EGT probe install tips?
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From: CO
Originally Posted by 1stGenCRXer
You want to have the probe between 3 and 6 inches from the valve for your best readings. A bung would be a good idea on a tubular manifold as well.
Also, nearly all shared plenum hondas have an air bias problem on cylinder 3, NA or forced, so that would be the best cylinder to monitor if you can't monitor them all.
For the record, I've used EGT's racing 2 strokes [which are far more sensitive to improper A/F ratios than even the most high strung turbo engine] for the better part of a decade.
Also, nearly all shared plenum hondas have an air bias problem on cylinder 3, NA or forced, so that would be the best cylinder to monitor if you can't monitor them all.
For the record, I've used EGT's racing 2 strokes [which are far more sensitive to improper A/F ratios than even the most high strung turbo engine] for the better part of a decade.
h:Why would a bung be more beneficial if the bolt adapter is properly sealed? I can see where it may cause problems, but is it really that bad?
I went with the Greddy electronic EGT.
GWAKS- Tech Geekifier
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From: Hampton, VA
Having a bung in there would just make the whole thing more secure against vibration. Depending on the size and weight of the probe, it may be a non-issue. Personally, I would probably fabricate or buy a bung the size I was looking for just so I had the piece of mind that it would be more than strong enough to hold up to street use, but I admittedly can get overly paranoid about street survivability.
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I'd feel a bit weird just tapping a hole into a tubular manifold as well. There's just not much material there. Honda sees fit to weld on bungs for O2 sensor(s), I would do the same for an EGT.
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From: Michigan
I agree, a tubular manifold just won't give you the thread-depth you need for a taper thread fitting to seal properly. Definitely tig it on, just make sure you use a stainless fitting if the manifold is stainless, and stainless alloy welding rod.
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From: CO
I just happen to have a SS rod left over from another project I did so I can use that. I just hope the inner diameter is correct for this. How deep should the probe go into the manifold?
GWAKS- Tech Geekifier
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From: Hampton, VA
The tip of the probe should be centered in the runner's diameter.
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