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  #271  
Old 03-15-2010, 11:23 PM
cdvs cdvs is offline
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Re: Gearshift Maps

I have developed a Windows .NET app to download SVX ROMs.

If anyone is interested you can read about it here:

http://www.MusicReMasters.com/Clarin...SvxRomDump.rtf

If it appears to be of use to you, PM a request to me including your actual email address.

Charl
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  #272  
Old 03-16-2010, 05:25 PM
NiftySVX NiftySVX is offline
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Re: Gearshift Maps

Just jumping in here as I have been gone awhile and I'm glad this thread is still going.

I am really excited that there appears to be some progress as to decoding the A solenoid, but I am concerned about the idea of playing with it. In fact, pat of level 10 made me promise never to put modified sol A software in the same car as my trans. If we get it wrong it could take a trans out for sure, but more pressure will only have the effect of lower fuel economy so far as I can tell. I agree strongly that changing the line pressure for 3rd and 4th gear could help save the lives of the transmissions for those who don't accomplish this by main valve body modification. Also, I would like to see the base line higher across the board at lower than 15% throttle. I think/agree that this is a likely place where the high clutch slipping is occuring. This would also require some experimentation because of the possibility of transfer binding.

I think a modification of the line pressure by an expert, a tweak of the lockup map for 4th, a lowering of the temp warning, and a lowering of tcc lockup temp. would be a nice progession from what has already been done.

Aisin transmissions do not really care about the torque converter lockup as it relates to ATF temp, they use ECT. I don't know why JATCO designs use ATFT. I think 4th prohibit and TCC lockup should both be about 50 since it won't hurt to have the fluid a little warm and none of us really care if the engine puts out a little higher tailpipe emissions in this day and age for a few miles. I simply do not see the point in heating the fluid to 100 so the converter can lock

I figure this is as good a place as any for my ramblings on this. Congratulations to those who have made these important findings, developments, and programs as they are admired and appreciated.
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  #273  
Old 03-17-2010, 09:28 AM
cdvs cdvs is offline
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Re: Gearshift Maps

Quote:
Originally Posted by NiftySVX View Post
.... a lowering of tcc lockup temp. would be a nice progession from what has already been done.
Unless I missed it, the location of the lockup temperature hasn't been revealed. I agree it would be nice to know. I also don't get why they would have it set so high.
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  #274  
Old 03-17-2010, 05:19 PM
NiftySVX NiftySVX is offline
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Re: Gearshift Maps

Quote:
Originally Posted by cdvs View Post
Unless I missed it, the location of the lockup temperature hasn't been revealed. I agree it would be nice to know. I also don't get why they would have it set so high.
It is somewhere near the 100F mark, but it is more complicated than just a temperature I think. I notice that if I am running the cruise control, it will lock the converter almost right at 100. If I am not, it may or may not lockup depending on some factor that seems to do with load. Like, if you accelerate moderately it will lockup, but if you are cruising it won't. Also, if you get it heated up past 125 or so it seems to lock up very predictably, like if you accelerate the car from a stop at a normal rate it will lock up as it passes the point on the map (like 50 mph or so) almost like a 5th gear.

It was mentioned by someone previously when I brought it up that this may be so it can dry out the fluid, but I don't know what that could mean because water boils at 212, but I may be missing something.

This would be an interesting bit to discover.
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  #275  
Old 07-07-2010, 12:02 AM
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Re: Gearshift Maps

I've downloaded the firmware off a 96 TCU (label is mq) and ported the ECUtune performance shift maps and tcu mods over to it. Here they are:

ROM ID 705405

e206=df : decreased threshold to turn off overheat mode to 203F
e20d=e7 : decreased threshold to start overheat mode to 212F
c024=e7 : decreased threshold to turn on atf temp warning light to 212F
c025=df : decreased threshold to turn off atf temp warning light to 203F

stock rev limits
d9d6: max rpm for each gear manual off 5e,5e,5e,ff
d9da: max rpm for each gear manual on 61,62,64,ff

d2c5: Power MODE IN D 1-2
14 00 80
2B 16 B0
42 2C F0
53 00 F0
FF 00 FF

d2d7: Power MODE IN D 2-3
28 00 80
51 0C AC
7E 18 F0
95 00 F0
FF 00 FF

d1db: NORMAL MODE IN D 2-1
0F 00 80
0F 00 C0
2D 19 F0
FF 00 FF

d1ba: NORMAL MODE IN D 1-2
0F 00 80
1E 33 C0
3C 19 F0
53 00 F0
FF 00 FF

d1cc: NORMAL MODE IN D 2-3
1E 00 80
3C 19 BC
5A 1B F0
95 00 F0
FF 00 FF
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  #276  
Old 09-28-2010, 02:05 PM
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Re: Gearshift Maps

Hey Phil,

I was looking over your explanation of the solenoid a duty cycle control you gave on page 17 of this thread. Really awesome and incredibly useful stuff but I have found a few important corrections to make to it. With them I'm now able to prevent high clutch and brake band burn out through the TCU software.

