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Melch Melch is offline
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Car: 2016 BMW M3
Default Log Check - E25 and Throttle %? - 04-18-2019, 01:40 PM

I only have 91 octane around here, so I've been running Map 3 for a while. I hooked up the fuel sensor and decided to throw in 3 gallons of E85, and do a few pulls with Map 2.

- Trims spiked during spool up, but quickly got back on track. Is this anything I should be concerned with? AFRs seemed slightly lean, but about right from others I've seen (and DI engines)
- Throttle %, I know the engine is doing load control using the throttle, and seeing fluctuations between ~85-95% seems typical. However, mine is fluctuation from as low as 63% to as high as 95%. Is this something I should concerned with? Possible underlying issues? I've seen others logs where throttle is 100% at times.
- This map feels less torquey around town, have others notice boost possibly not as responsive? Could just be a placebo.

Any other feedback?
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File Type: csv 2019-04-14 10_55_21_Map-2.csv (30.7 KB, 48 views)
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Terry @ BMS's Avatar
Terry @ BMS Terry @ BMS is online now
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Default 04-21-2019, 10:00 AM

Log looks good to me.

Manifold boost matches chargepipe boost so throttle isn't closing here. It's oversized and used to regulate boost to target. A lot of the logs you see might have our BEF where we reprogram it's logic just to clean up the logs.

Trims look fine. Peak torque is shifted up with higher boost targets but at no point will it make less torque than stock.
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Melch Melch is offline
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Default 04-22-2019, 11:16 AM

Thanks for taking a close look at my logs Terry. I didn’t realize Boost_2 is manifold pressure, that may come in handy down the road for troubleshooting.
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