Originally Posted by maddog9

I just got a used .21 Mito 4 and was running Ohio indoors with cold temperatures (33F) due to having to vent the track. I had a C6TGC plug go bad after 15 minutes of run time. I am not sure if this was due to the cold temps or not, but would the newer C5TGN plug be better for cold temps and will there be any type of tuning I will have to do? Also, side note due to temperature inside we had engine head temps coming off the track at 150F after 25-30 minute mains.

Originally Posted by timjs

150? Where and how are you temping the engine? 150 is way too low if that's true. Although the engine would be running absolutely pig rich to achieve that, even in cold windy ambients.
If it's correct, wrap the head next time. Minimum temp 200f. Maximum temp isn't so important.

Originally Posted by Jerm13

With an air temp of 35*, 150 isn't as bad as you think....As long as the motor was running good with smoke, it should have been ok.
Now adding a layer of foil tape to the bottom 2-3 fins would help out in bringing temps up, that cold of weather you wouldn't see much higher than 200 anyway on a properly tuned motor. This is why you don't tune "with head temps alone."


And putting a hotter plug in probably would have helped and lasted a lot longer..

Originally Posted by timjs

150? Where and how are you temping the engine? 150 is way too low if that's true. Although the engine would be running absolutely pig rich to achieve that, even in cold windy ambients.
If it's correct, wrap the head next time. Minimum temp 200f. Maximum temp isn't so important.

Originally Posted by Jerm13

With an air temp of 35*, 150 isn't as bad as you think....As long as the motor was running good with smoke, it should have been ok.
Now adding a layer of foil tape to the bottom 2-3 fins would help out in bringing temps up, that cold of weather you wouldn't see much higher than 200 anyway on a properly tuned motor. This is why you don't tune "with head temps alone."


And putting a hotter plug in probably would have helped and lasted a lot longer..

Originally Posted by timjs

I don't tune to temps. I always advise against it. But 150f is too cold, regardless of ambient temps.

Originally Posted by maddog9

Back to the question will the newer style plug help make the plugs last longer in extreme conditions like that?

Originally Posted by maddog9

Motor was running really good, smoke and temping right of the plug and next to the plug on the button. Will have to try foil next time, but had no issue with power or the car whining in mid air or any of the usual signs. Back to the question will the newer style plug help make the plugs last longer in extreme conditions like that?

Originally Posted by 1/8 IC Fan

So the other day, local racer running a P3SX had his rod Fail...(one of my favorite Novas, so simple)..
felt bad for the guy - he is a young racer early 20's trying to have fun and a real good kid, helps and volunteers at the track.

So a buddy and I get to brain storming, I had P5XLT parts in the box, as i was still waiting for new bearings...

So we took the Crank, new PSR, Turbo headbutton and backing plate from my P5 and Slapped them in his P3XS! Ran in the motor installed in the car on the starter box for two tanks and finished it on the track (no one else was running, so we took a sunday drive, lol).

Needless to say, after we took it apart, inspected it, sealed and reassembled, he has himself a stealth little P5XLT. He is so happy and you can tell he is glad to be up and running again.

- New Plug and Button Head O-ring were installed after the breakin.

Pics to come...

Originally Posted by keithw11

has anybody tried the adam drake novarossi

Originally Posted by TZ

Yea, I love it.
I was gonna pick up another one, but novarossidirect doesn't show them listed anymore.
wonder if nova is gonna rebadge them or what?

Originally Posted by TZ

my werks didnt last 3 gallons before the bottom of case split