07-14-2021, 06:45 AM | #1 |
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B58 Tuning and Fueling Discussion
This thread is dedicated to discuss anything related to the B58 tuning and fueling options.
For a start here's what the 340i/440i Standard and MPPSK stock tunes look like through the RPM range in the tables below. Basically when you floor the gas pedal those are the torque numbers (in NM) the tune requests the DME to achieve through the RPM range. The DME then calculates how much Load/Boost required to achieve the Torque Requested tables below. Our DMEs uses torque to make it's calculations, to convert those numbers to HP either convert NM to lb-ft X RPM and divide by 5252 or directly multiply those numbers X RPM and divide by 7120.
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2018 340i 8AT RWD - M Sport - Catless MPPSK - Stock Turbo - Stock HPFP
-------- Tunes: Self Made Tunes - MHD ------ Fuel: 92RON/87OCT -------- Last edited by IMS-340C; 04-16-2022 at 03:36 AM.. |
07-22-2021, 06:40 AM | #2 |
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Downpipe no tune
I'm trying to not void my warranty, wondering if adding a charge pipe and down pipe is possible without a tune? Im assuming the tune would definitely void the warranty. Any feedback would be appreciated, 2018 340i xdrive AT
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07-22-2021, 08:08 AM | #3 | |
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04-12-2022, 03:53 AM | #4 |
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Here are some tuning and coding stuff:
Coding Instrument cluster to remove the 263 Km/h Cap : Modified Sports Displays to read higher numbers :
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2018 340i 8AT RWD - M Sport - Catless MPPSK - Stock Turbo - Stock HPFP
-------- Tunes: Self Made Tunes - MHD ------ Fuel: 92RON/87OCT -------- Last edited by IMS-340C; 04-14-2022 at 08:45 AM.. |
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WrxToBeamerGuy498.00 |
04-12-2022, 03:58 AM | #5 |
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My latest Tune 87 octane + E10 tune:
https://datazap.me/u/ims/ims-e10-175...20&zoom=98-277 Dragy 100-200 - Negative Slope - 30 Km/h Head wind: v
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2018 340i 8AT RWD - M Sport - Catless MPPSK - Stock Turbo - Stock HPFP
-------- Tunes: Self Made Tunes - MHD ------ Fuel: 92RON/87OCT -------- Last edited by IMS-340C; 04-12-2022 at 12:52 PM.. |
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04-12-2022, 10:49 AM | #6 |
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Increased midrange boost and timing, starting to see some corrections.
That's it will not go any further. https://datazap.me/u/ims/ims-e10-175...39&zoom=40-214 Dragy 100-200 same conditions: v
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2018 340i 8AT RWD - M Sport - Catless MPPSK - Stock Turbo - Stock HPFP
-------- Tunes: Self Made Tunes - MHD ------ Fuel: 92RON/87OCT -------- Last edited by IMS-340C; 04-12-2022 at 01:30 PM.. |
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04-14-2022, 09:16 AM | #7 |
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I noticed lately there are questions and some confusion about Ethanol.
Here are some answers and information about Ethanol: - Ethanol is NOT ROCKET FUEL, it's an Alcohol which is actually less Flammable and has less Combustion energy than Gasoline. - Ethanol works as an Octane Booster which allows the use of more Boost/Timing which translate to more power. - Up to 10% Ethanol clears most Timing Corrections. - Up to 30% Ethanol allows the use of a higher Tune, example from Stage 1 91/95 up to Stage 2 95/102. - Gasoline Tunes can be used with Ethanol mixed Fuel but Ethanol Tunes can't be used with Ethanol free Fuel. - Ethanol is not needed if there are no Timing corrections and if there is a good Timing Advance of 14 degrees at 6500-6800 RPM. - The Stock HPFP maxes out at around 30-32% Ethanol when running high Boost because Ethanol has higher Density than Gasoline. - Gasoline mixed with Ethanol to reach XX octane produce less power than same XX octane Ethanol free Gasoline. - E85 is 85% Ethanol and 15% Gasoline.
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2018 340i 8AT RWD - M Sport - Catless MPPSK - Stock Turbo - Stock HPFP
-------- Tunes: Self Made Tunes - MHD ------ Fuel: 92RON/87OCT -------- Last edited by IMS-340C; 04-14-2022 at 01:05 PM.. |
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dinan5m34355.00 WrxToBeamerGuy498.00 |
04-14-2022, 09:56 AM | #8 | |
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Followed along every points made in last post except for following.
