Best place to mount EGT probe on headers?, Updated- Now weber tuning topic Options

[tornik550]

Where is the best place to mount a EGT probe on 4-1 headers? I have triad headers with a triad muffler.

[nathansnathan]

After all that messing around with egt probes, I busted out a cheap infrared thermometer gun thing.

The bungs were a good target but if you can point it somewhere remotely consistent on all 4, somewhere near the stubs, you may find it enlightening.

It's tricky because with the probes, the response is instantaneous, but with the infrared gun you need to rev it a bit once you make an adjustment for the change to show up. You would be looking for them to all be about the same, to make sure they are on the same side of the stoichiometric curve. It will tell you if they're balanced, too. Either side working harder will be hotter. It seems to work well to set the air correction screws, too, since mixture can compensate to even them out, but might make 1 leaner.

I used to use a Gunsen Color Tune, but I think the infrared thermometer works better (and no chance of stripping out the threads in the head). Not as good as probes or even class K thermocoupler ring terminals on the bolts, but way better than just a snail.