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Originally Posted by 2msport
Question. Will there be an updated firmware release for JB stage 1? Map 1 on the JB4 is supposed to be the same as JB stage 1 correct?
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Hey man, there seems to be a new stage 1 that he is sending out with new firmware so I'm assuming yes.
As to the similarities, with the current public firmware JB4 Map 1 is basically almost exactly the same as the Stage 1. However, the new Jb4 firmware that he is having a couple of us testing is completely different then the old map 1 and the stage 1. It's an "additive" map in that it doesn't target absolute boost values but instead works off the underlying factory boost to improve drivability and give you more power of the conditions are right. Basically the new firmware makes the car respond as if it's completely stock just came tuned at a higher boost throughout the range, while the old firmware always shot for a specific boost level giving you that jerkiness feeling that doesn't really feel natural.
It's better explained when you compare the logs of the old firmware and the new firmware and can see what the Jb4 is attempting to target and the actual values...
This allows one on an EWG car hit about 22.4 PSI with no supporting mods and still be SAFE because you are hitting it in the rev range where it's ok. Where as before you if you hit that PSI at the wrong spot on the rev range (because it's was always targeting a high PSI) you could potentially blow something.
Overall it has better control over boost and ends with a phenomenally driving car
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Wife's Car: 2020 X4M Competition, Alpine White on Black Alcantara and Biege
Current Car: 2018 F80 M3CS, SMB, DCT, ZEC, MPE
Recently Departed: 2020 F87 M2C, LBB, ZEC, 6MT (Euro Delivery Aug. 29, 2019, totaled by an idiot in a Camry who then ran from the scene)
Wife's Prior Car: 2018 F80 M3, Yas Marina Blue, DCT, Black 19s, Carbon Structure Anthracite Cloth/Leather Combination, Driving Assistance Package (Euro Delivery Oct. 9, 2017)