"Actually, under the plug is the closest "practical" spot on the head to take temperature measurements from".
Hello Scott I just finished reading a one year section of the Archives on the CHT subject, as well as Steve B's article on probe placement. It seems to me that even if the plug is the hottest spot, that since I run 4 Cylinder CHT, that if cyl 3 is 450 and cyl 4 is 375, that cyl 3 is hotter then cyl 4. It is obvious that cyl 4 is up front and should be cooler then cylinder 3. Cylinder 2 has the lowest temp and it is up front also. Cylinder 2 is lower then cylinder 4. The question is, If the difference is due to cylinder position, is it ok that cylinder 3 can reach 550 at WOT and lead the other cylinders by as much as 100 degrees. Tomorrow I will reinstall the 4 temp probes under the cylinder head stud bolts, run the engine and see what kind of temps I get. Does anyone think that my moving the probes that I will get more uniform temps? Orma Southfield, MI N110LR celebrating 20 years To the gathering or bust
