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prj
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« Reply #2295 on: May 23, 2023, 03:24:33 AM »
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But what about boost? It should be dramatically falled due to injection disabling. No. Because the throttle never closes if you shift fast then no problem with boost, recovery is instant. What really hurts boost is shutting the throttle, this basically stops the turbo from spinning. -20 is way too late there is no proper combustion process there... Also idk what "launch_start_nmot_w" is set to, if it's too low then it's constantly jumping between -20 and +20 or something. |
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prometey1982
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« Reply #2296 on: May 23, 2023, 04:43:57 AM »
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can you share csv logs?
Sure. Attached. |
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prometey1982
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« Reply #2297 on: May 23, 2023, 04:46:57 AM »
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-20 is way too late there is no proper combustion process there...
Also idk what "launch_start_nmot_w" is set to, if it's too low then it's constantly jumping between -20 and +20 or something.
What ignition angle are you suggest? launch_start_nmot_w was set to 2700 rpm. Also I tried to enrich mixture to 0.8 AFR but it didn't help. |
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prj
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« Reply #2298 on: May 23, 2023, 04:48:07 AM »
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Try 0 and go from there.
-20 is way too late.
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prometey1982
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« Reply #2299 on: May 23, 2023, 05:04:46 AM »
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I wanted to use to limit torque in 1st and 2nd gear
If there is wheel speed from rear wheels then you can implement torque control inside ECM. And it can also implemented by input from rear lambda sensor. But external controller should be used to generate input signal. |
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prometey1982
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« Reply #2300 on: May 23, 2023, 05:05:58 AM »
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Try 0 and go from there.
-20 is way too late.
Ok, I'll try. Thanks. But which boost level can I expect? |
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Sashka_
Newbie
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« Reply #2301 on: May 23, 2023, 08:17:20 AM »
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prj
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« Reply #2302 on: May 23, 2023, 08:50:45 AM »
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Ok, I'll try. Thanks. But which boost level can I expect?
Nobody can answer that. Boost obviously depends on turbo and rpm. I never had any issues making as much boost as I wanted. You can also start by tuning your boost control properly so that DC is not 78% when LDE is over 1 bar. |
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« Last Edit: May 23, 2023, 08:53:22 AM by prj »
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Sashka_
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« Reply #2303 on: May 23, 2023, 08:55:55 AM »
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I wanted to use redsol to keep the throttle open when not requiring a lot of torque. Porsche has something similar. https://youtu.be/18AP4R_btKI?t=111what are you going to use it for on a manual?
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prj
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« Reply #2304 on: May 23, 2023, 01:29:32 PM »
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You need direct injection to do that properly, port injection is not fast enough. And if you need to ask about it you're not gonna implement it anyway... Even on a DI ECU a lot of shit needs to be rewritten for this to work. |
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« Last Edit: May 23, 2023, 01:31:36 PM by prj »
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keichi
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« Reply #2305 on: May 24, 2023, 03:34:11 AM »
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I easily do 1,1-1,2 bar with my anti-lag. But i use -24 ignition retard - i checked a lot of ignition value combinations and the more retarded timing the more boost - at least on 2.3 engine with 19T turbo  And i control rpm by histeresis setting redsol between some arbitrary values like 1 or 3. I do not use redsol 5 at all - it is basically "shutting off" the engine and boost drops a lot I think your code too much utilizes redsol 5. And of course i dump as much fuel as possible to cool things down a bit because EGT goes crazy Is jumps to like 980-1000 degree in 1-2 seconds |
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« Last Edit: May 24, 2023, 03:38:14 AM by keichi »
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prj
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« Reply #2306 on: May 24, 2023, 03:55:13 AM »
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-24 is just burning it with valve open, that's why EGT is insane.
Should never be neccessary.
I think two problems here that are clear.
a) Bad boost control, N75 not 95% with big LDE.
b) Bad camshaft maps. Camshafts should be in overlap to make boost, but in log intake camshaft looks in late position.
Then no need for stupid amount of ignition retard.
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prometey1982
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« Reply #2307 on: May 24, 2023, 04:04:04 AM »
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-24 is just burning it with valve open, that's why EGT is insane.
Should never be neccessary.
I think two problems here that are clear.
a) Bad boost control, N75 not 95% with big LDE.
b) Bad camshaft maps. Camshafts should be in overlap to make boost, but in log intake camshaft looks in late position.
Then no need for stupid amount of ignition retard.
I've set ltvdm to 100% but nothing changes. Here is my current KFNWSE map. And logs with -15 degrees. |
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prometey1982
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« Reply #2308 on: May 24, 2023, 04:05:49 AM »
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I easily do 1,1-1,2 bar with my anti-lag. But i use -24 ignition retard - i checked a lot of ignition value combinations and the more retarded timing the more boost - at least on 2.3 engine with 19T turbo And i control rpm by histeresis setting redsol between some arbitrary values like 1 or 3. I do not use redsol 5 at all - it is basically "shutting off" the engine and boost drops a lot I think your code too much utilizes redsol 5. And of course i dump as much fuel as possible to cool things down a bit because EGT goes crazy Is jumps to like 980-1000 degree in 1-2 seconds Ok, I'll check launch with max redsol = 3. Which launch RPM are you use? |
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prj
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« Reply #2309 on: May 24, 2023, 04:29:54 AM »
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No idea what values you are logging, but if on throttle you move both camshafts exactly the same then result is same overlap as if you would not move them.
As I said, I never had any issues making whatever boost on any car, and I have never needed to melt the exhaust manifold to do it.
From the log you're always on redsol 5, that's also why it does not make any boost...
Rewrite your logic to use nmax with throttle and just add 1-2, max 3 redsol.
Of course maybe you're running something like a GT40, then that's a bit tough to spool on a small engine and requires a transbrake...
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