Glow plug #'s

[JOHNNYMAXXIMA]

I bought my engine for my T-Maxx used and the guy I bought it from gave me a bunch of glow plugs. I was looking at some of them tonight and they all had different numbers ranging from 5,6,7 and 8. What are the different #'s for?
Thanks.

[coolhandcountry]

I think they are the different heat ranges on the plugs. That was the way hpi was. I can't recall which was which. I think the higher number was a colder plug.

[squeeforever]

Yup, thats exactly right. What kind of engine is it and what kind of fuel are you gonna run?

[JOHNNYMAXXIMA]

It's an RB .28 and I am using Traxxas 33%.
Thanks.

[squeeforever]

I think a 6 might be about right.

[JOHNNYMAXXIMA]

So how would it be affected if I were to run the 5 plug? Notice any difference?
Thanks.

[squeeforever]

You might notice a difference. It would depend on if you run it lean or rich or ect... Chances are it would be more responsive.

[JOHNNYMAXXIMA]

Cool, thanks.