[alxvlkr]

Hi everyone,

i recently got my dme unlocked by femto and afterwards flashed a ots mhd map + xhp.

Currently im running MHD Stage 1 (98RON) with 100RON fuel and xhp Stage 2. When doing a wot pull, I often get up to -3 degrees timing correction on a few cylinders.

The car is a 23' M240i G42 with around 20000km and on its first set of spark plugs and ignition coils. I also got a high flow air filter mat and a bigger turbo inlet installed.

Should i change the spark plugs or the coils to get no corrections?
Or what else can i do?

Logs:
https://datazap.me/u/alxvlkr/b58tu-r...?log=0&data=13
(two charts)

https://datazap.me/u/alxvlkr/b58tu-r...0?log=0&data=8
(one chart, made earlier with less parameters)

https://datazap.me/u/alxvlkr/b58tu-r...2?log=0&data=8
(one chart, made earlier with less parameters)

Best regards,
Alex

[Rdurty2]

It’s not going to be caused by your plugs or coils. 20k is still “new” for those.

Put in some e85 and see if the timing cleans up.

[alxvlkr]

Unfortunately e85 isn't available in germany.

I went for 102RON gas and the corrections are almost completely gone on the 98RON map.

But when trying the 102RON map... ohhh hell no, -4,5 degree and more on all cylinders.

I guess i need to order a eca as well and mix my own ethanol blend.

[Rdurty2]

So basically your gas sucks. Either need to keep the octane up, change your tune to use a lower octane, or get a tune that is a bit more mild.

Could always try a different gas station. Also keep in mind that even the stock tune will have some timing corrections.