Tommy Posted November 6, 2014 Report Posted November 6, 2014 Hi everyone! Just a simple question! How many EGT probes and where are they located on J's IO360 engine? Thanks! 1 Quote
Awqward Posted November 6, 2014 Report Posted November 6, 2014 I think the standard from the factory was on the cylinder #3 exhaust header (likewise the CHT probe on #3 cylinder)...presumably because this cylinder typically runs hotter than the other three....but I'm sure most will agree that you need one on each exhaust header...ie an engine monitor... Quote
OR75 Posted November 6, 2014 Report Posted November 6, 2014 the egt probe are on the exhaust pipes. look for the brown color pipes as the heat discolor them. Or the one that would burn your hand if you touch then after you just shut down the engine If you have just one, it will be on the #3 (closest cylinder to the copilot seat) Quote
Tommy Posted November 7, 2014 Author Report Posted November 7, 2014 If it only has one does it mean I need to drill if I am fitting four EGT probes? Exactly how many EGT probes do you need? Quote
N201MKTurbo Posted November 7, 2014 Report Posted November 7, 2014 It is a four cylinder engine. You need four EGT probes and four CHT probes if you are putting in an engine analyzer. You will need to drill holes in the exhaust pipes for the new probes. Drill them all the same distance down and the same orientation. The CHTs work best in the thermowells, but you will need a spark plug ring for number 3. Quote
carusoam Posted November 7, 2014 Report Posted November 7, 2014 Most people in the know would like four... Ovations have seven EGTs... It's like having a window into each cylinder to keep an eye on all the important things... Keep in mind on an N registered plane, your mechanic would be overseeing your work and signing your logs. Best regards, -a- Quote
Awqward Posted November 7, 2014 Report Posted November 7, 2014 It is a four cylinder engine. You need four EGT probes and four CHT probes if you are putting in an engine analyzer. You will need to drill holes in the exhaust pipes for the new probes. Drill them all the same distance down and the same orientation. The CHTs work best in the thermowells, but you will need a spark plug ring for number 3.d Is it possible to put the factory CHT on a spark plug ring and have all four engine analyzer probes setup the same way? Otherwise you would never trust/believe #3 on your EDM Quote
Tommy Posted November 7, 2014 Author Report Posted November 7, 2014 You can use the adaptor gasket CHT probe to have both factory and JPI probes - it is mandatory for any certified aircraft with cowl flap to keep the factory CHT. Would that likely give false readings ?? Quote
Tommy Posted November 7, 2014 Author Report Posted November 7, 2014 How far down did you drill the EGT probe and what orientation, MKTurbo? Quote
neilpilot Posted November 7, 2014 Report Posted November 7, 2014 In my experience, the EGT probe requires a 3/16" hole. They should be positioned 4"-8" from the exhaust flange. Uniform placement is essential so the readings are comparable. You must place the thermocouple beyond the flame front. Since you are likely starting with a single factory probe, drill the other cylinder holes at approximately the same distance. Quote
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