?PowercommanderIII

[Mr.Slippy]

I have a PC3 in my zed and was wondering does the pc adjust for elevation changes? or will i have to get it re-dynoed

[SilverBullet]

No it does not automatically do that. I take it you have two different residences at two extremely different altitudes?

[Mr.Slippy]

Originally Posted by SilverBullet

No it does not automatically do that. I take it you have two different residences at two extremely different altitudes?

not extremely but decently.. forget the actual difference.. was living in MA and now living in TX, once i get my bike here im guessing i should get it retuned?

[SilverBullet]

Originally Posted by Mr.Slippy

not extremely but decently.. forget the actual difference.. was living in MA and now living in TX, once i get my bike here im guessing i should get it retuned?

yeah I would. That will be a decent difference.

[Lazarus]

Don't quote me on this, but doesn't the PCIII just piggyback to the factory ECU?

I am fairly sure that the stock ECU has an ability to determine altitude and adjust accordingly. If true, then the stock ECU will make the adjustment and the PCIII will then modify the stock unit's MAP as it always has. Therefore, the difference in altitude will have very little effect on performance. I guess you could argue that a marginal gain might be had by retuning the PCIII but it would not be worth the cost to all but the most serious riders.

HTH,

rick

[soc_monki]

actually, the factory ECU does not adjust to altitude changes. there MAY be a slight ability to due to the air sensor, but there are no O2 sensors in the exhaust which would be the indicator of a system that can adjust due to monitoring exhaust gas contents, such as cars do.

so if you want to get it re-tuned for optimal performance than do so by all means, but i dont think its very necessary. the bike will still run, and run well, so you should be able to ride it without retuning. then when you find a good shop go ahead and get it retuned. but the ECU wont do it for you!

[Lazarus]

I think there is an air pressure sensor that gives altitude info but I haven't definitively found a source for that particular info. Micro fiche part breakdowns for the Zed show several unidentified sensors in the mix.

You certainly don't need an O2 sensor to adjust for altitude.

I believe the Vulcan line up uses just an air pressure sensor to get the job done here in the States.

From Motorcycling USA: 2009 Kawasaki Vulcan 1700 Nomad

The Nomad's fuel injection system, like those in use on Kawasaki's Ninja® 650R and Vulcan 900 motorcycles, utilizes one sensor in place of the usual three for less complexity and weight. Beside the obvious FI advantages like improved fuel economy and automatically adjusting for altitude changes, the system also permits easy hands-off warm-up and idle speed control.

This implies 3 sensors in old systems like the 3 shown in the microfiche for the zed simplified to one in the newest systems.

I'll try to find an answer,

rick

[SilverBullet]

Originally Posted by Lazarus

Don't quote me on this, but doesn't the PCIII just piggyback to the factory ECU?

I am fairly sure that the stock ECU has an ability to determine altitude and adjust accordingly. If true, then the stock ECU will make the adjustment and the PCIII will then modify the stock unit's MAP as it always has. Therefore, the difference in altitude will have very little effect on performance. I guess you could argue that a marginal gain might be had by retuning the PCIII but it would not be worth the cost to all but the most serious riders.

HTH,

rick

It is a piggy back, but the PCIII if you have used one takes out or adds "parts" of fuel to a greater range than the ECU and that doesn't move in teh PCIII. I don't think it Add or subtracts it on top of what the ECU is adding or subtracting if that makes any sense.

Maybe contact Dynojet and ask them directly because I understand exactly what you mean, but am probably explaining it poorly.