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Author Topic: Help with boost higher than expected  (Read 42746 times)
nyet
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« Reply #15 on: May 25, 2016, 10:44:45 PM »

99% of all baseline first pass PID tuning is in IMX.
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Tshirt2k
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« Reply #16 on: May 26, 2016, 02:43:50 AM »

Great.

I can have a play with that.
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Tshirt2k
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« Reply #17 on: June 09, 2016, 01:23:02 PM »

I have done linearisation of DRL and seem to have dialled in Dimx fairly well but I large overshoot and cant tell from the logs howto adjust Q2, Map attached. Any pointer on what ide cells i should be adjusting?

There is an area where boost doesn't overshoot at around 4k but i think its helped by some load limiting. Not sure this is the best way. Is that IRL?

There is also some intervention after 6k that im dialing out but the load (rl_w) is way over requested
on some charts, Is that correct?

Log cant be posted for some reason

Does anyone know the ideal boost profile for a BAM / AMK K04 for LDRXN? and max boost?

« Last Edit: June 09, 2016, 01:34:27 PM by Tshirt2k » Logged
nyet
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« Reply #18 on: June 09, 2016, 01:35:07 PM »

Your Q2 map is most definitely defined wrong.

Not sure about requested load, need to see your original logs with all the rl variables

Why can't you post the log? try zipping it if it is too big.
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« Reply #19 on: June 09, 2016, 01:37:55 PM »

Log zipped here
Ill check my defined map on winols about Q2.

I started using an xdf found in here, assumed it would be correct
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nyet
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« Reply #20 on: June 09, 2016, 01:47:35 PM »

Is it possible your MAF is scaled wrong? Your actual load should not be that much higher than spec.

Also, can you log mrfa, mimax, mibas and ps_w?

thanks Smiley
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« Reply #21 on: June 09, 2016, 02:03:08 PM »

Maf is stock. Although i dont have an airbox and have a cone filter.

Mrfa_w is in the log, i can do ps_w but i dont have the ram locations for the other two.  Sad

Thanks for pointing out Q2. Address steps were out

looks more like a map










« Last Edit: June 09, 2016, 02:06:19 PM by Tshirt2k » Logged
nyet
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« Reply #22 on: June 09, 2016, 02:07:16 PM »

Maf is stock. Although i dont have an airbox and have a cone filter.

Mrfa_w is in the log, i can do ps_w but i dont have the ram locations for the other two.  Sad

If you can get somebody to find them it would be helpful (they'd have to do some disassembly work though).

ps_w might help us figure out why your load is so high. The cone filter may be interfering some with the MAF signal, but the difference you're seeing is pretty significant.
« Last Edit: June 09, 2016, 02:09:13 PM by nyet » Logged

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nyet
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« Reply #23 on: June 09, 2016, 02:10:27 PM »

Also, that Q2 still looks very suspicious; the highest numbers in the map should correspond to more or less just before peak boost...
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« Reply #24 on: June 09, 2016, 02:18:01 PM »

The Q2 is now the same as the stock file. 225 TT i've compare with a few files i have
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nyet
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« Reply #25 on: June 09, 2016, 02:20:05 PM »

The Q2 is now the same as the stock file. 225 TT i've compare with a few files i have

In that case, it will need a lot of work.

Shift the entire thing up 1000 or 1500 rpm, and try to smooth out the rest behind it so its symmetric. (3d view might be most helpful here).
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« Reply #26 on: June 11, 2016, 10:26:11 AM »

In that case, it will need a lot of work.

Shift the entire thing up 1000 or 1500 rpm, and try to smooth out the rest behind it so its symmetric. (3d view might be most helpful here).

I have done this, Not flashed it on yet.

In the mean time i have logged ps_w
« Last Edit: June 12, 2016, 05:58:19 AM by Tshirt2k » Logged
Tshirt2k
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« Reply #27 on: June 12, 2016, 07:26:43 AM »

Looking at ps_w, seems like the maf need scaling down. Is this done In MLHFM or is there another cause?

It is the standard housing, The wiki seems to cover larger housings, not the standard one.
« Last Edit: June 12, 2016, 12:33:15 PM by Tshirt2k » Logged
nyet
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« Reply #28 on: June 12, 2016, 10:22:02 PM »

Looking at ps_w, seems like the maf need scaling down. Is this done In MLHFM or is there another cause?

It is the standard housing, The wiki seems to cover larger housings, not the standard one.

Not clear why your setup is reading high; any chance you can just try a stock airbox/intake?
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Please do not ask me for tunes. I'm here to help people make their own.

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Tshirt2k
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« Reply #29 on: June 13, 2016, 01:30:41 AM »

Not really, there's no room.  Huh

« Last Edit: June 13, 2016, 01:45:49 AM by Tshirt2k » Logged
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