A quick and easy way to street tune your CSL conversion for drivability.

[heinzboehmer]

Also I did the logging as author suggested, after a good long drive my log wasn't that far off (1-5%) but the problem that I can't save Density map with decimals, it would only allow me to save if round the numbers. Is that normal? In author video he shows saving with decimal values

Change the type from int to float. I think I posted up more details in one of my earlier posts.

[Bry5on]

You want the compensation at higher loads all the time. If you zero the whole map, you will not get enough fuel until you do a full retune again. The map has no effect whatsoever where the cells are zero. Zeroing that map will only make your life harder! Looks like yours is running with the correct amount of fuel pretty much everywhere, although I’m surprised that solved your bucking issues.

[Simas306]

So I did a run with flaps turned open all the time and most the bucking I had in 2-3k rpm is gone, the flap comp map is mostly 0 but I still wonder if it worth trying to make it all 0? As it would still compensate



Also I did the logging as author suggested, after a good long drive my log wasn't that far off (1-5%) but the problem that I can't save Density map with decimals, it would only allow me to save if round the numbers. Is that normal? In author video he shows saving with decimal values

[Bry5on]

If you set the flaps to always open in both comfort and sport, that will keep the enrichment settings on at all times, which is probably what you want since you’re essentially running open flap at all times.

[heinzboehmer]

Can someone tell me which table is for disabling flaps enrichment? I did comfort and sport to make them always open

If you use the xdf linked in the video from the first post, it's called "Density Correction_VOLUMETRIC EFFICIENCY (RF) - CSL FLAP COMP".

[Simas306]

Can someone tell me which table is for disabling flaps enrichment? I did comfort and sport to make them always open

[pnvhome]

Additional
On first table was problems on full throttle in 2000-3000 rpm and send error on lambda-2 before cat, now everything is absolutely smooth. I think that 100 numbers no need for change they are works perfect and on logging almost every time shows adapations - 1
Also i reset engine adaptations via BmwLogger, don't remember where i download it, it also can reset errors. Because INPA don't want to make it properly

[Nezb]

I think the adaption reset can be done with INPA. There is an option to do it at least. I hope it will work. Its kinda strange, my INPA works but I cannot read fault codes. INPA crashes. As far as I remember there is a problem with the full CSL .bin from Paffy which resulted in exactly that problem. The file from Terra, which I use, should fix that but something is still wrong.

[Nezb]

Nice thread!

Could somebody give some more information about what the adaptation does? Set K_LAA_TMOT_MIN to high temperature like 200°C before logging? Heinzboehmer wrote to reset adaption after flashing. How does that work? Edit: Set K_LAA_TMOT_MIN is correct and I have found the adaption reset function in INPA.

A question regarding vanos before I do the logging. Do you all leave the vanos maps (not the offset but the maps KF_EVAN1_SOLL & KF_AVAN1_SOLL) from the csl as is? Would it make sense to copy the values from stock e46 m3 over?

Thank you people for sharing your wisdom!

[discoelk]

f you car had no jerkiness with std CSL tune, I would assume your exhaust setup is a bit worse that oem Euro exhaust in that particular area.
Because the jerkiness comes from my expierence mostly from lean spots, where you have to add fuel with stock cams compared to CSL ones.
Less restriction or just increased diameter exhaust is not what a stock s54 needs (in terms of torque curve) They are very sensitive to this and the oem exhaust is very well designed imo. Of course not everyone's taste in terms of sound.

Maybe possible but who cares. Part throttle power (torque really) isn't a noticable thing when driving unless It creates abrupt changes during transitions. It may help fuel efficiency slightly. The fact that I'm close to stoich, maybe even a little lean near full opening, tells me I'm probably pretty damn close near WOT. I need to get my wideband set up and tune the full load next. I may copy Bry5on and blend the vanos tables also.

Related info, initially I was running this header and section 1 with stock 2, and 3 but changed to a SS x pipe in section 2 in pursuit of a different exhaust sound. This was tuned with that setup. I've been thinking about changing back so it will be interesting to see if it's drastically different for part load.

[HARBER07]

What are we calling the cold map?. I've given this a go and got things pretty dialled in everywhere else but the warm up tune needs a tweak for sure.

[S54B32]

Frist off, thanks to everyone who worked on this. I have done similar part throttle tuning in other applications but always wondered if it were possible to do for the S54 with more or less "free" software.

Interestingly my car didn't need many changes. I always thought it ran well without any of the jerkiness that is commonly reported with the CSL tune. My set-up is slighly different than Bry5on and heinzboehmer. I'm running the Karb race box and megan headers with a homebuilt catted 2.5in section 2. Guessing this is related to better airflow with the SS headers or perhaps a more refreshed fuel system. New pump and filter within the last 1000 miles.

I logged for around 20-30 minutes and tried to vary load and hit as many engine speeds as I could. A bigger dataset would certainly work better. Next step is to get more data and set-up my wideband for WOT fueling.

f you car had no jerkiness with std CSL tune, I would assume your exhaust setup is a bit worse that oem Euro exhaust in that particular area.
Because the jerkiness comes from my expierence mostly from lean spots, where you have to add fuel with stock cams compared to CSL ones.
Less restriction or just increased diameter exhaust is not what a stock s54 needs (in terms of torque curve) They are very sensitive to this and the oem exhaust is very well designed imo. Of course not everyone's taste in terms of sound.

[pnvhome]

Finally changed sparks and oil and made about 1,30 hour run
Comparsion to stock CSL

[discoelk]

For the record, here’s the difference between the default CSL tune and the 5 runs in version using this method on my car. Super clever, thank you for sharing!

Frist off, thanks to everyone who worked on this. I have done similar part throttle tuning in other applications but always wondered if it were possible to do for the S54 with more or less "free" software.

Interestingly my car didn't need many changes. I always thought it ran well without any of the jerkiness that is commonly reported with the CSL tune. My set-up is slighly different than Bry5on and heinzboehmer. I'm running the Karb race box and megan headers with a homebuilt catted 2.5in section 2. Guessing this is related to better airflow with the SS headers or perhaps a more refreshed fuel system. New pump and filter within the last 1000 miles.

I logged for around 20-30 minutes and tried to vary load and hit as many engine speeds as I could. A bigger dataset would certainly work better. Next step is to get more data and set-up my wideband for WOT fueling.

[ac427]

Pavlo Thank you for this excellent work.

I think a lot of CSL owners used to remove the CSL flap disc from the airbox snorkel because the opening mechanism was unreliable.

So without the flap i guess the car is being under fuelled below 3000 RPM ?

I have the CSL airbox and camshafts in my car and i definitely have a dip when trying to pull away normally.

Is the CSL flap always open in Sport mode and would therefore not effect the fuelling?