.

 

so do I bout 14 something

 

11.2 is high?

You dont wanna know what mine is......on pumpgas.

David

 

You really should tell people up front that you are looking at 700 flywheel HP and 14:1 (or whatever it is) compression. It makes no sense for people to tell you they are running TR55's in relatively stock engines. Its just wasting their time.

 

NGK 5672A-8

N/A 13.68:1 comp

 

thats why I asked for Race plug, I wanted to see if anyone was running anything close to the 3924's. I realize now I didn't word the question like I should have

 

Bosch platinum.

 

Well could not get the AR103's to run/ idle they were fouling out no matter what I did to the tune.

Went with a little hotter plug and she fired up first time and idles fine.

Anyone know where to find a chart with heat ramges?

 

no but if you find it be sure to post it i think i need 1 step hotter myself, using 104's now and they keep fouling when cold

 

There is one sticked in the nitrous section but does not have what I was looking for