L
lecroy
Guest
Sorry I did not read any of the links, so my post may be a repeat.
For starts, I really only care about WOT and idle. There is no way to shut down my engine at WOT without doing some damage.
The spark plug is a memory device and it records the maximum temperature. So, say I make a 1/4 blast down the road and then drive it another 3/4 of a mile to get back home. The data from the 1/4 mile WOT blast is still recorded in the plug and will not be effected by our slowing down and returning home.
The key is to look at the heat line. The heat line can be seen by looking at the side of the plug. The threaded part will show a dark line as the heat moves towards the top of the plug. This line is very distinct. If your using the newer NGK D8EA plugs you can bring this line near 3 threads. I try to keep it under 1 1/2 threads. Real safe.
You could look at EGT. Hotter would seem to be leaner, but there are problems with this. For example, you could be so rich that unburned fuel it being burned in the exhaust. Looking at the EGTs you may think it is lean when it is really rich. Always start with the plugs and verify with EGT.
Just something else to add to the mix....
For starts, I really only care about WOT and idle. There is no way to shut down my engine at WOT without doing some damage.
The spark plug is a memory device and it records the maximum temperature. So, say I make a 1/4 blast down the road and then drive it another 3/4 of a mile to get back home. The data from the 1/4 mile WOT blast is still recorded in the plug and will not be effected by our slowing down and returning home.
The key is to look at the heat line. The heat line can be seen by looking at the side of the plug. The threaded part will show a dark line as the heat moves towards the top of the plug. This line is very distinct. If your using the newer NGK D8EA plugs you can bring this line near 3 threads. I try to keep it under 1 1/2 threads. Real safe.
You could look at EGT. Hotter would seem to be leaner, but there are problems with this. For example, you could be so rich that unburned fuel it being burned in the exhaust. Looking at the EGTs you may think it is lean when it is really rich. Always start with the plugs and verify with EGT.
Just something else to add to the mix....
