1jz constant miss

[1JZ~lux]

The number is for the temp the plug can handle isn't it? Is a higher number for more temp or less?

Sorry for the noob question.

[Endless]

The higher the number the colder the plug.

I had some bkr7e's myself in my 1j and ended up having to switch them back to bkr6e as i don't drive the car too much.

[Pure_In_Sanity]

I'm running the bkr7e's with pretty low boost, will keep this in mind if i see any problems.
Glad she's fixed

[oldcorollas]

The number is for the temp the plug can handle isn't it? Is a higher number for more temp or less?

Sorry for the noob question.

just to clarify (beyond doubt )

the higher the NGK number, the faster it can conduct heat to the head.

that means if engine is running cold (offboost etc), then a higher number will loose too much heat from plug tip to the cooling system.

if engine is running hot (ie, high boost), then a low number will not be able to conduct heat away from the tip fast enough, and could lead to electrode damage.

although nerdy.. think of it as a "heat conduction number".. or as a very rough guide.. th emore aggressive the engine, the higher the number... but stock is usually 5 or 6, and modified is usually 6 or 7... an 8 plug is pretty "cold", and is prolly terrible for day to day duties (but maybe ok in drag/race/WOT all the time motor)

[1JZ~lux]

You must spread some Reputation around before giving it to oldcorollas again.

Thanks Endless and oldcorollas. That's given me something to think about when I service the Lux after getting it back on the road.