07-14-2021, 02:01 PM | #89 | |
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07-14-2021, 03:13 PM | #90 | |
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AnotherG20 on youtube is nearly in the 10s with a RWD stock turbo car also: |
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07-14-2021, 06:22 PM | #91 |
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Guys kind of off-topic not actually uploading any JB4 times.
But I got my car like an year ago and it still has like 1 year and 8 months of full warranty. So I talked to my bmw dealership where the guy is really a cool guy and I asked him would I have any warranty problems if I go for JB4. He said something about newest bmw's like MY2020+ are sending all kind of data OTA and it will "probably" mark my car as tuned and thus will void my warranty if anything happens to my engine or gearbox. Does someone of you ever had experience with having an engine issue and jb4 installed? Is this just a bmw trying to scares me off? Or it is a real thing... I really want to tune my car I just feel it a little bit weak after 70 mph, my last ride was a V8 supercharged car with 500 hp and 800 nM. |
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07-14-2021, 09:24 PM | #92 |
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There's a thread by mission performance that explains how they can tell if you have a jb4 or another piggyback tune, dunno about OTA tho, guess it's possible tho. Even if it can't flag you remotely, if you have to go in for Warranty work, apparently they can now tell if your car has been performing outside of the stock levels once it's connected to their system.
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07-15-2021, 10:46 AM | #93 |
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It won't leave a trace on the dme, but if they dig hard enough they can still tell you've done something tho. My understanding, was that any major warranty claims will have a bmw rep come out and investigate, in which case any relationship you have with the dealer wouldn't help.
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07-15-2021, 11:05 AM | #94 |
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TLDR: Flash tunes are detected proactively, piggybacks are detected retroactively - end result is the same.
Piggybacks are 100% detectable after removal - over the last several years the argument to the contrary has been put to rest. I would be highly suspect of anyone that says anything otherwise Now your dealer won't know the brand or the color of the box but the trace evidence left behind after removal can and will be found out if BMW wants to dig. Do piggybacks get flagged up front like flash tunes? No they don't but it doesn't matter...flagging just says proactively that the engine output has been manipulated in some way and DOES NOT void your warranty. Piggybacks on the other had get found out retroactively but the end result is the same. The flagging thing is a non-issue. That said this is no reason not to go with a piggyback - but someone should not go with a piggyback (any piggyback) based on the fact that they think they are safe from detection. The "non detectable after removal" was a valid selling point years ago but is not applicable today Last edited by chenry; 07-15-2021 at 12:24 PM.. |
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07-15-2021, 12:04 PM | #96 | |
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As life long resident of California- ouch 50 years now - cant wait to move - but Ill keep a house here Yes we have some new stuff bouncing around as usual regarding tuned cars and smog - but no one is going to be exempt from that even companies that have current CARB (California air resources board) acceptance/exception will be out of luck. What the legislature is trying to push through is any manipulation of a cars computer will be a problem. Of course the work around, if you are so inclined, is to flash back to stock or pull your piggyback Last edited by chenry; 07-15-2021 at 12:14 PM.. |
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07-15-2021, 12:21 PM | #97 |
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As long as u don't have a downpipe that throws a cel of have something like an upgraded hpfp that requires a tune to run.
Can u drive a car there that's been modified as long as it's not registered in California? |
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07-15-2021, 05:14 PM | #98 | |
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So I guess there is no way to do a engine power tune without void the warranty :/. That makes me kind of sad... |
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07-15-2021, 06:34 PM | #99 | ||
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Drives: 2020 BMW M340i xdrive
Join Date: Oct 2020
Location: Saskatchewan CANADA
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07-15-2021, 07:47 PM | #100 |
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I was wondering the same thing, someone told me civics have a short period before it's overwritten. But I was wondering if the car would save and flag certain information, or even if it didn't, my concern is that if something goes wrong with the engine, I wouldn't be able to drive the car long enough to over write that period of time.
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07-15-2021, 10:35 PM | #101 | |
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I would have no concern running a stage 1 or 2 flash from one of the majors or a piggyback on this engine - the B58 has been around for almost 5 years now and there is zero history of failure due to well designed flashes or piggybacks. Just my 2-cents, hope it helps Last edited by chenry; 07-15-2021 at 11:02 PM.. Reason: added dancing BMW guy |
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07-16-2021, 11:31 AM | #102 | ||
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07-17-2021, 11:52 AM | #103 | |
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Not saying don't tune it, but do some research and obviously don't base your decision solely off what ppl on a forum tell u. Sorry, don't mean to be a downer or dispute anyone else's view on things. |
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07-17-2021, 11:55 AM | #104 | |
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07-18-2021, 01:01 PM | #105 |
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Slight favorable slope but lost traction off line due to wet and sandy roads from rain today as you can see by the drop in g forces at the launch. Still have yet to find a good spot. Might go down to New England Dragway and see what I can do on a prepped surface and get full 1/4 mile runs in. EDIT: did another 0-60, still not ideal road conditions and a passenger so subtract a tenth or so for the passenger. xdrive JB4 Map 3 CTS Turbo catted downpipe MPE on the all season run flats Last edited by evan103207; 07-18-2021 at 07:21 PM.. Reason: another run |
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07-19-2021, 11:16 AM | #106 |
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Xdrive JB4 questions
Hi everybody, new 340i xdrive owner here. Looking at the JB4 tuner and have a few questions if anybody wants to chime in and help me out. Ive been searching but am pretty confused
drag runs First off, i have been using a draggy at Orlando speed world drag strip and my 1/4 miles time match up well with the track times. my best 1/4 mile is 12.466s at 109.4 mpg 0-60 was 4.22s. How are people getting under 4s 0-60 on a stock car? (i understand draggy includes rollout for 1/4 mile but not 0-60). Is my xdrive detuned because of the all seasons? (i know top speed is reduced to 130) Second question: is the JB4 setup to take advantage of the extra traction of the xdrive? i'm currently feeling like i made a mistake with the xdrive, its no quicker than the supra ive tested or apparently other rwd m340s. 3rd question: shouldn't i be able to launch an AWD car above 2500 rpms? i miss the tunable launch rpms of the m3 i tested. Does JB4 increase the launch rpm? |
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07-19-2021, 12:04 PM | #107 | |
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07-19-2021, 12:19 PM | #109 |
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07-19-2021, 12:26 PM | #110 |
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First pass in the video was launch control, next two were brake boosting. I have found with the draggy that building up the boost for several seconds actually results in a slower 0-60. My best 0-60s have been traction control off brake boost for 1-2 seconds. Manually shifting hasn't seemed to help much, maybe I'm doing it wrong lol
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