1badd7

Just got a 93 rx7 with the to4s single turbo. Need help with a tune up!!! I have the power fc w/commander, blitz intercooler, twin power ignition, 850/1600 injectors, and 3mm w/port and polished engine.

I need help trying to find out what kind and # to use for the spark plugs. Do I use the same for all four??? I want to go with a colder plug.

I pulled the old ones out and two were ngk and the other two were champions??? Should I go with those, because he got them tuned with those and had no problems?

Any input would help. Thanks you!!!!!!

wonder1and

when I had that setup I think the best way to go... (kinda expensive) is w/ 9's in the leading and 11-11.5 in the trailing... just depends... check w/ your tuner if you have one and see what they say.

rx7racer11

i heard you should run 9's all the way around..

Badog

Use platinum 9's with a copper crush washer. That washer is worth half a heat range. If they toast out too quickly, go colder.