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Buell Forum » Knowledge Vault (tech, parts, apparel, & accessories topics) » Engine » Exhaust: Headers, Muffler, Gaskets, Supports » Archive through July 28, 2007 » Header/Engine Temperatures « Previous Next »

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Jandj_davis
Posted on Friday, April 27, 2007 - 11:51 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I am planning on getting an infrared non-contact thermometer, and I want to make sure I have enough temp range to cover whatever I amy be measuring. I know there was some discussion of head temps during the Right Side Scoop introductions, but looking for anything with right side scoop in the message body is like slowly strangling yourself. So, if anyone has measure the temp of their headers/muffler/engine/rotors/etc. I would appreciate some numbers. The thermometer I am looking at goes up to 480 *F, while the next step up in cost covers up to 520 *F, then the expensive one covers up to 1100*F. I don't want to get the expensive one if I don't have to (naturally), so if the cheap one will cover it, I will go that way. Thanks for the help.
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Sloppy
Posted on Thursday, May 03, 2007 - 04:15 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Be warned on the IR thermometers!

Unless you get an expensive model, they are calibrated to a single emissivity (typically 0.95) which is "flat black". So unless you have flat black on what you're shooting with your thermometer, it will give a false reading (especially so if it's stainless - it's emissivity is ~ 0.15, or anything reflective!). Even the expensive ones require that you find the correct emissivity before you get an accurate reading.

I'd recommend you go with a thermocouple or temperature paint. They're available at Grainger.com.
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Blake
Posted on Thursday, May 03, 2007 - 05:59 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Or put a spot of flat black paint or other 0.95 emissivity paint on the area you wish to measure. : D Pretty sure the cast bits of the Buell engine and heads are all around that same emissivity. The header pipes though or any shiny bits would likely yield highly inaccurate results.
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Bombardier
Posted on Saturday, July 14, 2007 - 08:11 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Maybe so however even if the temp is not exactly accurate would not the differences of head/header temp measured on the same material remain the same?
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