NefMoto

Hey guys, not too long ago my old lambda sensor died and when the car was cold (I assume over-fuelling from lack of lambda and also warm up enrichment). It used to bang when changing gear after a hard acceleration.

I'm trying to figure out the best way to achieve this in my first tune. I have read that: Adjusting KFZWMN to -37.5 at 0-30% load, 1480+rpm. Is the way to go but I'm a little confused.

Is this a timing map just for over run? As I don't understand, to me it seems like overrun is less than 30% load and if your over 1480 rpm it will bang when you lift off. But what happens if I'm requesting 0-30% load above 1480 rpm when just cruising?

I just wanted to add this. I know a lot of people achieve pops and bangs with fuel cut, and twin it with launch control for a make shift anti lag. This is not what I want, I don't have forged rods for starters. I just want it to bang as I change from high revs into the next gear to keep a little spool, and for the big kid in me lol. Therefore I though delayed ignition timing would be the easiest and best way for my application.
 
Car has a 3" decat downpipe and only 1 single resonator, so it already gurgles :P

search the forum, there is a 30+ page thread about this.

http://nefariousmotorsports.com/forum/index.php?action=printpage;topic=7174.0

You mean this one? that has about 10 people doing 10 different methods, getting 10 different results? And goes off topic every other post?

"Quote" KFNWEGM is like a threshold for fuelcut. When rpms drop, fuelcut is disabled from this value downwards. So if you want gargles and pops for the entire rpm range and all gears, set it higher than your rpm limit for example.

KFTVSA is the time in seconds i think before fuelcut is activated. But its active only when clutch is depressed. At least thats how ive seen it work on Volvos.

If you want bangs between shifts, lower KFZWMN in the lower load parts. "Quote"

some people say use KFZWMN, some say just use KFZW. and I'm not sure if I need fuel cut if I just want it when shifting at high rpm.

From what I'm reading, I can use KFNWEGM between say 4000-6000 rpm to get the fuel I need, but I'm looking for clarification on KFZWMN, I understand that a negative value in the low load points above a set rpm will delay ignition timing to get some unburned fuel into the exhaust, but wont I be running negative timing in these load points when cruising? surely you can be in the 0-30% load points above 1480 rpm very often? Am I safer only adjusting these load points above 3k where I'd likely never be at 0-30% load. Or am I miles off here? Sorry I'm trying to understand the concept.

*Edit* I think I've had my eureka moment, I opened up KFZWMN and there are a lot of negative numbers in these load points already. So this is a minimum ignition angle map. Makes sense now, I assume it uses this map on overrun. I also don't need to touch CWSAWE, this is great for me as I'll only get the effects of no fuel cut when I want it, after clutching to gear up.

It looks like I'm just going to have to experiment with KFZWMN. I don't have a fuel cut map. I guess I'll start in the higher rpm points at 0-30% load, and bring in the changes lower and lower until I'm happy.

*Update* Edited the first two load lines of KFZWMN to -20 at 3k rpm tapering to -30 at red line. Edited KFZWOP at the first two load lines, decreased original values by 20 from 3k rpm to redline. I'll let you know how it went in the next day or two when I upload my first tune. Logs to come :P.

Bit of an update for everyone. I put my remap one the car and all is good, it burbles on overrun and I get the odd bang in second and third with just changing KFZMOP and KFZMWM. I'm looking at playing around with KFTVSA to get some extra fuel on over run but I'm a little confused bout the axis.

-20.25
-4.50
20.25
60.00
80.25
Is this a temperature axis?

yes

with my awp i noticed that just by changing the latest possible igniton timing map would ~85% of the time get me a nice flame out of the tailpipe after a hard rev and shift... not no lift shift, just after revving it out a little. it happened more often when i started to floor it in gear down low for example doing 30mph in 3rd and flooring to 5500 rpm. once the revs dropped a few hundred on a dark night i could see the orange flash in my side mirror.

best way is to just keep playing around with it
im curious to see how you make yours turn out when you are satisfied

I've added 2.55 seconds of delay to the 80 line of KFTVSA at 3k and 4k and 1.75 seconds delay at 5k and 6k.

