Power Vision Information Thread
Cruiser
Joined: Mar 2009
Posts: 228
Likes: 0
From: Texas
I don't know where the J1850 port is on a Sporty, but it's under the left side-cover on '07 and I believe the right side-cover on '09 and above FLH's. Your service manual will identify the location, but you could pose this question in the Sporty section giving your year-model and someone will undoubtedly report back an answer.
Thanks, I did not realize that this thread was in the Touring Bike section (Ijust searched for Power Vision and found this thread.). I found the data port under my left side cover near the battery. Maybe eventually we can get a general Power Vision section here on the forums like they have for some of the other tuners.
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Extreme HDF Member
Joined: Sep 2005
Posts: 11,615
Likes: 50
From: Baton Rouge, LA
KPA is just a unit of pressure. 100 kpa is the pressure of the atmosphere at sea level. What's being read in the software, and used as the x-axis for most tables, is an absolute pressure value. If the engine is in a vaccum condition, the value will be less than ambient pressure. If the engine is at WOT and there aren't any intake restrictions, the value should be the same as ambient pressure.
Quick example, 100kpa sea level pressure, engine is idling at 30kpa. The engine is pulling 70kpa vacuum below atmospheric, converted that's 20.6 inches of mercury, which is what you'd read on a vacuum gauge if it was attached to the engine.
A vacuum gauge is "gauge pressure", so it's referenced that ambient pressure always reads zero on the gauge.
Quick example, 100kpa sea level pressure, engine is idling at 30kpa. The engine is pulling 70kpa vacuum below atmospheric, converted that's 20.6 inches of mercury, which is what you'd read on a vacuum gauge if it was attached to the engine.
A vacuum gauge is "gauge pressure", so it's referenced that ambient pressure always reads zero on the gauge.
I'm used to reading vacuum in the old days and even have a boost gauge that shows vacuum in my car now, and have been watching TP for about a year now on the Harley. Thus, this KPA thing is something I'll need to get used to, and have been pairing KPA and TP on my PV gauge cluster since installing it to keep tabs on the relationship.
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Extreme HDF Member
Joined: Sep 2005
Posts: 11,615
Likes: 50
From: Baton Rouge, LA
Thanks, I did not realize that this thread was in the Touring Bike section (Ijust searched for Power Vision and found this thread.). I found the data port under my left side cover near the battery. Maybe eventually we can get a general Power Vision section here on the forums like they have for some of the other tuners.
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Extreme HDF Member
Joined: Sep 2005
Posts: 11,615
Likes: 50
From: Baton Rouge, LA
IAC Steps
In my original post I mentioned that I had altered IAC steps to reduce the high-idle spike at start-up. After a month running with lower IAC step values at all tempertures I've been getting sporadic odd idle behavior at start-up--like stumbling, vacillating between high (1200-1300) and low, etc. I set it back to stock values and early indication is that it is back to normal now. I'll post more as I test more, but be prepared to go back to stock if you start messing with the IAC Step table.
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Extreme HDF Member
Joined: Sep 2005
Posts: 11,615
Likes: 50
From: Baton Rouge, LA
Thanks, I did not realize that this thread was in the Touring Bike section (Ijust searched for Power Vision and found this thread.). I found the data port under my left side cover near the battery. Maybe eventually we can get a general Power Vision section here on the forums like they have for some of the other tuners.
Member
Joined: Jul 2009
Posts: 4,310
Likes: 1,079
I agree...and to be completely fair, there should be one for the other user-based flash tuner....SE Pro Super Tuner. No reason for TTS to be singled out for it's own sticky if you ask me.
Road Captain
Joined: Jun 2010
Posts: 609
Likes: 14
From: Mount Airy, MD
Yes, and that's such a big advantage over the PCV software. Oddly, the PCIII had a compare feature but the PCV didn't.
You just open a file, then click on "Load Compare" where you'll select the file to be compared. Once that's done, when you drag your mouse over a value it will show that value and the compared value in a small box near the cursor. If there is no difference the box won't appear. When finished click on "Close Compare" and it will close the compare file. It works great.
The Save Values feature is also handy. You can check the boxes next to any table, then click on File > Save Selected Values and it will save only those tables to a PVV file. You can then load another tune, select "Load All Values", select that PVV file, and it will load only those tables to that tune. Very convenient and well-thought-out.
