[DreamerJoe]

Originally Posted by BMW335l

https://datazap.me/u/bmw335ie92/log-...37-38-39-40-41
Here are the datazap logs.

So boost is on point, that was my mis-read from not being used to bm3 layout, everything looks on point besides those timing corrections. Idk which region you’re from, but might want to up your e85 a bit

[BMW335l]

Originally Posted by DreamerJoe

So boost is on point, that was my mis-read from not being used to bm3 layout, everything looks on point besides those timing corrections. Idk which region you’re from, but might want to up your e85 a bit

Yeah, cyl 1 definitely has to much correction. Weirdly enough, the car runs much worse then the logs indicate. Feels more like -6 to -8 on all cyl.
I will do a re flash, add some more E and then do another run. I'm located in Sweden, and our fuel is known to be bad. But that doesn't really explain why my stage 1 tune with less E runs better. Maybe higher boost/lower timings.

I'm thankful for any other suggestions.

[DieselDuck]

Originally Posted by aataylor18

What steps would you take in this scenario? I guess run out the tank, reset adaptations, check plug gap. I flashed back to stock. Kind of at a loss. I'm afraid to even do pulls if it's that dangerous.

Yeah as you say, flash stock, use stock gap, check for any fault codes, and do a log while stock. Start from there

[SimonO]

So I had a couple of runs on one of the UK's most conservative dynos at the weekend. First run was MHD Stage 2 HPFP 95 Ron; second run was MHD Stage 2 HPFP 98 Ron. Tesco Momentum 99 Ron fuel was used in both runs and with no ethanol. Only hardware modifications were a 4.5" 200 cell downpipe and TU HPFP.

See both logs below and accompanying chart. Hopefully this might be useful but comments would be welcomed! Note how things seem to plataeu a little early on the 98 Ron map, around 5200rpm? I'm undecided if I should just run the 95 Ron map in the longer term or add ethanol on the 98 Ron. This car is my daily driver and I'm not sure if I want to be adding an extra £15 per tank when the benefit isn't actually that much?

There was an M140i there too with the exact same MHD map, same fuel, same TU HPFP but had a 4.5" decat, rather than 200 cell. His peak power was 456 bhp. His graph looked identical to mine in every way. I have seen his logs too and they are very similar, albeit with slightly worse timing corrections.

Dyno chart is flywheel figures.


https://datazap.me/u/simonocr/2024-0...og=0&data=3-17

https://datazap.me/u/simonocr/2024-0...0&data=3-17-43