07-06-2021, 08:51 PM | #111 |
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BMW = Smarter then the average driver
The code will show anything out of normality that the car does. I use similar tech on our team race bikes. We data log EVERYTHING. If it overboosts its logged, higher rpm, logged, misfire or variance in preset target AFR's, logged. While you can uninstall the tuner JB4 or whatever it will still be in the cars ECU stored data logs. So unless your smart enough to crack the DME (been done apparently but in beta still) there will be zero way to over ride/write the logs. Tune it and enjoy it and when stuff breaks, upgrade it OR leave it the F alone OR sell it and buy a faster stock car..... Welcome to tinkering in 2021...
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07-09-2021, 11:25 PM | #112 |
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So for those who have been running JB4 for a few weeks now or months; what is your overall impression of the tune? Is the power bump fairly noticeable?
Is it like OEM? Any hiccups? I haven't ran JB4 since my 2011 335i.
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07-10-2021, 11:51 AM | #113 |
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Waiting for answers also. I just received my JB4 and its sitting in the box. I ordered it a while ago to make sure I had access to it should I decide to run it. Waiting for more tests from end users.
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07-11-2021, 09:57 AM | #114 |
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I recently returned my JB4. I decided against installing it as I prefer a DME tune rather than a piggyback. I will wait for the tuners as I know they are working on unlocking the ecu.
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07-11-2021, 03:12 PM | #115 |
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Most Likley going to do the same....
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07-12-2021, 01:42 PM | #116 | |
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So they are going to defend their position on piggybacks to the bitter end and not back down. While at the same time taking swings at flash tunes None of this is a problem at all but just figured I'd let you know you are not having a conversation with just another forum member, you are having a discussion with the manufacturer and/or their representative |
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07-12-2021, 01:57 PM | #117 | ||
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Quote:
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///M Last edited by Der_Wolf; 07-12-2021 at 02:23 PM.. |
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07-12-2021, 03:18 PM | #118 |
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Very interesting discussion on both sides. To a tuning dummy like me, it seems the PB tune is simply a voltage regulator that lies to the ECU saying, e.g., the X volts showing 24# of boost is really Y, showing 20# so add 4 more pounds of boost to get to X. The instant question, if I may go legalize, is what does the ECU store from this trickery? If it thinks only 24# was given, no harm/no foul. But, if it somehow shows 28#, warranty work would be justifiably denied. My question would be how would it show this? It it's tricked, it's tricked. There are 3 connections, and I don't know what the other two do or how they would be mapped by the ECU. Perhaps one of them would be the culprit.
"And no, a piggyback can not trick or block acceleration reading since ABS picks up that data directly from speed sensors in each wheel as well as uses GPS to eliminate false positives readings..." I don't buy this statement, however. So, you went 145. So what? It is not conclusive of anything except that you went 145 under conditions completely unknown to BMW. Moss Magnuson places a high burden of proof on the manufacturer. ABS readings would have no traction in an arbitration case except what is called obiter dicta in law. Interesting; but not specifically relevant. |
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07-12-2021, 04:04 PM | #119 |
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You can theoretically achieve hella more Gs on track or roads with camber and elevation changes so thats out. I think the trans stores data. I was also reading that the G80 calculates air flow off various parameters, which in theory may be a bit off if you are running outside factory specs. But my main concern would be the torque reading as a dead giveaway.
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07-18-2021, 12:10 AM | #123 |
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Thanks for sharing Glemm1970
From the looks of it, you have a competition? 6.6 100-200 is a monster! How is the drivability of the car? Does it run like stock?
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07-18-2021, 06:29 AM | #124 |
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07-18-2021, 12:56 PM | #127 |
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Nice!!
I see lots of potential with this platform!
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07-19-2021, 09:04 PM | #129 |
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chris3g How's the feedback on your 6MT so far?
I really keep flip flopping on ordering the JB4 or not...it's been in my cart for weeks now. I'm hoping that it would dial up even more drama in the car? It seems like the competition due to gearing and higher torque feels wholly different. How's your car been running? Did you solve the comfort v. sport plus boost levels?
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07-21-2021, 01:21 PM | #130 | |
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07-30-2021, 03:30 AM | #131 | |
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The absolute only way they can deem a possible tinkering in tuning is going to be with the torque load. And that's an entirely different beast and road that is hard to win if fought on their end. Cheers
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07-30-2021, 05:09 AM | #132 | |
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Now to address the first part of your post I thought these piggybacks were still data logged in the CPUs. You’re saying not with the JB4? How about Racechip? |
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