05-25-2018, 04:50 PM | #1 |
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Stage 2 tune with stock cat harmful?
Anyone here has a stage 2 tune with stock cat? Is it harmful?
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2k15 335i Msport xdrive 6spd
Wagner Comp2 FMIC,FTP CP,stock exhaust. Fabspeed Sport catted DP, KW V2 coil overs,FBO BM3 Stg 2 |
05-26-2018, 09:02 AM | #6 |
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Ok kool,I personally don’t care for the burbles like most so I will perhaps have AA tune the burbles out. I heard that the stock cat gets very very hot under the hood so this was also a concern.
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2k15 335i Msport xdrive 6spd
Wagner Comp2 FMIC,FTP CP,stock exhaust. Fabspeed Sport catted DP, KW V2 coil overs,FBO BM3 Stg 2 Last edited by ceedawg; 05-29-2018 at 08:55 PM.. |
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05-26-2018, 09:49 AM | #7 |
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Without a downpipe that’s stage 1. You guys realize the calibration actually changes because the flow of the engine changes right? It’s not like some magical slider that tuners do in order to add more power. There’s actually boost control models and when you don’t have the correct hardware you’re opening yourself up experience lots of problems. Run the right tune for your hardware, and if you want to be loud while decelerating you’re gonna need a downpipe so you don’t burn down your car.
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05-26-2018, 10:37 AM | #8 | |
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There appears to be a few guys still using stage 2 tunes with cats still on. No one seems to have reported any failures as yet. Again I understand what you are saying.
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05-27-2018, 10:52 AM | #10 | |
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05-29-2018, 06:26 PM | #11 | |
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no. Have you even looked at the actual tables of a M2 ROM ver?
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05-29-2018, 06:34 PM | #12 |
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05-29-2018, 09:44 PM | #13 | |
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But to answer your question I haven't even began looking through the FR to compare to the implementation that VAG does on MEx17 ECU's, trying to resist port flashing until my bflash arrives so I can make a boot backup first. |
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05-29-2018, 11:12 PM | #14 | |
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It's going to be hard fetched finding a FR for the MEVD172 period that is production. What's the point of making a boot backup on your DME? BMW knows. You can easily flash the BTLD, and Program / calibration data to factory spec via ESYS anyways. Obviously you won't be able to revert EEPROM data... and from what I'm aware of, most tools out there like KESS/KTAG aren't able to R/W EEPROM anyways.
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05-30-2018, 11:11 AM | #15 | |
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Back up is not for warranty, it's that I will want to implement map flashing into my own tool, I also don't have the BMW plugins for CMD or KESS, only have a custom standalone port unlock tool and flasher. Also want to have as many flashes as possible before I have to do a restore. And BSL reads and writes E2P no problem with these. |
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05-30-2018, 02:56 PM | #16 | |
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I'm sure you will be able to work out the differences once you have an A2L or XDF in front of you.
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05-30-2018, 03:19 PM | #17 |
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Thanks for this!
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02-14-2019, 11:28 PM | #18 |
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N54 here but sounds like similar situation. I spoke with MHD and they said running stage 2 with stock cats is okay if you don’t drive it too hard. Sounds iffy to me but sounds fine for driving around town
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