1st, the higher the calculated value the lower the solenoid a duty cycle. I believe 4a38 is the max value that can be used in the maps and it equates to a 5% duty cycle.

The 4 maps you hadn't figured out the purpose for yet (CA46,CA5E,CA76,CA8E), are actually the main solenoid a duty cycle maps. These are the ones we want to modify to prevent high clutch and brake band burn up--the maps at ca76 and ca8e to be specific (3rd and 4th gear maps). The 3rd and 4th gear maps are the same and look like this:


With those maps we cruise around in 3r or 4th gear with a plduty of around 50-60%. Filling the maps with a m value of 00 and a c value of 4a38 we cruise around in 3rd or 4th with a plduty of around 6-12% (depending on barometric pressure and throttle position). This gives us the line pressure to prevent high clutch and brake band burn up. This also makes 3rd and 4th gear catch faster, making the shift faster. I am now making this modification to the ECUtune TCUs.
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  #277  
Old 09-28-2010, 02:50 PM
NeedForSpeed NeedForSpeed is offline
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Re: Gearshift Maps

Michael,

Were the duty-A cycles on the 96 TCU the same as the earlier 92 TCU programming, or did Subaru increase the pressure on the later TCU?
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  #278  
Old 09-28-2010, 02:54 PM
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longassname longassname is offline
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Re: Gearshift Maps

I haven't checked. I haven't done any line pressure mods to the 96 tcu yet.

Quote:
Originally Posted by NeedForSpeed View Post
Michael,

Were the duty-A cycles on the 96 TCU the same as the earlier 92 TCU programming, or did Subaru increase the pressure on the later TCU?
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  #279  
Old 09-28-2010, 03:59 PM
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Re: Gearshift Maps

Quote:
Originally Posted by longassname View Post
Hey Phil,

I was looking over your explanation of the solenoid a duty cycle control you gave on page 17 of this thread. Really awesome and incredibly useful stuff but I have found a few important corrections to make to it. With them I'm now able to prevent high clutch and brake band burn out through the TCU software.

1st, the higher the calculated value the lower the solenoid a duty cycle. I believe 4a38 is the max value that can be used in the maps and it equates to a 5% duty cycle.

The 4 maps you hadn't figured out the purpose for yet (CA46,CA5E,CA76,CA8E), are actually the main solenoid a duty cycle maps. These are the ones we want to modify to prevent high clutch and brake band burn up--the maps at ca76 and ca8e to be specific (3rd and 4th gear maps). The 3rd and 4th gear maps are the same and look like this:


With those maps we cruise around in 3r or 4th gear with a plduty of around 50-60%. Filling the maps with a m value of 00 and a c value of 4a38 we cruise around in 3rd or 4th with a plduty of around 6-12% (depending on barometric pressure and throttle position). This gives us the line pressure to prevent high clutch and brake band burn up. This also makes 3rd and 4th gear catch faster, making the shift faster. I am now making this modification to the ECUtune TCUs.
Good work Michael. Thanks for sharing.

So those 4 maps are for constant gear, and maybe the ones I decoded are for during gear shifting? I will go back and look at the code again.
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  #280  
Old 10-01-2010, 06:26 AM
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Re: Gearshift Maps

Quote:
Originally Posted by longassname View Post
I haven't checked. I haven't done any line pressure mods to the 96 tcu yet.
I have decided to definitely get one of these when the time is right. Thanks for the phone conversation the other day. I had one additional thought to our conversation. We discussed ATF fluids briefly and I agree that your combinations are a good one. I have used that additive in the past with great success and I am a big fan of it. I am starting to switch over to Redline with partial drain and fills. I choose Redline for a few reasons. One was the fact that it is ester based and esters are very good at transferring heat. Another one is the viscosity index. When the weather gets cold here, the fluid will thicken up and not flow as well until it heats up. I like the protection I get with a fluid that doesn't change its viscosity as much. And, of course, the fluid should retain its lubricating properties longer.
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1996 Polo Green Subaru SVX LSi, 168,XXX miles, Redline D4 ATF, Redline 75W90 gear oil, K&N HP-4001 Oil Filter, Mobil 1 5W50 FS (3qt) and 5W30 High Mileage (4qt) Oil Blend, Motul RBF600 Brake Fluid, AC Delco A975C Air Filter, NGK BKR6EIX-11 plugs, Centric Rotors, Power Stop Evolution Carbon Fiber Ceramic Brake Pads
2005 Gray Acura RL, 165,XXX miles, Redline D4 ATF with Lubegard Platinum Protectant, Mobil 1 5W20 High Mileage Extended Performance Oil
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  #281  
Old 10-01-2010, 10:20 AM
NeedForSpeed NeedForSpeed is offline
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Re: Gearshift Maps

Quote:
Originally Posted by Huskymaniac View Post
I have decided to definitely get one of these when the time is right. Thanks for the phone conversation the other day. I had one additional thought to our conversation. We discussed ATF fluids briefly and I agree that your combinations are a good one. I have used that additive in the past with great success and I am a big fan of it. I am starting to switch over to Redline with partial drain and fills. I choose Redline for a few reasons. One was the fact that it is ester based and esters are very good at transferring heat. Another one is the viscosity index. When the weather gets cold here, the fluid will thicken up and not flow as well until it heats up. I like the protection I get with a fluid that doesn't change its viscosity as much. And, of course, the fluid should retain its lubricating properties longer.
"that additive"?
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  #282  
Old 10-01-2010, 10:23 AM
NeedForSpeed NeedForSpeed is offline
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Re: Gearshift Maps

Quote:
Originally Posted by longassname View Post
Hey Phil,

I was looking over your explanation of the solenoid a duty cycle control you gave on page 17 of this thread. Really awesome and incredibly useful stuff but I have found a few important corrections to make to it. With them I'm now able to prevent high clutch and brake band burn out through the TCU software.

