Quick plug question
 

I was trying to find this last night by searching through old posts but had no luck. I thought i saw a list of mods and then a recommended spark plug degree. The mods i've done are msd coils, CAI, and exhaust. Should i go a degree colder? Or should i just leave them. Another thing is that here in edmonton it's hard to find gas over 91 octane. What type of octane does everyone usually put? I've had 92 once at a mowhawk station. And i was on the NGK site and one degree colder of a plug for my car you guys recommend the TR55 so i looked that up on the site and it brought up a list of applications. THe 92 and 93 ssei call for these plugs, is that because of the smaller pulley on the s/c? And is there another part number for the TR55, or do i just go in and ask for it and they are all the same? THanks.

I'm not TOO sure, but with your mods now, you may not need cooler plugs, but I don't think they'd hurt. But if you had a smaller pulley now too, then I would get 1 degree cooler.

But I'll let someone else answer you since I may be wrong.

That would be my advice, too. When the pulley changes, go with it. But I ran the TR55's before the pulley and did just fine.

You're after the NGK V-Power TR55, and the stock number is 3951.