| Author |
Message |
    
Growl
| | Posted on Monday, August 04, 2008 - 12:21 am: | 
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Very interesting... |
Buelllightening
| | Posted on Monday, August 04, 2008 - 12:12 pm: |
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Sekaliagai how do you get the Byte addrees 0x204 to read on spywear |
Sekalilgai
| | Posted on Monday, August 04, 2008 - 12:17 pm: |
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I used Ecmspy, to retrieve the EPROM from the ECM, changed the bit and 're-flashing' the ECM. The current version will allow you to re-flash just the changed value and not the entire table. |
Buelllightening
| | Posted on Monday, August 04, 2008 - 12:37 pm: |
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So whe you retrieve the EPROM from the ECM whijch i have done what am i looking for to change |
Sekalilgai
| | Posted on Monday, August 04, 2008 - 02:47 pm: |
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Take a look at the EPROM contents at address 0x204
The description of its function can be found here. http://www.ecmspy.com/eeprom_directory.shtml
The value stored at this address from my stock ECM was 0x99 and I changed it to 0x98 and then wrote it back to the ECM. If you've not read the tuning guide, I'd highly recommend it...quite informative. I think you can also employ the 'Diagnostics' tab and check/uncheck the AMC option. I have not tried it but it looks like it sets the same bit....
(Message edited by sekalilgai on August 04, 2008) |
Buelllightening
| | Posted on Monday, August 04, 2008 - 03:32 pm: |
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Retrieved the ERPOM,go down L/H column to 200-accross to line 04,value 99 change that to 98 and burn the EPROM,what next/ |
Buelllightening
| | Posted on Monday, August 04, 2008 - 04:07 pm: |
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Looks like you change the actuator operating points in 208? |
Sekalilgai
| | Posted on Monday, August 04, 2008 - 10:52 pm: |
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yes 0x208 sets the three different regions. I reduced my idle region so that it didn't immediately cycle the servo on initial roll-on. Not sure if it makes that much difference. I cut my idle threshold (region 1) by half. You can certainly hear the transition. I spend interstate speeds at 3.5k for the most part, by default my region 2 was around 3.3k so that was ok as it kept the servo from cycling on-off while at boring interstate speeds. I suspect that if you spend loads of time (miles) at the region threshold, it might be a good idea to shift it up or down a bit. But that is just my 2 cents.... I'd keep a backup to be safe  |
Buelllightening
| | Posted on Tuesday, August 05, 2008 - 09:22 am: |
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how do you change the regions in 0x208 cannot get a table to appear,or how do you change the lower end in region 1 |
Sekalilgai
| | Posted on Tuesday, August 05, 2008 - 10:29 am: |
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The table is 6 bytes starting at 0x208. Each byte defines a RPM threshold. If I understand the table correctly, the value is RPM/50 in that 0x01 = 50RPM and 0xFF = 12750RPM. So far the 'ear test' seems to validate it. What are your 'stock' values? I don't think they really need to be tweaked unless you're not happy after activating AMC. Have you ridden the bike after altering 0x204? I'd try that first before tweaking the regions. Good luck ... be careful!
(Message edited by sekalilgai on August 05, 2008) |
Buelllightening
| | Posted on Tuesday, August 05, 2008 - 11:02 am: |
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No i have not riden the bike yet so i will try it first,but i cannot get to read the values,when i click on0x0208 all i get is one no in the lower box thesame as when you click on 0x0204 to activate /deactivte the AMC.can you explain how you access the table |
Sekalilgai
| | Posted on Tuesday, August 05, 2008 - 01:57 pm: |
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Region 1 is defined by the values in 0x208 and 0x209. Region 2 is defined by the values in 0x20A and 0X20B and finally region 3 is defined in 0x20C and 0X20D. So each address give you one 8bit value that translates to RPM (by multiplying by 50). That is how the 'table' is stored. It is more like an array of six, byte-wide values than ...say an Excel-looking table. Sorry for the misunderstanding. Take another look at the ECMSPY page, it'll make sense. |
Chas1969
| | Posted on Tuesday, August 05, 2008 - 02:47 pm: |
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UpDate: 400-500 miles, Me Likey exhaust all the time wired-open Smooth
MPG: 48 mpg 65-75mph so really same mileage as before.
FYI: Bike magazine had a little article in recent issue and 'valve' with exhaust has "more to do with loudness (regulation) than mid range". Something to chew on |
Growl
| | Posted on Wednesday, August 06, 2008 - 12:52 am: |
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Does all this mean that I could adjust the exhaust valve to operate normally with the exception that at 1500 to 3000 rpms it is always open? |
Sekalilgai
| | Posted on Wednesday, August 06, 2008 - 10:10 am: |
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From what I can tell it is this:
1500-3300 : Open
3300-5050 : Closed (same as stock)
5050-up : Open
WOT conditions : Open (same as stock)
My increase in mileage probably has more to do with riding in flatland portions of Ohio since the bulk of those miles were at 3500. |
Growl
| | Posted on Thursday, August 07, 2008 - 08:28 am: |
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Thanks for the info! Just to clarify: idle to 1500 remains closed? |
Sekalilgai
| | Posted on Thursday, August 07, 2008 - 09:16 am: |
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Growl
The little table in my last post reflects what happened when I just modified 0x204.
Given the default values that came in my ECM, the valve is closed at idle.
Later, I altered my 'Region 1' values by cutting them in half so that the valve is open by 750 rpm, or pretty much by the time the engine starts. I did it initially to see if I could hear the difference (being too lazy to open the airbox cover) but kept it that way to minimize all the cycling of the motor. |
Growl
| | Posted on Thursday, August 07, 2008 - 10:57 pm: |
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Could you tell any difference in off idle performance between the open and closed state? |
Sekalilgai
| | Posted on Sunday, August 10, 2008 - 10:30 pm: |
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I had a similar experience as the guys who wired their exhaust valves open. It was a little easier to modulate ...kinda gave me around town luggability in 2nd gear.... |
Growl
| | Posted on Monday, September 29, 2008 - 03:06 am: |
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Sekalilgai:
Still happy with the ECM control of exhaust actuator mods? Is the Actuator still holding up? |