-40 in KFZMWM at the two lowest load points above 3k rpm and I believe -30 in OP the lowest 2 load points above 3k and -20 in the third from lowest load point. I believe 30%.

Its working ok and I get burbles all the time and the odd pop if I lift off just above 3k. I have read that on overrun it usually follows OP but I might have to tweak the normal KFZW maps to see if it actually does. I'm happy as I get regular single pops after a hard acceleration when changing gear. Which is what I wanted. But now I'm going to try and get louder, multiple pops. And maybe look into antilag. Not the real one. Just a few pops in neutral for showing off Haha.

All in all pretty happy and thanks everyone for the help :)

iirc i  think i did -10 degrees in one of the kfzw maps and let me tell you lol. downshifts are nasty

I'll give it a go. Is it possible to get a hard cut limiter working on the me7.5? it's the HN 0001 ecu, I've been reading through this topic.

http://nefariousmotorsports.com/forum/index.php?topic=11664.90

But I don't have KFTSRL or FTOMN.
Also my KFSZT had 2 completely different AXIS to the one on the other topic.

Would adding a soft limiter at this stage just double as the hard cut? Or can't I do it with my ECU?

Why you didn't post it in that tread?

Because it's an old dead thread. And this is a thread I created in Noob Questions labelled "Me7.5 Pops & Bangs" I'd assume it's better to post here in an active thread with an active following rather than try and revive an old thread.

Oh sorry I didn't notice it is you tread, i apologize for that.
How do you think you don't have KFTSRL and FTOMN?
What is you ECU number

06A032032HN 0001

I don't know if my .xdf is just not defined for these files or my ECU just doesn't have these functions.

No sign of KFTSRL or FTOMN and I found that when attempting the pops and bangs on over run last week that I don't have the KFNWEGM fuel cut threshold map. It's a shame as I know KFNWEGM would give me some insane multiple pops rather than relying on KFTVSA max values of 2.55 seconds delay to do all the work for the extra fuel.


Edit: Am I right in thinking that these maps do exist in my ECU but are not defined in my .xdf?

Hehehe friend your ecu have all that maps but you must find them. Post your bin and xdf I will find it

Thanks. I'll upload the stock bin and .xdf off my laptop tomorrow. Had a very eventful day. I ended up with -40 in kfzwmn and -30 to -40 in kfzw and kfzwop ramping up to redline. I also brought in lamfa a little more aggressively and ramped up the boost at 2.5-4.5k with a peak of 1.1bar(16psi) at 3.5k. All I can say is WOW. Also got my triple pop on overrun so I'm happy. Just hard cut to go now and some logs to come :)

Stock .bin and .xdf attached. I need:

KFTSRL
FTOMIN
KFTWEGM

Thanks in advance.

*edit* hope it's not too late. I also don't have cwsawe. Its clutch position for something. Not sure if I'll need it but the more the better in my XDF I guess

i believe i got this xdf off of one of the threads a while back here on ye 'ol nefmoto. search is your best friend
make sure your numbers match up though

Here you go
I don't know what is KFTWEGM

BlackT your an absolute legend! +K Thank you. Just a quick question. I need to modify the 5000 rpm axis to 5960. Can I just change it in Tunerpro, or do I need to do it in the XDF? And can I just modify this one rpm entry in this one table. Or do I have to modify every 5000 rpm axis in the entire ecu?

I've just been through the xdf, then I went into TunerPro and at the bottom there are 2 extra tables called New Table, these appear to be the axis tables for KFTSRL and KFSZT, They have the same axis so name doesn't matter. Am I right in thinking I can just edit these tables from 5k to 5960?

