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Author Topic: MED9 boost control dynamic/steady misunderstood  (Read 2390 times)
curamrdan
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« on: October 20, 2018, 03:20:04 PM »

Hello, playing with my 2.0tfsi CDL engine(scirocco r, sw 510587), full stock.
Trying to figure out how to fix boost spikes/overshooting. I just rised boost 0.1bar over stock (to cca 1.2bar). Know that small spikes are desired from factory, but with higher target start to be bigger as well.
Just tried to numb them by all ways i know, results was more o less the same, +0.2bar spikes.
There is still a 5-8% N75dc upkick after first huge dc drop from 95%, probably when boost reach static operation area(delta pressure (lde?)<140hpa), no matter i do.  Too much dynamic D overall or just lowest delta rows(as there is notiecable bend in spool before target, so assuming too much D right now). Hugely lowered(multiple times of factory values) dynamic P and also then I.
Can anybody give me a hint? I dont want force limit DC by kfldrl.

Second issue, boost not reaching tagret around 5000rpm, still im under by cca 50hpa no matter adding steady P or I  and imx values. Boost adaptations on vcds showing negative 3~4%.

Here is logpicture from my last attempt + Moded file.
« Last Edit: October 20, 2018, 03:36:23 PM by curamrdan » Logged
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