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phila_dot
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« Reply #345 on: July 30, 2013, 02:49:34 PM »
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You can always log B_ldsua to confirm.
IIRC, the was a code change or two in LDUVST.
Like prj said, there's a ton of changes that haven't been documented. I'm finally setting up a new laptop now and will be starting to work on this again shortly. However, I alot of my free time will be spent wrenching on my latest S4.
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julex
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« Reply #346 on: July 30, 2013, 04:52:45 PM »
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Yes, I logged b_ldsua earlier today along with cells migration and values change (SDLDSUA doesn't have axis per se, it is hardcoded so you need to shift cells first into 1/2 pressure slots on the axis and then lower the cell values themselves by 1/2) and oh boy.... now we are talking. Basically, anybody deleting N249 is super retarded, no offense, as they REALLY don't know what they're doing.
In my case, N249 is activated via b_ldsua up to about 60 load (no scaling) and the engine got super snappy in part throttle while before, with deleted N249 or with it in place but table messed up, the car would basically be falling on its face in part throttle in vicinity of -8inhg to 0ish-1psi. It makes sense that opening the DVs with vacuum reserve allows to free flow of air in NA engine fashion and turbos don't have to work and kill engine efficiency.
On the other side of scale, i've seen mega spikes of pressure and super loud surge sound when coming out of WOT @ 32psi with N249 delete, the pressure at sensor would spike to 40psi.
DO NOT DELETE N249... you will sacrifice part throttle economy and response as well as basically risk catastrophic failure of turbo due to surge.
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Milka
Full Member
Karma: +3/-0
 Offline
Posts: 129
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« Reply #347 on: July 30, 2013, 05:04:51 PM »
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Totally agree, I originally deleted and then later added it back in and much better part throttle and lifting off at the end of a WOT run with n249 back in place.
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britishturbo
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« Reply #348 on: July 30, 2013, 05:48:44 PM »
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Yes, I logged b_ldsua earlier today along with cells migration and values change (SDLDSUA doesn't have axis per se, it is hardcoded so you need to shift cells first into 1/2 pressure slots on the axis and then lower the cell values themselves by 1/2) and oh boy.... now we are talking. Basically, anybody deleting N249 is super retarded, no offense, as they REALLY don't know what they're doing.
In my case, N249 is activated via b_ldsua up to about 60 load (no scaling) and the engine got super snappy in part throttle while before, with deleted N249 or with it in place but table messed up, the car would basically be falling on its face in part throttle in vicinity of -8inhg to 0ish-1psi. It makes sense that opening the DVs with vacuum reserve allows to free flow of air in NA engine fashion and turbos don't have to work and kill engine efficiency.
On the other side of scale, i've seen mega spikes of pressure and super loud surge sound when coming out of WOT @ 32psi with N249 delete, the pressure at sensor would spike to 40psi.
DO NOT DELETE N249... you will sacrifice part throttle economy and response as well as basically risk catastrophic failure of turbo due to surge.
You know I might just put the N249 back on the car to see how it runs that way... just as a test, but I don't have any of the problems you describe. |
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ddillenger
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« Reply #349 on: July 30, 2013, 06:04:05 PM »
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You know I might just put the N249 back on the car to see how it runs that way... just as a test, but I don't have any of the problems you describe.
Do you even make boost at part throttle? Your logs look like a lightswitch. |
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Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your experience!
Email/Google chat:
DDillenger84(at)gmail(dot)com
Email>PM
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britishturbo
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« Reply #350 on: July 30, 2013, 06:25:28 PM »
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Do you even make boost at part throttle? Your logs look like a lightswitch.
Haha yeah, it does, just not like k03's or anything ;-) New turbo comes tomorrow though, 6466, should have a lot more boost down low and at part throttle. |
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Snow Trooper
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« Reply #351 on: July 31, 2013, 11:09:03 AM »
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Did I miss soothing?
Yeah, seriously.... What are you and matchew going on about now PRJ? Motivations....  ?  |
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cartoons?
6A 61 72 65 64 40 76 6C 6D 73 70 65 63
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prj
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« Reply #352 on: July 31, 2013, 02:47:39 PM »
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Yes, I logged b_ldsua earlier today along with cells migration and values change (SDLDSUA doesn't have axis per se, it is hardcoded so you need to shift cells first into 1/2 pressure slots on the axis and then lower the cell values themselves by 1/2) and oh boy.... now we are talking. Basically, anybody deleting N249 is super retarded, no offense, as they REALLY don't know what they're doing.
In my case, N249 is activated via b_ldsua up to about 60 load (no scaling) and the engine got super snappy in part throttle while before, with deleted N249 or with it in place but table messed up, the car would basically be falling on its face in part throttle in vicinity of -8inhg to 0ish-1psi. It makes sense that opening the DVs with vacuum reserve allows to free flow of air in NA engine fashion and turbos don't have to work and kill engine efficiency.
On the other side of scale, i've seen mega spikes of pressure and super loud surge sound when coming out of WOT @ 32psi with N249 delete, the pressure at sensor would spike to 40psi.
