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Author Topic: CF Timing about.  (Read 20769 times)
AndiS4
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« Reply #15 on: June 27, 2012, 12:34:34 AM »

 I think, if you have the cf´s high, with scaling the axis like this without changing the ign angle, you will get more probs.

I would have taken at least the same vales for the same load as before and for the 12ish load, build a complete new retarded ign. angle row.

There you could log and test if this worked, without any danger.
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@lq!
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« Reply #16 on: June 27, 2012, 04:01:43 AM »

when you change axis values.. yes, you will have a more probs... but against values higher than original values..

Can you please look at my attachment. @ 6ms engine load x 5000rpm.. Old ignition angel = 29.25 new ignition angel is 36 !!
Automatically i will see advanced timing all over the place...approximately 7 degrees  Shocked

But lastest maximum engine load values same as original KFZW.i think we should be reduced middle load rpm timing area.. i'm not sure for this changes...

Do you have tried this before on motronic m38x ?
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AndiS4
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« Reply #17 on: June 27, 2012, 04:07:54 AM »

Oh, correction:

This is what I meant.

By changing the axis data, the ignition will be much too advanced.

You have to change / bring them into the right place again...

So you should divide all values through 1.2, and then you should be at the same level as before.
After that you change the timig after you logged again, if necessary.

@ all others, correct me if im wrong. Didnt try this yet Cheesy
« Last Edit: June 27, 2012, 04:15:23 AM by AndiS4 » Logged
prj
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« Reply #18 on: June 27, 2012, 04:45:15 AM »

So you should divide all values through 1.2

Pro tuning Tongue

Sorry, I just found it funny. I think a bit more work needs to be done than this Smiley
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AndiS4
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« Reply #19 on: June 27, 2012, 05:13:14 AM »

I didnt say it would solve all his probs with cf.

But after changing axis, he will get by doing this, to the point he was before.
But with the advantage, to have a better resolution.

Or do you mean, that axis changing generally doesnt work on here?

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@lq!
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« Reply #20 on: June 27, 2012, 05:23:40 AM »

Pro tuning Tongue

Sorry, I just found it funny. I think a bit more work needs to be done than this Smiley

@PRJ

Could you please tell us ? how can we change this map ?
« Last Edit: June 27, 2012, 05:34:26 AM by @lq! » Logged
prj
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« Reply #21 on: June 27, 2012, 05:35:04 AM »

How you can change these maps?

Buy this:
http://www.amazon.com/Induction-Performance-Practical-Supercharging-Turbocharging/dp/1859606911

And this:
http://www.amazon.com/Designing-Tuning-High-Performance-Injection-Systems/dp/1932494901

Read both, understand them, then you will probably have an idea of how to do things.
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pvl
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« Reply #22 on: June 27, 2012, 05:41:45 AM »

Hi PRJ,

Reading your posts, gives me the idea that your have worked on this kinda ecu before.

I have a small question related to the topic.

Is it correct that this map (screenshot) is responsible for the main/fullthrottle ingition and needs (also)tuning to sort the issue ?

Thanks for your efford,

Cheers,

PvL
« Last Edit: June 27, 2012, 05:43:19 AM by pvl » Logged
ibizacupra
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« Reply #23 on: June 29, 2012, 03:32:07 AM »

your load axis looks very different to what I see..
sure its right?
I have 10-150 on a 150bhp AUM Golf engine in comparison
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@lq!
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« Reply #24 on: June 29, 2012, 03:38:05 AM »

it's motronic 38x my friend. not me7x
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prj
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« Reply #25 on: June 30, 2012, 01:12:53 AM »

Hi PRJ,

Reading your posts, gives me the idea that your have worked on this kinda ecu before.

I have a small question related to the topic.

Is it correct that this map (screenshot) is responsible for the main/fullthrottle ingition and needs (also)tuning to sort the issue ?

Thanks for your efford,

Cheers,

PvL

If only I could remember. I tuned this long ago and I was finding the maps by hand without DAMOS.
But M3.x is very similar to old Motronic (M2.x, M1.x) the main difference is that it has a 16 bit MCU.
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Rick
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« Reply #26 on: June 30, 2012, 06:31:05 AM »

Hi PRJ,

Reading your posts, gives me the idea that your have worked on this kinda ecu before.

I have a small question related to the topic.

Is it correct that this map (screenshot) is responsible for the main/fullthrottle ingition and needs (also)tuning to sort the issue ?

Thanks for your efford,

Cheers,

PvL


Yes, that is the correct map for ignition angle, there are probably one or two more next to it that should be tuned initially to see which one responds.  You shouldn't be changing the load axis unless you are exceeding 10ms/stroke of load.

Rick
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