You have in xdf 'new table'  one is for KFSZT other is for KFTSRL
But read this topic few times please
http://nefariousmotorsports.com/forum/index.php?topic=11664.0
So you can understand what are you doing

Thanks dude. I just got the axis edit to work so I'll name the files for the correct counterparts now. I'd like my hard cut to be around 4.5k but I might have to have it higher as it seems it has to be pretty close to redline to work, otherwise your upper limit cuts throttle really late which I assume is worse than just having the hard cut set higher and getting throttle cut sooner. I'll keep you all updated. Should also be easier to get a video of the hard cut, need a camera man for the overrun pops haha.

Just to confirm, with KFTSRL the RPM is on the Y Axis but with KFSZT, RPM is on the X Axis. Is that just how it is? Just in case it's not right. I'm not doubting your work, just want to confirm before I flash over the changes.

Sorry for the multiple posts. I could not edit a post to add an attachment.

That depends who make maps. Please learn more about finding maps. And what they represents.

And yes that is okay

It worked, I'll upload a video later. I just have one question though. I set the hard cut to 6000 and my upper limiters to 6500. I thought it would only do it when not moving as I set VNMAX to 1.25/kmh but when I was rolling and I put the clutch in it still worked when I revved it up. Does it also work with the clutch in or have I gone wrong somewhere? I'm worried it's going to kick in when i hit 6k rpm while driving along. And my plan is to try and lower it to around 4-4.5k and set NMAX to 5k and NMAXOG to desired redline 6.5k but I don't want the hard cut to come in at 4.5k every time I reach it.

The thing you want to do is whole diffrent story, you want Launch control witch clutch. And that is serious job. You need to learn a lot more about programing, if you can't find maps, don't even try to add launch control. I don't underestimate you, but you need to do more learning

I get it mate. Thanks. I'll just set the anti lag higher and stay out of it haha. I went out and hit the hard cut at 6k in 3rd gear, put a smile on my face anyway.

Car is going really well. I raised the hardcut limiter to 6800 so I don't activate it until I want to. Raised up the boost a little and I set TLAFA to 0 so I don't have to be as generous with target AFR in LAMFA. I've had a look through my .bin and I can't find ZKLAMFAW/ZKWLAFWL (0x1C3EE) - time constant for driver requested lambda filtering. Would you mind finding it for me dude? I'll learn how to do .xdf updates soon but I figure it's a pretty important map for fine tuning my stage 2 map. Rather than just relying on TLAFA and an aggressive LAMFA at 3-5k rpm.

What is ZKWLAFWL?
What metod do you use to find maps?

It seems that my ECU is on the less popular side as there was only like 1 xdf available and it's not very complete. So I have no way to find a map that isn't defined.

Could you try and find  ZKLAMFAW for me and add it to the xdf?

I'm currently setting everything up to log the car, figured I'd get myself a feeler gauge to gap the new plugs before some 3rd gear pulls. No doubt I will be back later with some n00b questions about EcuxPlot and how to interpret the data haha.

I already find that map, but you can't yust wait to someone else do your work. This is a DIY forum, so you will must put more work.
Once you find map you are looking for, I can only confirm you
https://www.youtube.com/watch?v=nKSe1fPbTlA&t=419s

Oh right, I assumed that the .xdf's were made by people at a much higher level. Are you saying there are guides on how to find and define maps in the .xdf like you did the other day?

Exactly

Just had a look through and all I can find is making a .xdf with winols on a youtube video. I've opened up the .xdf and it looks way out of my league atm. I'm just going to focus on the logging for now and probably request an updated .xdf once I've found a list of maps required. I'll post up the updated one for future members to use.

I'm guessing I could find the map in another .xdf and just copy the table into my .xdf but I'm worried about messing up if the values/offsets aren't the same or if I clip a line of a previous table and mess things up.

.XDF is tunerpro - .OLS is winols

Hi,

Is it possible to have pops&bangs siwtch on/off via cruise control switch? I searched for cc switch addresses but cannot find them.

search harder