You just open a file, then click on "Load Compare" where you'll select the file to be compared. Once that's done, when you drag your mouse over a value it will show that value and the compared value in a small box near the cursor. If there is no difference the box won't appear. When finished click on "Close Compare" and it will close the compare file. It works great.
The Save Values feature is also handy. You can check the boxes next to any table, then click on File > Save Selected Values and it will save only those tables to a PVV file. You can then load another tune, select "Load All Values", select that PVV file, and it will load only those tables to that tune. Very convenient and well-thought-out.
Road Warrior
Joined: Aug 2010
Posts: 1,268
Likes: 8
From: Detroit, the asshole of America
This dives into another topic... the barometer as mentioned in a weather report is corrected for sea level. Go up to Denver, you're only at ~84 kpa barometer, or somewhere around 25 inches of mercury. But, the weather stations are going to correct the reported barometer to a reference sea level value of 29.92 as "normal".
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Advanced
Joined: Mar 2011
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I spoke in too much of a generalization, 100 kpa is approximate. You're at sea level, and you've got "good air", especially this time of year. 101-102 kpa is an average barometer day near the gulf coast. I have data from other vehicles with baro as high as 104 or so when I was testing in Corpus Christi. There is also a bit of tolerance in the map sensor itself.
This dives into another topic... the barometer as mentioned in a weather report is corrected for sea level. Go up to Denver, you're only at ~84 kpa barometer, or somewhere around 25 inches of mercury. But, the weather stations are going to correct the reported barometer to a reference sea level value of 29.92 as "normal".
This dives into another topic... the barometer as mentioned in a weather report is corrected for sea level. Go up to Denver, you're only at ~84 kpa barometer, or somewhere around 25 inches of mercury. But, the weather stations are going to correct the reported barometer to a reference sea level value of 29.92 as "normal".
Feet_____(kPa) example
0_______101.33 New York, Vancouver, Washington
500______99.49 Dallas (435 feet), Detroit (585 feet)
1000_____97.63 Geneva (1230 feet), Kelowna (1129 feet)
1500_____95.91 Helena (1404 feet), Wichita (1290 feet),
2000_____94.19 Canberra (1886 feet), Las Vegas (2030 feet), Regina (1893 feet)
2500_____92.46
3000_____90.81 Red Deer (2968 feet)
3500_____89.15 Brasilia (3480 feet), Calgary (3750 feet)
4000_____87.49
4500_____85.91 Banff (4500 feet)
5000_____84.33 Albuquerque (4945 feet), Denver (5280 feet)
6000_____81.22 Colorado Springs (5890 feet)
7000_____78.19 Mexico City (~7200 feet)
8000_____75.22
9000_____72.40
10,000___69.64
15,000___57.16 La Paz (13,169 feet), Mauna Kea (~14,000 feet)
Thread Starter
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Extreme HDF Member
Joined: Sep 2005
Posts: 11,615
Likes: 50
From: Baton Rouge, LA
I spoke in too much of a generalization, 100 kpa is approximate. You're at sea level, and you've got "good air", especially this time of year. 101-102 kpa is an average barometer day near the gulf coast. I have data from other vehicles with baro as high as 104 or so when I was testing in Corpus Christi. There is also a bit of tolerance in the map sensor itself.
This dives into another topic... the barometer as mentioned in a weather report is corrected for sea level. Go up to Denver, you're only at ~84 kpa barometer, or somewhere around 25 inches of mercury. But, the weather stations are going to correct the reported barometer to a reference sea level value of 29.92 as "normal".
This dives into another topic... the barometer as mentioned in a weather report is corrected for sea level. Go up to Denver, you're only at ~84 kpa barometer, or somewhere around 25 inches of mercury. But, the weather stations are going to correct the reported barometer to a reference sea level value of 29.92 as "normal".
That makes sense, as I'm at 25' above sea level as I type this. I assume that if I want to determine atmospheric pressure at a given moment I can just turn the ignition on without starting the bike and look at the MAP gauge. So, with my small air-temp gauge all I need is a humidistat and wind-velocity gauge and I'll have a mini weather station on-board. A weather radar would be a nice addition to the next PV firmware, too, BTW. I'll need to ask DJ about that, as they've been responsive to such requests in the past.
Last edited by iclick; Mar 25, 2011 at 10:09 AM.