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FJR Motorcycle Forums
Technical & Mechanical Problems
Header temps,... any diagnostic value???
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<blockquote data-quote="ionbeam" data-source="post: 238037" data-attributes="member: 277"><p>Checking header temps is a good way to tell the <em>general conditions</em> of things. Heck, prop driven aircraft have thermocouples (TCs) on each exhaust port and they are used to assist in making carb adjustments with altitude changes.</p><p></p><p>The FJR has a balancer tube connecting cyls #2 & 3 so they share some flow. This is a Radman question here – are the header pipes double or single wall? And finally, when at idle the Air Injection system is actively putting air into the exhaust headers for a secondary HC burn. All these things can add up to produce erroneous readings. To make the readings more meaningful the AI relay should be disabled and the readings taken right at the cylinder head/ header junction.</p><p></p><p>My brand H V-4 had a pair of -- ahem, less than reliable spark control units so I regularly used the header temps as a diagnostic tool :glare:</p></blockquote><p></p>
[QUOTE="ionbeam, post: 238037, member: 277"] Checking header temps is a good way to tell the [I]general conditions[/I] of things. Heck, prop driven aircraft have thermocouples (TCs) on each exhaust port and they are used to assist in making carb adjustments with altitude changes. The FJR has a balancer tube connecting cyls #2 & 3 so they share some flow. This is a Radman question here – are the header pipes double or single wall? And finally, when at idle the Air Injection system is actively putting air into the exhaust headers for a secondary HC burn. All these things can add up to produce erroneous readings. To make the readings more meaningful the AI relay should be disabled and the readings taken right at the cylinder head/ header junction. My brand H V-4 had a pair of -- ahem, less than reliable spark control units so I regularly used the header temps as a diagnostic tool :glare: [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Header temps,... any diagnostic value???
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