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CHTs and liquid cooled engine

jcaplins

Well Known Member
I would like to re-ask a question about ring terminal spark plug temp probes for a different purpose. Originally asked here:
http://www.vansairforce.com/community/showthread.php?t=157048


Would these spark plug temp probes installed on all 6 spark plugs provide any useful data? I would only be concerned with the delta between each.
If each cylinder is not getting the same air/fuel mix would we see a delta on these probes?

If the answer is no, then this experiment is most likely dead. :(
If yes, then could the delta data be used to trim the fuel for each cylinder? (Which seems like it will require upgrading to dual EM5 ECU, which may be cost prohibitive at this point.)

The EZ30d only has one exhaust port per side, so the only EGT and AFR I get is left and right. I see no other way to see what each cylinder is doing.
 
No

You cannot use the CHT for F/A ratio tuning at all.

You could but you will soon discover why it is a bad idea ;)
 
You could but you will soon discover why it is a bad idea ;)

I'll take your word for it because I do believe the temps will stabilize to the coolant temp.

If you'd care to expand on what I would see leading up to "oh ****, that was a bad idea!", I'm all ears.

Thanks.
 
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