1st, the higher the calculated value the lower the solenoid a duty cycle. I believe 4a38 is the max value that can be used in the maps and it equates to a 5% duty cycle.

The 4 maps you hadn't figured out the purpose for yet (CA46,CA5E,CA76,CA8E), are actually the main solenoid a duty cycle maps. These are the ones we want to modify to prevent high clutch and brake band burn up--the maps at ca76 and ca8e to be specific (3rd and 4th gear maps). The 3rd and 4th gear maps are the same and look like this:


With those maps we cruise around in 3r or 4th gear with a plduty of around 50-60%. Filling the maps with a m value of 00 and a c value of 4a38 we cruise around in 3rd or 4th with a plduty of around 6-12% (depending on barometric pressure and throttle position). This gives us the line pressure to prevent high clutch and brake band burn up. This also makes 3rd and 4th gear catch faster, making the shift faster. I am now making this modification to the ECUtune TCUs.

Michael,
Subaru could have easily flat-lined the pattern as you did.
In your opinion, why did Subaru design the fancy curve?
What was Subaru thinking in the programming ?
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"QuickChange" http://www.TransGo.com/ http://www.PlanetSVX.com Bontrager Works,

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'92 LS-L Pearl~ '92 LS Pearl~ '92 LS-L Teal~ '92 LS-L Silver~ '95 LSi Polo~
'92 JDM Alcyone SVX Version-L 4WS Pearl~ http://www.subaru-svx.net/forum/showthread.php?t=54143
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  #283  
Old 10-01-2010, 01:45 PM
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Re: Gearshift Maps

Quote:
Originally Posted by NeedForSpeed View Post
"that additive"?
Mike knows what I am talking about, I hope. I didn't want to start a debate on the merits of additives so I intentionally omitted the name.
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1996 Polo Green Subaru SVX LSi, 168,XXX miles, Redline D4 ATF, Redline 75W90 gear oil, K&N HP-4001 Oil Filter, Mobil 1 5W50 FS (3qt) and 5W30 High Mileage (4qt) Oil Blend, Motul RBF600 Brake Fluid, AC Delco A975C Air Filter, NGK BKR6EIX-11 plugs, Centric Rotors, Power Stop Evolution Carbon Fiber Ceramic Brake Pads
2005 Gray Acura RL, 165,XXX miles, Redline D4 ATF with Lubegard Platinum Protectant, Mobil 1 5W20 High Mileage Extended Performance Oil
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  #284  
Old 10-01-2010, 03:19 PM
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Re: Gearshift Maps

Well Ron,

If I were to guess....I would guess they used some formula to project what duty ratio would generate the minimum pressure necessary for the clutch packs to carry the expected torque loads pluss some margin. It doesn't matter to me. I know they missed the mark and the high clutch pack slips at light cruise and I can't imagine the miniscule amount of power it takes to drive the pump against a higher pressure being consequential enough to fiddle around with using anything less than the maximum pressure available.




Quote:
Originally Posted by NeedForSpeed View Post
Michael,
Subaru could have easily flat-lined the pattern as you did.
In your opinion, why did Subaru design the fancy curve?
What was Subaru thinking in the programming ?
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  #285  
Old 10-07-2010, 05:32 PM
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Huskymaniac Huskymaniac is offline
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Re: Gearshift Maps

Quote:
Originally Posted by longassname View Post
I haven't checked. I haven't done any line pressure mods to the 96 tcu yet.
Mike,

Have you had a chance to check if the original duty cycles for solenoid A are the same for the 96 TCU as they were for the older model?
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1996 Polo Green Subaru SVX LSi, 168,XXX miles, Redline D4 ATF, Redline 75W90 gear oil, K&N HP-4001 Oil Filter, Mobil 1 5W50 FS (3qt) and 5W30 High Mileage (4qt) Oil Blend, Motul RBF600 Brake Fluid, AC Delco A975C Air Filter, NGK BKR6EIX-11 plugs, Centric Rotors, Power Stop Evolution Carbon Fiber Ceramic Brake Pads
2005 Gray Acura RL, 165,XXX miles, Redline D4 ATF with Lubegard Platinum Protectant, Mobil 1 5W20 High Mileage Extended Performance Oil
2009 Red Toyota Venza, 123,XXX, Mobil 1 5W30 High Mileage Oil
1992 Red Ferrari 348 ts, 82,XXX, Redline everything
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