Upgraded ECU not suited to higher altitudes? - MVAgusta.net
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post #1 of 38 (permalink) Old 07-08-2013, 06:00 AM Thread Starter
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Question Upgraded ECU not suited to higher altitudes?

When I bought my 1090RR I had the Arrow Thunder system fitted by the dealer. It was supposed to be supplied with the upgraded ECU. This was April, I'm still waiting for the ECU. Apparently, it is not suited to the altitude I live at, only some 5500 ft AMSL. High, I know, but still. Anyone ever heard of this?
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post #2 of 38 (permalink) Old 07-08-2013, 06:45 AM
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No, but it is very possible. Welcome to the forum mate.

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post #3 of 38 (permalink) Old 07-08-2013, 06:59 AM Thread Starter
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Much appreciated. I'll see what the dealer/factory come up with.
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post #4 of 38 (permalink) Old 07-08-2013, 03:53 PM
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Uhmmm...the air pressure sensor tells the ECM your altitude (lower pressures at higher altitudes) and it compensates accordingly. The beauty of electronic fuel injection over carburetor jets when climbing mountain passes (or Pikes Peak).

So that ain't it.

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post #5 of 38 (permalink) Old 07-09-2013, 03:28 PM Thread Starter
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Thanks esq'z me. I suppose the only potential problem would be if the fuel maps or dosing system (injectors) could not compensate but that seems highly unlikely. I'm awaiting response from the dealer and factory, will let you all know what they said.
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post #6 of 38 (permalink) Old 07-09-2013, 11:12 PM
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Originally Posted by dupreezj3 View Post
Thanks esq'z me. I suppose the only potential problem would be if the fuel maps or dosing system (injectors) could not compensate but that seems highly unlikely. I'm awaiting response from the dealer and factory, will let you all know what they said.
Shouldn't be a problem with the injectors because they'd be delivering less fuel at altitude. Curious to see what you find out.

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post #7 of 38 (permalink) Old 07-10-2013, 01:46 AM
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The only way a base map cold be unsuited to high altitude is if it was written with no compensation or offset tables which in this day and age is extremely unlikely.

In the base mapping there will be a number of offsets for stuff such as temp, altitude, pressure etc and they will manipulate the base fuel tables accordingly to stop the engine from running rich or lean due to atmospherics.

In essence I'm not sure what you've been told is entirely true or correct.
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post #8 of 38 (permalink) Old 07-10-2013, 02:01 AM
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At the moment I'm riding in the Alps. Been up to nearly that altitude and could not feel any problem on my engine. 13 RR with MV Corse race kit (decatted Headers and ECU).
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post #9 of 38 (permalink) Old 07-10-2013, 02:08 AM Thread Starter
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Quote:
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The only way a base map cold be unsuited to high altitude is if it was written with no compensation or offset tables which in this day and age is extremely unlikely.

In the base mapping there will be a number of offsets for stuff such as temp, altitude, pressure etc and they will manipulate the base fuel tables accordingly to stop the engine from running rich or lean due to atmospherics.

In essence I'm not sure what you've been told is entirely true or correct.
It didn't quite make sense to me either. Anyway, they said it would be resolved by the end of next week, so we'll see. Thanks for the information.
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post #10 of 38 (permalink) Old 07-10-2013, 03:04 AM
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Damn, they forgot to tell me!

I wish I had known that when I purchased the same exhaust system for my 1090RR, MY2010. I'd have not screamed up to Big Bear lake on Sr-38 over Onyx Summit elevation 8,334 ft passing a bunch of cars with ease, or eclipsed Emory Pass at well over the ton on HY-152 in southern New Mexico, elevation 8,210 ft. I'd have been more docile. Who'd a known my bike was not supposed to do that?

This bike has been up and down every high road in the mountains in SoCal, and has shown no signs of altitude sickness. With these bikes being born in Verese, IT, about three hours south of Stelvio Pass, elevation, 9,010 ft, I'm hard pressed to believe the information you have received is valid.

Best wishes on getting the race ECU fitted and getting out enjoying that new exhaust system. It is a hoot!

Ciao,
Dick
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