DO NOT DELETE N249... you will sacrifice part throttle economy and response as well as basically risk catastrophic failure of turbo due to surge.
ha-ha, try telling it to the "experts" on here  As for your other stuttering stuff, e-mail a 3rd gear log starting at 800 rpm with wgdc fixed to 0 and your file, and I can try to see if I can make it somewhat better. |
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britishturbo
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« Reply #353 on: August 01, 2013, 08:39:21 AM »
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ha-ha, try telling it to the "experts" on here As for your other stuttering stuff, e-mail a 3rd gear log starting at 800 rpm with wgdc fixed to 0 and your file, and I can try to see if I can make it somewhat better. I don't claim to be an expert... And I've never actually ran my car with an N249... it was removed when first setting up my single turbo setup, probably for all the wrong reasons considering when I took it off I didn't know exactly how it worked and was following the general trend... So I'm actually in the process of putting the N249 back on the car for some back to back testing. |
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julex
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« Reply #354 on: August 01, 2013, 09:06:18 AM »
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N249 delete:  |
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britishturbo
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« Reply #355 on: August 01, 2013, 09:09:22 AM »
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Yeah the boost spikes are what I'm hoping the N249 will take care of.
But I don't hear any compressor surge, emphasis on hear lol.
I'll try and find some more vacuum line and test it today!
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julex
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« Reply #356 on: August 01, 2013, 09:09:36 AM »
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ha-ha, try telling it to the "experts" on here As for your other stuttering stuff, e-mail a 3rd gear log starting at 800 rpm with wgdc fixed to 0 and your file, and I can try to see if I can make it somewhat better. I'll take you on the offer  |
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catbed
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« Reply #357 on: August 02, 2013, 10:23:02 AM »
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Yeah the boost spikes are what I'm hoping the N249 will take care of.
But I don't hear any compressor surge, emphasis on hear lol.
I'll try and find some more vacuum line and test it today!
FWIW, I re-installed my n249 on my BT 1.8 and noticed less compressor noise off the throttle. I too went with the crowd and deleted my n249 early on. |
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julex
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« Reply #358 on: August 02, 2013, 10:51:39 AM »
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FWIW, I re-installed my n249 on my BT 1.8 and noticed less compressor noise off the throttle. I too went with the crowd and deleted my n249 early on.
I second that. I had a very clear spool up noise from turbos in sub 0psi in part throttle which is gone now with N249 in place and allowing the engine to breathe. The noise was indicative of energy wasted to unnecessarily spool turbos with the intake air. |
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britishturbo
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« Reply #359 on: August 06, 2013, 07:28:15 AM »
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fix for britishturbo and others who doesn't like KFLDHBN's limit of 4bar Patch
0x7030C F0 94 C2 F4 36 8B 1B 94
to
0x7030C C2 F9 36 8B 5C 19 1B 49
and KFLDHBN's values are valued twice as high. Change Z conversion factor of KFLDHBN to 0,031250 and you should be set Not tested IRL but ought to work. (based on prj's quick fix, shl #1 pu) Seg0x21c@870000:02F6 mov r12, #1816h
Seg0x21c@870000:02FA mov r13, #206h
Seg0x21c@870000:02FE mov r14, #10Bh
Seg0x21c@870000:0302 mov r15, #204h
Seg0x21c@870000:0306 calls 80h, LookupZ_804906 ; References a lookupZ table
Seg0x21c@870000:030A add r0, #4
Seg0x21c@870000:030C mov r9, r4
Seg0x21c@870000:030E movbz r4, pu_byte_380B36
Seg0x21c@870000:0312 mulu r9, r4
Seg0x21c@870000:0314 mov r9, MDL
Seg0x21c@870000:0318 mov r4, pirg_w_word_382178
Seg0x21c@870000:031C shr r4, #1
Seg0x21c@870000:031E mov r5, r9
Seg0x21c@870000:0320
Seg0x21c@870000:0320 loc_870320:
Seg0x21c@870000:0320 sub r5, r4
becomes
Seg0x21c@870000:02F6 mov r12, #1816h
Seg0x21c@870000:02FA mov r13, #206h
Seg0x21c@870000:02FE mov r14, #10Bh
Seg0x21c@870000:0302 mov r15, #204h
Seg0x21c@870000:0306 calls 80h, LookupZ_804906 ; References a lookupZ table
Seg0x21c@870000:030A add r0, #4
Seg0x21c@870000:030C movbz r9, pu_byte_380B36
Seg0x21c@870000:0310 shl r9, #1
Seg0x21c@870000:0312 mulu r4, r9
Seg0x21c@870000:0314 mov r9, MDL
Seg0x21c@870000:0318 mov r4, pirg_w_word_382178
Seg0x21c@870000:031C shr r4, #1
Seg0x21c@870000:031E mov r5, r9
Seg0x21c@870000:0320
Seg0x21c@870000:0320 loc_870320:
Seg0x21c@870000:0320 sub r5, r4 I'm going to test this today! I'll let you know how it works.  |
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