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Buell Forum » Big, Bad & Dirty (Buell XB12X Ulysses Adventure Board) » BB&D Archives » Archive through October 17, 2006 » Fan Duty Cycle Observation « Previous Next »

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Teeps
Posted on Monday, October 02, 2006 - 09:32 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

An interesting observation with regard to the cooling fan:
Recently I installed a free flowing muffler on the Ulysses.
During my Sunday morning ride to the Rock Store; I noticed that the cooling fan does not run as soon as it did with the stock muffler. I made it from Torrance to Santa Monica (21 miles) before the fan came on, 18 miles were on the freeway @ 70 mph. At about 22 miles I cycled the Engine Stop Switch. The fan did not run again until I started climbing up Latigo Canyon Rd, another 15 miles. However, once the fan starts running it did not shut off on its own, I have to cycle the ESS to fool the ecm.
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Davo
Posted on Monday, October 02, 2006 - 10:03 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

By cycling the ignition switch you are running hotter, more often and longer. I have experimented with a fan trip circuit that will trip the fan on any time the engine is above 356 F and it stays on until the temp drops to 356 F which is never with my stock ECM and scoops.
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Teeps
Posted on Tuesday, October 03, 2006 - 08:59 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Interesting experiment Davo.

Do you have one big air scoop or two?

Have you checked the engine temperature after the fan has been running for a while?
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Davo
Posted on Wednesday, October 04, 2006 - 12:30 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Right now I am stock (both scoops) but there is a right side after market scoop in the mail as we speak! I am looking forward to some scoop testing!! If I remember right I was jumping the ET to ground with a 220 ohm resister. It worked so well that I am considering a fan trip switch for next summer unless I go in-line 4!

(Message edited by davo on October 04, 2006)
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Davo
Posted on Friday, October 06, 2006 - 07:55 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Teeps,
Sorry for not answering your question. My garage arrival temps with the stock equipment during the hot summer months was around 397F. Sometimes as much as 407F. I just received a CF right side scoop and I will do some arrival temps and make a report as soon as the rains stops and I can break away from work.
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