dokalanyi
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« on: January 27, 2017, 08:04:40 AM »
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I'd think tuners would leave this stock as a safety net in case of knock. But they don't. Most files increase it to almost LDRXN. Doesn't this pose a danger to the engine?
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Dave9n3
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« Reply #1 on: January 27, 2017, 08:09:02 AM »
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From what I've seen on here people seem to drop LDRXN by 15%, that then becomes LDRXNZK. I suppose if you leave it stock it'll feel like limp mode if you get any knock.
The 15% drop in load may be enough to stop the knock? Don't take what I said as gospel as I know very little, hopefully someone can give us a better explanation than me
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« Last Edit: January 27, 2017, 08:14:41 AM by Dave9n3 »
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Beaviz
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« Reply #2 on: January 30, 2017, 05:16:10 AM »
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In many stock files you will actually see higher values in LDRXNZK than LDRXN. Stock most calibrations are made to make the engine output the same in all conditions, so the driver will not feel a lack of power even though the ignition is retarded. E.g. you will also see a positive factor in KFTARX, which will raise the boost pressure when the intake temperatures rises.
When we push the engine closer to its limits it might be wise to use these maps differently.
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vwaudiguy
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« Reply #3 on: January 30, 2017, 11:26:35 AM »
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I forget what the codeword was, but I read that map wasn't even active in a lot of files.
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"If you have a chinese turbo, that you are worried is going to blow up when you floor it, then LOL."
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Pynoxim
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« Reply #4 on: February 01, 2017, 09:04:18 AM »
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I forget what the codeword was, but I read that map wasn't even active in a lot of files.
That was my understanding as well and I've never seen requested load follow LDRXNZK |
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vwaudiguy
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« Reply #5 on: February 01, 2017, 11:50:42 AM »
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This is from my notes. I've never played with this (yet), but it makes sense based on my limited research.
"B_kfzk controls the switch from LDRXN to LDRXNZK and it is only set if CNOKT.0 is set and
KFSWKFZK < wkrma."
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"If you have a chinese turbo, that you are worried is going to blow up when you floor it, then LOL."
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4ringpieces
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« Reply #6 on: February 03, 2017, 12:36:17 PM »
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there is more to it but yes if cnokt = 0 then b_kfzk will never be set and thus ldrxn will not be switched to ldrxnzk
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vwaudiguy
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« Reply #7 on: February 03, 2017, 01:08:32 PM »
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there is more to it
Inquiring minds want to know.  |
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"If you have a chinese turbo, that you are worried is going to blow up when you floor it, then LOL."
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4ringpieces
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« Reply #8 on: February 03, 2017, 02:15:14 PM »
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So start from the beginning. Page 920 of FR
wkrma (X) and kfswkfzk (Y) both go into and X<Y and the output is either true or 1. (Wkrma is adapted CF I believe and i'm sure wkrm is current CF)
The output of above turns into an input into a &.
The other input of the & is B-krdws (unsure fully what can effect this) into a NOT box (i do not fully understand the function of this NOT box) and then into the &.
The & box is easy, you need both inputs to be 1 to get an output of 1. Any other combination will output = 0.
So for example purposes,
less say wkrma (X) is less than kfswkfzk (Y) and B-krdws (is whatever it needs to be), this then goes into TSWKR (delay) (for a stock 225 cb file that's set to 14s before it sends the output 1 forward)
After TSWKR (delay) this then goes into another &, the other input to this & = cnokt.
So tswkr delay has past and forwarded (1) and cnokt (1) go into this &.
The output of this & for example (1) then goes into a flip flop (which can be reset via C_ini to change its output to 0) which then goes to B_kfzk (switch for ldrxn to ldrxnzk)
Now if you understand the & function, when cnokt = 0 you can never have the 1 output needed to go to B_kfzk.
I looked at where B-krdws comes from but its quite huge see picture attached
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