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Author Topic: Ramp up PID  (Read 21214 times)
majorahole
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« on: June 04, 2015, 11:34:37 AM »

trying to get my n75 DC to stay up a little bit longer. IMX isn't doing the job, so I'm thinking I have to adjust my PID. from what I read on s4 wiki, do I need to reduce Q2 a bit if adding to IMX doesn't do it.
can someone please confirm?
thanks!
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nyet
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« Reply #1 on: June 04, 2015, 11:39:39 AM »

Yes, reduce Q2 for large lde...
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majorahole
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« Reply #2 on: June 04, 2015, 12:14:21 PM »

Yes, reduce Q2 for large lde...
ok thanks!!
I already tried a small adjustment of -0.5 and couldn't tell a difference. I'll try a little more
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nyet
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« Reply #3 on: June 04, 2015, 12:59:06 PM »

ok thanks!!
I already tried a small adjustment of -0.5 and couldn't tell a difference. I'll try a little more

Make sure to log the D contribution to see what is going on. Typically, very large changes in Q2 are required to see anything (like >25% or more)
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majorahole
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« Reply #4 on: June 04, 2015, 01:07:57 PM »

I haven't figured out how to log those variables yet for med9, mine is off about 150-170hpa so I changed the 100 & 200, I'll go a bit more then.
thank you again!
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majorahole
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« Reply #5 on: June 10, 2015, 08:02:44 AM »

so went up to 35% and I'm makeing even less boost at peak then before.
maybe I m not understanding how this works, the are the PIDs used, let say, when I'm wot from a stop going through the gears? or when cruising 60mph in 6th gear and I got wot and boost builds up quick?
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nyet
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« Reply #6 on: June 10, 2015, 09:49:46 AM »

so went up to 35% and I'm makeing even less boost at peak then before.
maybe I m not understanding how this works, the are the PIDs used, let say, when I'm wot from a stop going through the gears? or when cruising 60mph in 6th gear and I got wot and boost builds up quick?

Stop what you are doing. Do not go any further until you understand how PIDs work.

Also, you really should be posting logs.
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majorahole
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« Reply #7 on: June 10, 2015, 09:56:59 AM »

whoops, meant -35%.
anyways it doesn't seem like anyone knows?? can't find any type if thread with actual info, I found a link to the Wikipedia on PID, but that's more confusing as it doesn't translate to what we're doing here with. at least not how I am understanding it. could u maybe give a link?
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nyet
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« Reply #8 on: June 10, 2015, 10:05:10 AM »

anyways it doesn't seem like anyone knows??

/rolls eyes

Quote
can't find any type if thread with actual info, I found a link to the Wikipedia on PID, but that's more confusing as it doesn't translate to what we're doing here with. at least not how I am understanding it. could u maybe give a link?

Explaining PIDs is beyond the scope of this forum...

Post logs, or there is no point to this discussion.
« Last Edit: June 10, 2015, 10:36:45 AM by nyet » Logged

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majorahole
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« Reply #9 on: June 10, 2015, 11:21:20 AM »

/rolls eyes

Explaining PIDs is beyond the scope of this forum...

Post logs, or there is no point to this discussion.
why?
you can't understand that I'm trying to keep 95% WG duty cycle a little longer?? logs are going to help how???
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nyet
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« Reply #10 on: June 10, 2015, 11:25:08 AM »

why?

Not sure which statement you are referring to.

1) It requires significant effort on the part of the noob to even get started understanding PIDs... stuff that can't be spoon fed in a simple howto (which would no doubt get ignored anyway). You yourself can't be bothered to understand how the WP article applies to WG control, something that should be pretty obvious.

or

2) should be obvious why

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majorahole
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« Reply #11 on: June 10, 2015, 11:25:51 AM »

there was supposed to be more there, idk why it wasn't
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nyet
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« Reply #12 on: June 10, 2015, 11:26:40 AM »

you can't understand that I'm trying to keep 95% WG duty cycle a little longer?? logs are going to help how???

Without seeing EXACTLY what is preventing your WG from being 95%, there is no way to tell you how to keep your WG 95% longer.
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majorahole
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« Reply #13 on: June 10, 2015, 11:28:18 AM »

its not, you'll see my WG DC dips and I want it to stay?? I have no other parameters that I can log to help
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majorahole
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« Reply #14 on: June 10, 2015, 11:39:56 AM »

its med9, I don't have a way to log those other variables.
that's why I'm just trying here and there.
could you tell me under what circumstances would one adjust Q0 or Q1??
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