So, pump 93 octane mixed with Ethanol for ~E30 blend makes less power than same pump 93 octane without the mix? Quote:
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04-14-2022, 10:04 AM | #9 |
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No. Its about octane rating. By adding ethanol, you raise the effective octane rating. So lets say with an e30 mix (93/e85) your octane is around 100. If you ran an ethanol free 100 octane gasoline, you should be able to make the same, or more power. But since 100 octane gasoline isn't readily available, running an ethanol blend allows easier access to a higher octane fuel, allowing more timing and boost.
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Current: 2019 440i xDrive Gran Coupe - Alpine White, Coral Red Dakota Leather, 8AT, MSport, THP, BM3; 2015 X5 35i xDrive - Mineral White Metallic, Mocha Dakota Leather; Previous: 2015 Subaru WRX - World Rally Blue, Premium, FBO+Tune
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04-14-2022, 10:11 AM | #10 | |
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So, 100 octane/0% ethanol > 93/e30 mix (around 100 octane) > 93/e10 |
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04-14-2022, 10:12 AM | #11 |
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04-14-2022, 11:12 AM | #12 |
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100 octane 0% E > 100 octane reached using E mix.
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2018 340i 8AT RWD - M Sport - Catless MPPSK - Stock Turbo - Stock HPFP
-------- Tunes: Self Made Tunes - MHD ------ Fuel: 92RON/87OCT -------- |
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dinan5m34355.00 WrxToBeamerGuy498.00 |
04-15-2022, 02:56 PM | #13 | |
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It's much simple than this.
Both fuels same octane so timing will be the same. Ethanol is much slow burning than Gasoline so the fuel containing Ethanol will create lower combustion energy which will result in less power. Real world example Formula 1 engines this year lost 50 HP because they added 5% Ethanol. Hope it makes sense now. Quote:
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04-15-2022, 03:18 PM | #14 | |
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04-15-2022, 04:19 PM | #15 |
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Sorry to continue with Formula 1 they are capped by a specific fuel flow.
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2018 340i 8AT RWD - M Sport - Catless MPPSK - Stock Turbo - Stock HPFP
-------- Tunes: Self Made Tunes - MHD ------ Fuel: 92RON/87OCT -------- |
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04-15-2022, 04:43 PM | #16 | |
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Also I'm learning a lot from all of your comments so don't stop sharing your knowledge please |
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04-15-2022, 05:02 PM | #17 | |
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Yes you are right if they inject more fuel and boost more air they will recover the 50 HP but the rules say they can't use more fuel.
Are you following F1 ? there are 2 races in the U.S. this year Miami and Texas and next year Las Vegas will join. Quote:
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2018 340i 8AT RWD - M Sport - Catless MPPSK - Stock Turbo - Stock HPFP
-------- Tunes: Self Made Tunes - MHD ------ Fuel: 92RON/87OCT -------- |
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04-16-2022, 12:51 AM | #20 |
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Yes but that would be way too much Ethanol without a benefit.
Better try 95 oct tune with E20 mix and see the logs.
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2018 340i 8AT RWD - M Sport - Catless MPPSK - Stock Turbo - Stock HPFP
-------- Tunes: Self Made Tunes - MHD ------ Fuel: 92RON/87OCT -------- |
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dinan5m34355.00 |
04-16-2022, 03:44 AM | #21 | |
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But to burn more fuel you need more air.
The DME has a pre-determined AFR (Air Fuel Ratio) in a LOAD/RPM/AFR table. (See 1st post) It only adjusts the F part of AFR but not the A. This is a quick comparison I did between Gasoline only and Gasoline + 20% Ethanol: 100-200 MHD Stage 1 95 - Gasoline only: 9.3 seconds. 100-200 MHD Stage 1 95 - Gasoline + E20: 9.6 seconds. Quote:
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2018 340i 8AT RWD - M Sport - Catless MPPSK - Stock Turbo - Stock HPFP
-------- Tunes: Self Made Tunes - MHD ------ Fuel: 92RON/87OCT -------- |
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04-16-2022, 06:24 AM | #22 |
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I'm running the Stg 2+ 95 MHD tune with a shot of boostane, 93 octane and a gallon or two of ethanol. Results have been strong.
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