Originally Posted by wc3john
Why can I not use platinum plugs with nitrous?
According to an article I read some time ago it has something to do with the nitrous effect on the platinum spark plug coating and back then the ability to find the correct heat range in a platinum plug. They are also said to fire hotter and be less effective at transferring the spark than a copper core plug. Hotter is bad when running nitrous and you need all the ignition energy you can get to fire the mixture.
Nitrous Express also says this in their instructions:
Do not use platinum tipped spark plugs, the spark kernel is to small for
nitrous usage and cannot ignite the mixture at the cylinder pressures that nitrous creates.
You can read it here - Nitrous Express Instructions
Once you find the heat range you need using inexpensive plugs, switching to a fine tipped iridium plug may be beneficial. That's my plan for the SC installation and tuning.