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Author Topic: Ignition cut rev limiter me7  (Read 9662 times)
Gaghunfv2
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« Reply #75 on: August 11, 2017, 01:02:48 PM »

Thanks, now I understand.
0 means the ignition coil doesn't "load" anymore. So if it doesn't load anymore it limits the rpm in the specified row.  Cheesy
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adam-
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« Reply #76 on: August 12, 2017, 10:44:47 AM »

Mhmmmmm.
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RBPE
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« Reply #77 on: September 05, 2017, 12:54:58 PM »

Thanks RBPE! This makes sense. Smiley

=> But why is the closing time not 0 by default? I thought a good spark is good for the engine?
=> Why would a long closing time overheat the ignition coil? Longer time => Coil doesn't need to hold that much power => colder coil and a lighter spark??
=> Editing the "closing time"-maps lead to a faster ignition cut, am I right? If not editing them, the ignition cut would be a "long/slow bounce", am I right?
=> What map/value defines the ignition cut?

Thanks for the recommendation, but I know how it works.
I repaired oldtimer motorcycles (mostly 2 strokes) for a few years. Smiley

It's all just relative - if Bosch have a known quantity, for example the bit at the beginning here that states 2ms, then you have a set known quantity, you can then work from that with various offsets and variables based on this known figure and elaborate on the variables to your hearts content and that's all Bosch do, continue to break it down and as such evolve the systems as a further breakdown of known/set figures. It's just maths and logic, that's all an ecu can do, I've highlighted some bits in the download file to give you an idea in red; the "offset", "function off", "gradient" type of bits;

http://nefariousmotorsports.com/forum/index.php?topic=10419.0title=
« Last Edit: September 05, 2017, 12:59:14 PM by RBPE » Logged
4ringpieces
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« Reply #78 on: September 05, 2017, 02:04:35 PM »

No charge time No spark. Works amazing on old z20lets Roll Eyes
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HelperD
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« Reply #79 on: September 06, 2017, 07:06:51 AM »

I have had good luck with just using KFTSRL.  Never had to touch KFSZT but I suppose I will give it a try now after reading up on it.

D
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Gaghunfv2
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« Reply #80 on: September 16, 2017, 04:43:35 AM »

This is my 1.8T now, still with original DP and Cat. Grin

https://www.youtube.com/watch?v=cND_j_2ihNQ

Changes:
KFSZT
=> 0'ed the last row (6000 rpm, I think it's enought)
=> Set next-to-last row to 5960

KFTSRL
=> 0'ed the last row (6000 rpm
=> Set next-to-last row to 5960

NMAX + NMAXOG
=> 6200 rpm

FTOMN
=> 0

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KasperH
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« Reply #81 on: September 16, 2017, 05:11:07 AM »

This is my 1.8T now, still with original DP and Cat. Grin

https://www.youtube.com/watch?v=cND_j_2ihNQ

Changes:
KFSZT
=> 0'ed the last row (6000 rpm, I think it's enought)
=> Set next-to-last row to 5960

KFTSRL
=> 0'ed the last row (6000 rpm
=> Set next-to-last row to 5960

NMAX + NMAXOG
=> 6200 rpm

FTOMN
=> 0



Exactly what I did, and it's fun as hell  Grin
But with cat in place it'll take some serious damage.
Decat and you'll be spitting flames all day and won't have to worry
about the cat melting and plugging up the exhaust Smiley
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RBPE
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« Reply #82 on: September 18, 2017, 01:25:04 PM »

I've been digging out and rebuilding some files lately and uploaded some ignition patent info if it helps on this, various years I think; makes it easier for me to find!  Wink

https://app.box.com/s/7uqaix0y9c9z59g7722dr7z54q8f5k4u

https://app.box.com/s/4wt0gxgvyu3bklxa1g0fxopummwnogc3

https://app.box.com/s/08g950lz8gg9o1w01hlt7rj01wo0zhj9

https://app.box.com/s/kjw5zi30k4bbbm2yawpcdigl9p8rwbtv

https://app.box.com/s/lgvp59z16vrr90l2qbbfodm91mep6h9s

https://app.box.com/s/7j1jcahdo4yvxoz5e5n52begxhejz16z

https://app.box.com/s/hxj7kqpfiwqp7q8n7delntx7nlcxn97n

https://app.box.com/s/xgs2vl4bun9ldvl3gscfsijgig4gpjgk

https://app.box.com/s/lr5yx98l0j8az3xb1d94mgik2t7s2p6t

https://app.box.com/s/mgalngtwdggjwj9ciy08yachlvtz4zvw
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Gaghunfv2
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« Reply #83 on: September 20, 2017, 04:11:22 AM »

Small question here.
My Golf 4 accelerates like shit with this changes (small stuttering).

But why?
=> Maybe a ignition coil is half-blown?
=> Maybe it's because FTOMN = 0 ?

When flashing the stock maps the car runs fine.
My spark plugs are brand new.

By the way:
My remap contains some other small changes, but not much (a little bit KFZW(2), KFMIRL, LDRXN, KFLDHBN, KFMIOP, LAMFA). For safety I use 98oz fuel.
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KasperH
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« Reply #84 on: September 20, 2017, 04:17:21 AM »

Small question here.
My Golf 4 accelerates like shit with this changes (small stuttering).

But why?
=> Maybe a ignition coil is half-blown?
=> Maybe it's because FTOMN = 0 ?

When flashing the stock maps the car runs fine.
My spark plugs are brand new.

By the way:
My remap contains some other small changes, but not much (a little bit KFZW(2), KFMIRL, LDRXN, KFLDHBN, KFMIOP, LAMFA). For safety I use 98oz fuel.


On wot acceleration or part throttle?
Could be coils, could also be plugs themselves.

Do you have any logs of it happening?
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Gaghunfv2
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« Reply #85 on: September 20, 2017, 04:21:14 AM »

You can feel it the most at part throttle (3rd gear, 3200 rpm).
I can feel it at wot too, but not much. I will make a log this afternoon and attach it.
Error memory is empty.

I think FTOMN = 0 is the fault, what do you think?

Edit: I even found out (thanks to boost gauge), that the boost "bounces" hardly at low rpm (maybe because a faulty combustion?), full throttle works fine.  Huh
« Last Edit: September 20, 2017, 04:26:14 AM by Gaghunfv2 » Logged

KasperH
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« Reply #86 on: September 20, 2017, 04:56:53 AM »

You can feel it the most at part throttle (3rd gear, 3200 rpm).
I can feel it at wot too, but not much. I will make a log this afternoon and attach it.
Error memory is empty.

I think FTOMN = 0 is the fault, what do you think?

Edit: I even found out (thanks to boost gauge), that the boost "bounces" hardly at low rpm (maybe because a faulty combustion?), full throttle works fine.  Huh

I don't think that 0 dwell time is the culprit.
Sounds more like misfire.
Anyway it's easier to pinpoint with logs Smiley
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4ringpieces
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« Reply #87 on: September 20, 2017, 05:51:13 AM »

Misfires Or piss poor kfmirl and kfmiop tables
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KasperH
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« Reply #88 on: September 20, 2017, 06:29:58 AM »

Or piss poor kfmirl and kfmiop tables

Yeah, forgot to ask what changes you made to IRL and IOP?
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Gaghunfv2
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« Reply #89 on: September 20, 2017, 09:09:41 AM »

I've found the issue. Cheesy

My LAMFA was too low at full load (0,82). I increased KFZW(2), which leaded to prefire (sorry for my english).
But hey, you learn by your mistakes...  Grin

An Mod can delete my posts so others aren't getting confused.
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