Who are my spark plug reading experts for a 2nd opinon? Plug looks like it is possibly too hot to me for this combination or maybe 34* is a smidge too much timing. Unless I am missing it, I do not see a heat line on any of those ground electrodes. R44LTS6 plugs currently, stock heat range for a L31. Cylinders 1-3-5-7, left to right. 1 and 5 look like they may be getting a small amount of oil on them.
You must be registered for see images attach
I for one like the porcelain color, especially the fact that there is no 'peppering' of tiny bits of melted aluminum.
(Have personally seen this firsthand, especially when the overall setup goes lean for whatever reason during extended WOT.)
Hopefully the oil showing at the end of the threaded section of the #5 plug subsides as all the engine bits continue to develop a
good working relationship between each other. The other 3 look excellent, and what I've come to expect from an engine that spends
the majority of it's time in closed loop stoich operation.
****
I watched your video, and the fuel trims look excellent. I'm assuming no misfire counts and you mentioned no KS counts either?
EDIT: You mentioned no KS installed, my bad.
SBCs are such a pleasure to drive when they are in this kind of condition & tune. Look forward to the next time the plugs come
out, for they are the closest to the action and tell us the most. Between the state of the plugs plus the overall stats kept by the
computer we can get a really good feel for the overall health & efficiency of the engine.
Looking good!
Last edited: