does anyone know what kind of spark plug i should use on my scion tc turbo. some people that i've talked to said use the ngk irdium ix or denso ik20. which one do you think is better to use and would not foul out my car.

 

7lbs or less of boost denso ik22, 8 to around 12 psi denso ik24

 

IK24's here.

 

What should I use for a 65/75 shot of nitrous? I want to go copper but I really dont know what numbers. I know 1 step colder should be good but from what manufacturer? Anyone got any part numbers? Thanks!

 

Nevermind, found them! NGK's BKR7E-11. Thats one step colder standard plugs for my nitrous setup. Go with the Iridiums for your turbo! Should be BKR7EIX-11 I think...

 

Do these stock plugs look fine? Based on NGK's reading chart they seem to be ok.

 

*LOL* no they are far from ok. Your running VERY VERY rich.

 

But Im basically stock lol. Its my fuel nozzle on my wet kit then? Should I up the nitrous? lol.

 

Oh wait. These are my original plugs still. I used to have I/H/E so Im sure I was running rich then. Now I have stock intake, no header, pulley, and exhaust plus the nitrous. I'll check my plugs after a few runs tomorrow.