04-15-2013, 12:38 AM | #353 | |
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4.71 1st 2.34 2nd 1.52 3rd 1.14 4th 0.87 5th 0.69 6th. In addition, take a look at this chart and info: ZF 6HP It appears the ZF 6HP should be more like 1------2----3---4---5---6. The only reason an uneducated person like myself would come up with for it appearing like the biggest gap between gears is 2->3 would be some sort of ecu trait which wouldn't make sense to me. For the ZF 8HP I had to break it into two graphs as the online tool I found is limited to 6 gears: ZF 8HP 1-6 ZF 8HP 3-8 It's interesting to see the 8HP runs 65mph at about 1700rpm and the 6HP runs 65mph at 2100rpm. The 8HP gear ratios above 4th seem spaced oddly and must be based on probability for driving at various highway or street speeds to optimize mpg? |
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04-15-2013, 09:24 AM | #354 | |
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Thanks again.....you have me sold! |
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04-15-2013, 11:44 AM | #355 | |
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Anyhow, see this plot of the ratios: The biggest discrepancy between the smoothed spline curve and the actual points is between the 2nd and 3rd gear, which I think leads to the feeling that there's a missing gear. It's how they're spaced, with the emphasis on the high gears. Which certainly makes sense for fuel economy, but a shift (no pun intended) towards closer spacing for the low gears might have chopped off a little on the 0-60 end, and made for a more spirited drive. But then again, I'm no expert either. |
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04-15-2013, 09:59 PM | #356 | |
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04-15-2013, 11:14 PM | #357 | |
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But getting a small kick in the back, or two, or hearing a little extra growl isn't all bad. It may not be the most efficient way to get to speed, but it feels good I also notice that if the ratios of 3rd and 6th on the ZF8 had been just a TINY bit higher, the progression would have been pretty much all smooth. Last edited by Grovsnus; 04-15-2013 at 11:48 PM.. |
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04-16-2013, 06:55 AM | #358 |
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As technology advances there will be things about the automobile that will be missed, like the exhaust note of a N/A large block V8 or the jerk of maybe not so perfect a xmission / shift
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04-16-2013, 12:51 PM | #359 |
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04-17-2013, 06:36 AM | #360 |
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04-17-2013, 12:26 PM | #361 |
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I just visited burgertuning.com to check out the JB4 info. For just over $500, is there any reason NOT to do this? and what is/does the USB cable comb do? I also noticed they only list potential HP increases and not TQ increases for just the tune? Sorry if I missed it in this thread, but did anyone do a dyno with the jb4 on a 35i yet to see what the differences are at the wheels? Do you think/know that it will be more than the $2,000 Dinan tune?
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04-17-2013, 02:54 PM | #362 |
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04-17-2013, 08:14 PM | #363 |
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So take the 15 mins and return to stock for your warrantee or service needs. Easy
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04-17-2013, 08:19 PM | #364 |
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04-17-2013, 08:42 PM | #365 | |
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You can delete the codes through the JB4 itself or a on OBD-II hookup, but you have to know what the codes are, and which ones NOT to delete. For the X1 the full code set has, to my knowledge, not been documented in public yet. |
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04-18-2013, 12:02 AM | #366 | |
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You don't pick and choose which codes to delete, you just press clear codes. This clears even shadow codes. I can confirm this with 100% certainty. Also, the complete N55 code list is well documented in public and I can confirm they match with the N55 in the X1. All bets are off for the N20. |
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04-18-2013, 04:22 AM | #367 | ||
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/facepalm What r u even doing in this thread if you've got issues w/ modding? My SA for one knows full well I run a BMS Stage 1, and isn't the least concerned. In fact, he suggested I return to stock when doing updates to avoid any issues to my ECU, just in case. Take your self-righteous drivel elsewhere. |
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04-18-2013, 06:58 AM | #368 | |
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I think it's great to mod cars. I do not think it's great to then expect BMW and the dealer to support the modded car when their warranty and service terms state that they don't. Anyhow, someone asked what possible downsides there could be to adding a BurgerTuning kit and I answered. Again, please stop posting personal attacks on public replies. If you (as seems obvious) have an issue with me, take it private - don't let your personal dislike for me get into the posts again. Please, just leave my posts alone, and I'll do the same to yours. Last edited by Grovsnus; 04-18-2013 at 07:02 AM.. Reason: quote formatting |
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04-18-2013, 07:16 AM | #369 | |
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And do you really want to clear all codes, including the ones that are problems? "Miss Mechanic, I have this problem that comes and goes with [...], can you take a look at it?" "Sure - let me check... No, everything looks good from here." I prefer being honest about it. If I tune, I'll pay for my own services, and won't try to use the warranty on anything that might be affected by the tune. I don't like the idea of other BMW buyers subsidizing problems I caused due to tuning. |
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04-18-2013, 07:37 AM | #370 | ||
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04-18-2013, 11:15 AM | #371 | ||
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To summarize as answer to the question that was asked: Potential downsides to installing the BurgerTuning JB4 kit include: - You may lose warranty / free service. This depends on your dealer and/or whether you are willing to hide your tuning. - Before service, you should remove the tuning kit. This isn't just for hiding that you've been using one, but because the mechanic is unlikely to know what effect the tuning kit has on the OBD-2 output. - For the same reason, and/or to hide your tuning, you might want to clear the codes that might have been thrown before taking it in. - If you clear all codes through the JB4, you also clear those not related to the tuning. If you want the service rep to take a look at them, you need to be able to reproduce the codes. Looks correct? |
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04-18-2013, 11:18 AM | #372 | ||
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04-18-2013, 01:41 PM | #373 |
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Ok, thank you, that's makes a lot of sense. I have 93 available here on Long Island NY....
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04-18-2013, 04:47 PM | #374 |
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Also one note in the discussion with paradoxical3. I believe it is only the JB4 that has any code clearing capability. Someone using a Stage 1 (non JB4) would not be able to clear any codes without additional hardware/equipment. Would this be a correct statement ?
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