BriinumsBo
New member
im just not sure about the technology / physics - what can go wrong, etc.. can you guide me to some explanation?
furpo":2xkbxv0w said:The only reason you want to go to a colder running plug is because you are seeing signs of the plug overheating. This can be seen as 'chalking' around the electrode.
Roger
Hotrodhendrix":zt89ekiu said:Ok so what is suggested for a decently upgraded alltrac? It should be about 400 bhp around 18-20psi... It will stay around 12psi for normal driving more than likely. I dont mind changing them often sence it wont be driven very much.
Also I have nology hot wires. I know I know im going to try them. I had purchased them before reading up on them. If they cause a problem I have an extra set some where in the garage. Do these need a specific kind of plug?
BriinumsBo":lsaauo8m said:definitely go grade 7!. for 400hp i guess you should even need grade8. Come to Latvia, i have ngk iridiums 8, bring some grade7 with you, and trade is done
BriinumsBo":26b3gxer said:hello there!
I`ve been driving around for a year with NGK Iridium grade 8 and chose to switch. My friend needed grade8 (on his 400hp S13) so we just swapped. He thought he had grade 7, but on the plug the only number is 6 (smth like BKR6E or similar).
I`m not sure, maybe it is worse than it was before.
But what I did notice (what I really knew I had to check) is that AFR gauge now reads different. Though its narrow band, when I go WOT, its different, much more rich!! does that mean that it burns less? I did short TE1 and E1, so maybe that is the reason, i drove it only some 15minutes. Since there is only one way for oxygen to escape, spark plugs shouldnt change air:fuel ratio that goes into exhaust?