spark plug question

[accordkid16]

i want to get a small 25 dry shot of nitrous when my car is on the road and i have a job, my question is will i have to get a colder pluger with a shot that small or will my bosch platinum be fine?

[deevergote]

I don't know of any kits that do 25... 50 is usually the smallest (i've seen 35...)

Anyway, see what the manufacturer of the kit says. Usually, colder plugs are required. It's really not a big deal.

[ON_N20]

On such a small shot like that, a standard heat range plug would probably work just fine, however its always a good idea with running nitrous to use one heat-range colder. Also NEVER run platinum plugs with nitrous oxide. Use either standard or Iridium plugs.

Ive been running a NOS brand wet nitrous kit on my car for over a year now, and I just use standard heat-range NGK Iridum IX plugs and have never had an issue. Of course also remember to use 91-93 octane fuel at a minimum, and dont forget to retard the ignition timing around 1.5 degrees, for every 50HP gain (shot). Good luck with the N2O!

[accordkid16]

whats wrong with platinum plugs and nitrous?

[ON_N20]

I don't know of any kits that do 25... 50 is usually the smallest (i've seen 35...)

Anyway, see what the manufacturer of the kit says. Usually, colder plugs are required. It's really not a big deal.

I believe Zex sells a dry kit that has a 25HP shot if I remember correctly. But most kits start at a 35HP shot and go up from there. My NOS brand nitrous kit came with 35, 50, and 75 HP jets . Shot size mainly depends on the manufacturer's preference.

But anyway again if were the OP, I would just go ahead and get a step-colder plug just to be on the safe side, and then you can always run a slightly higher shot later if on if you want, and still have a good safety margin. Keep in mind that if you DO run to high of a shot, with too hot of a plug, you can (and probably will) have detonation, which can quickly destroy a stock engine.

[ON_N20]

whats wrong with platinum plugs and nitrous?

In some cases the platinum tip can delaminate from the plug, due to the heat and pressures created by running nitrous. Obviously a small hunk of platinum flying around in the cylinder not good! Solid core platinum plugs MAY be ok, but as a general rule of thumb, you dont want to run platinum plugs with nitrous.

Iridium plugs dont seem to have the same issues that platinum plugs do (Ive been using Iridiums for a while now with nitrous at a 75 shot, and no issues to date).
And of course standard plugs work good with nitrous as well.