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Author Topic: Opinions: using KFLBTS vs LAMFA for fuel all the time?  (Read 384290 times)
jibberjive
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« Reply #300 on: April 02, 2012, 08:29:08 PM »

Conclusion is that if I had fixed BTS fueling I would had much heavier corrections at a target AFR with possibility of maxxing them out altogether and pinging he engine..
Though BTS' timing corrections would have been more heavy handed with degrees pulled, corrections via pulling timing in general are "safer" (reduce knock more quickly) than AFR corrections, no? So, assuming that you didn't hit the CF limit, BTS corrections in this same case would have been more conservative, right?
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s5fourdoor
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« Reply #301 on: April 02, 2012, 11:55:46 PM »

Though BTS' timing corrections would have been more heavy handed with degrees pulled, corrections via pulling timing in general are "safer" (reduce knock more quickly) than AFR corrections, no? So, assuming that you didn't hit the CF limit, BTS corrections in this same case would have been more conservative, right?

everything depends on where the TABGBTS value is set.  if its set high enough that timing and and fuel intervention are occuring at the same time, the answer isn't quite as clear.  as we recall, the knowledge from this thread was that TABGBTS needs to be set at a sufficiently high model temp as to not intervene in normal fueling based on knock.  therefore we'd see the following progression:  normal [0 axis row on KFLAMKRL table]-->  cf-based fueling [negative valued rows on KFLAMKRL table]--> omfg help mode: reduce immediate timing, add to stored memory of knock events, dump fuel to cool down. [KFLBTS]

everything is in delicate balance and has to be done correctly.  has anyone experimented further with the TABGBTS value?  I currently run 900 with no problems.  if the car isn't warm or rlsol gets out of control, the fueling and timing controls just shut the game down immediately.  its perfect.  if you were lucky enough to have logged, you can see where and when the fueling / timing were off, and make adjustments to your [KFLF] or [FKKVS] or [MLHFM] or [KFZW] or [KFLDRL] map, depending on what you believe caused the over/under abundance of timing/boost/fuel w/e your log shows.

is this clear enough for the wiki?

now if we could only figure out the torque model epsilon bounds.
say, has anyone ever seen that site from a few years ago where some team of engineers made an exact model using Excel of the 2.7tt engine?  throw me a bone anyone please?
« Last Edit: April 03, 2012, 12:01:33 AM by nehalem » Logged
jibberjive
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« Reply #302 on: April 03, 2012, 12:31:18 AM »

Thanks for the response.  Looks clear enough for the wiki to me (though maybe I understood it because of the weeks and weeks of reading and experimenting I have done ha.)However, my reply was to the hypothetical I quoted ("if I had fixed BTS fueling"), as if there was no KR based fueling (so, a different, lower TAGBTS).

No idea what you're talking about with the excel sheet btw.
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Rick
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« Reply #303 on: April 04, 2012, 08:45:37 AM »

You shouldn't be using t he BTS function on a modified car. You have no way of correctly modelling the EGT

Rick
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elRey
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« Reply #304 on: April 04, 2012, 08:51:24 AM »

You shouldn't be using t he BTS function on a modified car. You have no way of correctly modelling the EGT

Rick

Sounds like a good excuse to use it for main fueling then.  Grin
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s5fourdoor
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« Reply #305 on: April 04, 2012, 10:39:34 AM »

Sounds like a good excuse to use it for main fueling then.  Grin

hahahah, this made me crack up.  elrey, any chance you could upload your KFLBTS screenshot/table?
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elRey
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« Reply #306 on: April 04, 2012, 11:10:18 AM »

I don't claim to be a tuner. Just a hobbyist just playing around with my own car. (the car btw -> http://forums.vwvortex.com/showthread.php?4260387



« Last Edit: April 04, 2012, 12:48:19 PM by elRey » Logged
s5fourdoor
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« Reply #307 on: April 04, 2012, 12:42:37 PM »

no way dude, don't be bashful, that post was hellllla sick
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Snow Trooper
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« Reply #308 on: April 04, 2012, 02:13:50 PM »

wait what are we talking about now???

i currently us Lamfa, bts, krl in conjunction.  why not use all when we can?
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phila_dot
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« Reply #309 on: April 04, 2012, 03:02:41 PM »

i currently us Lamfa, bts, krl in conjunction.  why not use all when we can?

This
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TTQS
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« Reply #310 on: April 07, 2012, 02:36:43 AM »

TABGBTS value?  I currently run 900 with no problems.

I can't get EGT beyond 930°C even on long 4th gear WOT runs. Never had any problems and not seen any LAMBTS interventions in ME7L logs.

say, has anyone ever seen that site from a few years ago where some team of engineers made an exact model using Excel of the 2.7tt engine?  throw me a bone anyone please?

Holy crap! I'd love to see that. Nye would probably puke at the sight of anything done in Excel but I'd get a boner! Grin

TTQS
« Last Edit: April 07, 2012, 02:38:40 AM by TTQS » Logged
nyet
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« Reply #311 on: April 07, 2012, 11:42:17 AM »

oh my god the horror Sad

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jibberjive
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« Reply #312 on: April 07, 2012, 01:29:41 PM »

lol!
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Bische
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« Reply #313 on: April 09, 2012, 10:22:07 AM »

Is this what you are looking for?
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s5fourdoor
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« Reply #314 on: April 09, 2012, 10:31:44 AM »

Is this what you are looking for?
yes...  **** YES
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