Methanol Plug Reading
Posted: Fri Sep 07, 2012 2:55 pm
Hi,
When reading spark plugs when using methanol you don't go by the color of the porcelain you go by the heat line going up the threads.
As I recall "perfect" is 3 threads up.
The problem I'm having is that the plugs I've been using all along, NGK R5672A-8's don't seem to have the same gold colored irritation on them and the heat line isn't showing up.
No matter how rich or lean I've run it it's not showing color on the threads.
I've even tried wire brushing the threads in an attempt to remove whatever coating might be on there so I could get a reading but no love.
I'm using a "130" Enderle pill which is what I've always used so I know I'm close but, again, no heat line.
I've tried a 125 and a 135 just to see if something would show up on the threads but nothing.
I also have an EGT system but that only works if you're already pretty close to your fuel tune.
You can be overly rich and the EGT will read high because the fuel is burning in the tube where the EGT probe is.
This is a NA application.
Any thoughts?
Maybe a different brand or type of plug for tuning?
I'm sure Dave Kohler could advise if he's not still too mad at me.
Thanks,
Wayne
When reading spark plugs when using methanol you don't go by the color of the porcelain you go by the heat line going up the threads.
As I recall "perfect" is 3 threads up.
The problem I'm having is that the plugs I've been using all along, NGK R5672A-8's don't seem to have the same gold colored irritation on them and the heat line isn't showing up.
No matter how rich or lean I've run it it's not showing color on the threads.
I've even tried wire brushing the threads in an attempt to remove whatever coating might be on there so I could get a reading but no love.
I'm using a "130" Enderle pill which is what I've always used so I know I'm close but, again, no heat line.
I've tried a 125 and a 135 just to see if something would show up on the threads but nothing.
I also have an EGT system but that only works if you're already pretty close to your fuel tune.
You can be overly rich and the EGT will read high because the fuel is burning in the tube where the EGT probe is.
This is a NA application.
Any thoughts?
Maybe a different brand or type of plug for tuning?
I'm sure Dave Kohler could advise if he's not still too mad at me.
Thanks,
Wayne