Scrambler default open loop idle map? - Triumph Forum: Triumph Rat Motorcycle Forums
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post #1 of 9 (permalink) Old 10-11-2019, 02:30 PM Thread Starter
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Scrambler default open loop idle map?

If I eliminate the air injection and the oxygen sensors on an air cooled 2016 Scrambler and then "uncheck" those items using TuneECU, does the bike default back to an internal open loop map under idle and steady running conditions?

I'd like to make sure that unchecking those items doesn't just turn off the "code" light but leave the bike looking for the O2 sensor input at idle or running in some sort of "emergency" mode.

Best regards,
Rich
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post #2 of 9 (permalink) Old 10-11-2019, 04:12 PM
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You will need to follow the reset adaptation procedure after deleting and reprogramming. Plenty of instructions on doing that for the air cooled twins, just search the forum.

Jeff Hancock
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post #3 of 9 (permalink) Old 10-11-2019, 05:46 PM Thread Starter
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I'm good to go on the reset procedure. Not happy about idling for 20 minutes but I've got some serious fans we used for the racebikes in a former life.

Just wanted to make sure whatever map it defaults to for low rpm/steady state is something usable not just some "limp home" function!
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post #4 of 9 (permalink) Old 10-17-2019, 08:29 AM
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You won't come close to overheating. The reset procedure has you monitoring the oil temp and you only have to idle until you reach it. It may take 20 minutes, maybe less. But fans will just make it take longer.

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post #5 of 9 (permalink) Old 10-17-2019, 10:41 AM
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If you remove the O2 sensors your bike will revert to using the fueling maps for fueling in the areas of the map that the O2 sensors covered. If your Scrambler has a standard airbox and exhaust system, you shouldn't have too much trouble, but if you have made some mods, your engine may run too lean on a standard tune/map.

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post #6 of 9 (permalink) Old 10-17-2019, 03:30 PM Thread Starter
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Thank you both.

A) I didn't realize that the "reset procedure" was based on oil temperature. I thought it was time dependent!

B) This is an interim step until my pipe (Tec Tracker) arrives, and I get it mounted... ;-)

Once the pipe is installed I will figure out if I want to run it with the baffle in or out. Presumably with "baffle in" the stock map less air injection and O2 sensors will be OK.

If I decide to run the pipe without the baffle then I will go ahead and install the Breathe cover and remove the airbox baffle so I can match with one of the TTP maps.

Any foreseen problems with that plan?
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post #7 of 9 (permalink) Old 10-18-2019, 06:47 AM
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Once the O2 sensors have been removed, the reset adaption procedure is all about TPS calibration to the new tune. Idle the engine from cold until the TPS light comes on in TuneECU or TTP TuneLoader, which is usually between 63°-67° or roughly 20 minutes, do not touch the throttle during this time.

No problems with your plan, but Tracker "baffle in" will reduce torque & power right across the rev range. We used the Tracker system with the baffle out, but we did take out the existing baffle material and used Acousta-Fil baffle material to give a nice deep sound.

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post #8 of 9 (permalink) Old 10-18-2019, 07:41 PM Thread Starter
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Thank you for the clarification on the reset procedure.

I was suspicious that the Tracker would lose horsepower with the baffle in. I looked at the muffler volume compared with the two cross connected stock cans and thought... hmmm....

Reminds me of the Drag Specialties "turn out" pipes we used to put on Yamaha XS650 choppers. We never dared to tell the customers that the re-jetting procedure meant going three sizes leaner on the main jet and a smaller pilot to boot!

Thanks for the help!
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post #9 of 9 (permalink) Old 10-18-2019, 07:45 PM Thread Starter
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I should clarify that my rush to get the Tracker pipe on before the rest of the intake mods is because my wife will need anger management counseling if she has to ride with the high pipes more than a few more miles!
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