how important are colder plugs when running a NX 75 shot? I know these rob some serious HP when running NA.

 

tthey dont rob anything

 

I was told like 5-10HP NA for each step.

 

I run one step colder NA and I am not loosing that much power. Maybe 5, you wont even feel it.

 

I run BKR7ES plugs (2 steps colder) and run 14.6 in my auto N/A.

Some folks do think there is some HP loss but I haven't been able to measure any diff in my car in the 1/4.

 

what is the NGK part number for 1 step colder?

 

NGK bkr6e-11

 

well man just so you know, on your word I went out and bought these plugs so I could go to the track tomorrow, only to find out that these are the STOCK temp plugs :-/

 

try and gap them to .04 so that they are some what close to stock(.044) ....ps i have mine gapped to .038

 

are these the plugs you run? these are the same plugs I took out of my car. Have I been running 1 step colder all along?

 

i run the plugs listed above

 

That is incorrect. The stock heat range is 5. 6 is colder, 7 even colder etc. The part # for the stock VQ platinum plug is PFR5E-11. BKR6E-11 is the correct part # for the one step colder NGK coppers. I bought these for my brothers supercharged 2K1.

 

Im on a 75 shot wet and run stock copper plugs.... no problems what so ever...just make sure u run 93 octain

 

cool, I guess I have just been running 1 step colder plugs all along. Since I change my plugs out so often I usually keep them. I looked back through my old plugs and they were all these plugs.

 

anyone retard their timing when running colder plugs?