[redcloud]

Hey Versicolor,



What did you ever conclude with your burn condition? I am running down the same path as you I think where I installed the Brass Rod Modifcation, removed the resistors, added resistive plugs, and the plugs read lean. I have richened them up, and I too am approaching 3 turns, I think I am at 2.5 now?



I did start with 2 full turns and she was a bit sluggish, moved to 2.5 turns, and it is much improved, the balance between the color of the plugs is better, and I am starting to see slight indications of tan. Maybe three will be the magic number?



Just curious what your follow-up might be. One difference in my setup is the local shop did NOT have hte NGK plugs, but had the equivalent resistive style in a Champion Spark Plug.



I am running Stock/Standard Jets on my 79CX500C.

 

[redcloud]

thanks so much for the follow-up. I appreciate that you closed the loop for me. I think I am close and might adjust to 3 full turns out to see what happens. This sort of shows how the Brass Rod Mod can affect the burn. I wonder if repeated with an Aluminum Bar, if there would be a difference?

 

[redcloud]

I thought the same thing until I looked up the conductivity properties of Aluminum...check out the following link:



Materials Conductivity I was shocked at the percent difference between the two...Aluminum would appear to be more than twice as conductive.



I wonder if by using Brass we are doing ourselves a disservice...has anyone ever tried straight up Aluminum?...or copper for that matter!

 

[redcloud]

interesting. Considering the small length and diameter of the rod we are using it probably doesn't really matter what is used in this case. I don't know how you would even be able to tell the difference if you tried aluminum or copper. Maybe i'll throw some aluminum in there just for the heck of it.

you have a great point with regards to the short length required. I think if you had the bike tuned well, even coloring and carbs in sync with the brass in there, and then changed it up with some Aluminum rods of equal length, ride for a bit and then checked the plug color if there would be any difference.



Another way would be to start with new plugs, run brass, then swap out to a new set of plugs with aluminum, run an equal distance, route, etc and do a side-by-side photo to see if there is any difference in spark color.



curious for sure. let me know if you find anything out...I think some purrty annodized knittin' needles are going to take one for the team in the next couple of days