MoncefA33

iTrader: (6)

What's up Maxima.org,

I searched.

But I'm going to be buying new spark plugs soon and I want to know whether I should go with a colder heat range inspite of me running an N/A application without nitrous. Would it benefit me more with running more aggressive timing maps? And is there any way to quantify this, by which I mean how much farther can I push my timing with a one step colder heat range?

And is two steps colder even worth considering here?

And does anyone have preferences with different brands? Denso and NGK are what I'm considering. I have an '01 DE-K running I/H/E/e-Manage Ultimate.

Thanks,

Moncef

jr schultz

2 step colder is overkill. I was told from the nitrous guys that one step colder won't hurt performance na. I got rid of my nitrous and still have my one step colder ngk's in. I doubt you'll benefit by getting more power. Are you just trying to play it more safe than sorry?

MoncefA33

iTrader: (6)

Not trying to play it "safe than sorry" necessarily.

But I wanna run more ignition timing advance and running a colder heat range would help with knock suppression.

505max94se

iTrader: (15)

You won't benefit from using a colder plug. A colder plug is used in higher hp applications to prevent pre-ignition, not to prevent detonation. Pre-ignition occurs when a point within the combustion chamber becomes so hot that it becomes a source of ignition (e.g., a spark plug ground strap). Detonation occurs when excessive heat and pressure in the combustion chamber cause the air/fuel mixture to autoignite. There are many things that can cause detonation. One of the causes is too much ignition timing advance.

MoncefA33

iTrader: (6)

Ahh I understand. Thanks for the insight!

Matt93SE

iTrader: (44)

Basically for an NA car you don't need it. at least not one with stock compression and heads. If you're really upping the performance, you might need to change plugs.. But even with my higher-compression engine with ported heads, I still run the same plugs as stock. Nissan did a pretty good job on designing the VQ. the rest of the car? meh. But that's a different dead horse...

throttlehappy46

Stock plugs are even a little cold for the VQ. I am running 12.7:1 and still am only using 7's now as a 'just in case'

MoncefA33

iTrader: (6)

Cool, thanks guys!