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Author Topic: 1.8t: electronic SUV via N249 output  (Read 62331 times)
snakey001
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« Reply #30 on: December 28, 2014, 02:27:30 AM »

Hi, can you measure the resistance on this valve? (dierburg oermany)
« Last Edit: December 28, 2014, 02:29:48 AM by snakey001 » Logged
fukenbroken
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mk4 1.8T AUM


« Reply #31 on: January 06, 2015, 06:06:05 PM »

hi folks
we`re installed that dv into 1.8t AUM engine w FT21 @20psi. all seems good, unfortunatly no logs for now. maybe later..





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thelastleroy
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« Reply #32 on: January 06, 2015, 06:35:46 PM »

Amazing! How is the operation? Does it feel like the stock bypass valve when you drive? Is the boost returning enough between shifts?

My new genuine valve arrived a few days ago, broken. That's two mail-order valve problems in a row Roll Eyes New one's in the mail. Hopefully in a large, bubble-wrapped package.

Wicked to see this on the car. Can't wait to see logs! Good work!
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fukenbroken
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mk4 1.8T AUM


« Reply #33 on: January 06, 2015, 07:12:54 PM »

we checked dv before assembling - piston moves when b_ldsuad & b_ldsuas =1

so we simply plug it and  goes for a drive but only for 15 mins preferably at snowy roads Smiley
and because its a friend`s car a icant say anything about feelings.
it produces nice sound btw  Smiley
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A4Rich
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« Reply #34 on: January 06, 2015, 09:46:03 PM »

I need to get on this done...  Smiley

Just wanted to mention that b_ldsuas (opening of dv under cruise) is only set when pressure ratio is less than SVDLDUVS.  In many of the 1.8T files SVDLDUVS = 0s so the condition can not be set.  In the 225 TT file SVDLDUVS =1s and in FR the max is 1.3.

In the 518AK 003 Bin I believe i found the 16x1 SVDLDUVS map.
location: 27E81 factor 0.015625
axis: 27E71 factor 40.0 (RPM)
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TijnCU
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flying brick


« Reply #35 on: January 07, 2015, 01:31:33 AM »

Cool! Especially under cruise this mod would be a big advantage, since you will never run out of vacuum to control the dv. Maybe in larger turbo applications this is not a concern (i dont know the characteristics), but I never have vacuum while cruising, always 100-200mbar above absolute so I run out of vacuum after a while  Smiley
« Last Edit: January 07, 2015, 02:11:25 AM by TijnCU » Logged

aef
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« Reply #36 on: January 07, 2015, 02:51:32 AM »

fukenbroken is this a genuine vag alloy adapter?

Here is a "hack" for better flow.

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fukenbroken
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mk4 1.8T AUM


« Reply #37 on: January 07, 2015, 07:17:33 AM »

its usp motorsports flange

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TijnCU
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flying brick


« Reply #38 on: January 21, 2015, 02:55:15 AM »

I have jumped aboard too  Grin
Mostly interested in activating under cruise to improve economy!
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funnix
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1.8t AUM


« Reply #39 on: January 21, 2015, 03:42:14 AM »

Very cool, a video and logs would be great!  Grin
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TijnCU
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flying brick


« Reply #40 on: January 21, 2015, 03:29:31 PM »

Some part I translated from the FR:
An approximate pressure ratio will be calculated from the division of pvdks through pu.
If the actual pressure ratio is below a certain maximum value (table SVDLDUVS), the bypass valve (n249) will be activated.
When the actual desired pressure plsol rises above the ambiant pressure (pu) + LDUVRS + HSLDSUA (for example when you press the throttle), the bypass valve will be instantaniously deactivated.

The maximum value in my mapping for svdlduvs is 3.9844. It is currently set to:
rpm 0   - 640       - 1280    - 1920   - 2560   - 3200    - 3840    - 4480   - 5120  -->
1,1094 - 1,1406   - 1,1875 - 1,2500    - 1,2969 - 1,3281 - 1,3438 - 1,3594 - 1,3750

There is another map, GWPLDU, which states the decrease in pedal % that will activate the n249, in my mapping it is set to -6.64%. I presume one could adjust this to get a more "raw" DV actuation if the smoothness of the n249 is not wished.
« Last Edit: January 21, 2015, 03:39:40 PM by TijnCU » Logged

TijnCU
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flying brick


« Reply #41 on: January 22, 2015, 05:09:25 AM »

Hi, can you measure the resistance on this valve? (dierburg oermany)
I have measured my OEM  unit (06F 145 710 G) and it is 14.5ohms
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A4Rich
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« Reply #42 on: January 22, 2015, 09:06:19 AM »

The maximum value in my mapping for svdlduvs is 3.9844. It is currently set to:
rpm 0   - 640       - 1280    - 1920   - 2560   - 3200    - 3840    - 4480   - 5120  -->
1,1094 - 1,1406   - 1,1875 - 1,2500    - 1,2969 - 1,3281 - 1,3438 - 1,3594 - 1,3750
Are you sure about your location of SVDLDUVS?  It doesn't look correct it should be 16x1, see attached tt225 SVDLDUVS.

There is another map, GWPLDU, which states the decrease in pedal % that will activate the n249, in my mapping it is set to -6.64%. I presume one could adjust this to get a more "raw" DV actuation if the smoothness of the n249 is not wished.

Thanks for this, I think I located it on 518AK 003 @ 11921 factor of 0.3906 with a value of -1.953 (this is the same value as 06AHS file).
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TijnCU
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flying brick


« Reply #43 on: January 22, 2015, 09:21:25 AM »

I use the 225 APX file (512kb) with a damos pack. I just cut out the values beyond 5120 rpm because they where all 1,3750, hence the arrow ->  Roll Eyes sorry to confuse anybody. I will check it to be sure, there are some errors in the damos sometimes. Maybe wrong factor.
** my RPM axis is generated from 1,2,3 with factor 640, I will reference it with the BAM file to get the right axis in there...
That looks better:
« Last Edit: January 22, 2015, 09:38:48 AM by TijnCU » Logged

A4Rich
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« Reply #44 on: January 22, 2015, 09:39:41 AM »

I use the 225 APX file (512kb) with a damos pack. I just cut out the values beyond 5120 rpm because they where all 1,3750, hence the arrow ->  Roll Eyes sorry to confuse anybody. I will check it to be sure, there are some errors in the damos sometimes. Maybe wrong factor.

No need to be sorry, thanks for the clarification I was using the 225 BAM damos. Smiley 
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