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BMW 3-Series (E90 E92) Forum
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Mike/Terry, can you please join this discussion?
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02-21-2011, 12:09 PM | #199 | |
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no you wrong, the stock setup knocks a bit so knocking more at higher psi must be fine as well.
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02-21-2011, 12:10 PM | #200 | ||
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I have never made it personal against you, I never want to make any of this personal. INCLUDING each person's intelligence. You can not show me how much and or how hard it actually "knocks", you can show me that there is Frequency's that the OEM sensors senses and in turn lowers timing, but you can not show actual "knock" because the Timing is lowered before said knocking occurs. (Which is what it is suppose to do) |
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02-21-2011, 12:13 PM | #201 |
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For those that still dont understand this. It is not a matter of the knock sensor not dropping timing, its a matter of the car always trying to raise timing to the stock point (which is way to high for raised boost) and repeating the process over and over again.
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02-21-2011, 12:16 PM | #204 |
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Is that not the job of the knock sensor and one of the reason that it is built into the car?
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02-21-2011, 12:16 PM | #205 |
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It is possible BMW is retarding timing at the slightest knock and may not be very damaging... but why take the chance. Terry, or others don't have the detailed information on this... maybe BMW does, but the testing was at lower boost levels. they thought it was necessary to retard the overall timing map in the IS model... why, you ask... BECAUSE OF INCREASED BOOST.
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02-21-2011, 12:17 PM | #206 |
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02-21-2011, 12:17 PM | #207 |
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02-21-2011, 12:18 PM | #208 |
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But he says it is not needed and the timing drop out are fine, but yet the jb4 now lowers boost .25psi with each of these timing drop out. Which is pretty useless cause it if works as he says it works, it will lower boost to stock over time, make it sort of useless. The other jb4 pro version will have cps offseting, even though its not needed....
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02-21-2011, 12:20 PM | #209 | |
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02-21-2011, 12:22 PM | #210 |
been there... done that
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02-21-2011, 12:23 PM | #211 |
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I don't think he can with the current setup, if I am not mistaken. The jb4 just uses can data to react quicker but it still does not address timing which it relies on the stock system to prevent knock. Essentially jb camp says since the stock ecu "knocks or reacts to knock" and does a great job @ stock levels that you are perfectly safe using this system @ raised levels. They claim these pre-knock events are not harmful to the car at all and that it's no big deal. EVERYONE ELSE SAYS B.S., these events are dangerous and their cumulative effects are detrimental to our engines. I agree with everyone else.
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02-21-2011, 12:24 PM | #212 |
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He can't. His simple board doesn't have the necessary components/design/processor.
But here is the back story. You can do a search and see for yourselves: Upon the release of the jb3 a couple years back, he repeatedly claimed that it did indeed have such a timing control feature. Only to be proven untrue, months later, by an in-depth board analysis and oscilloscope testing done by scalbert (a user on this forum). Caught in a monumental lie, Terry/Mike claimed that they eliminated the feature in the last minute before release and forget to update their marketing material or tell any of their customers or dealers. Terry/Mike claimed that they found a "better, secret" way to control timing. And that turned out to be... wait for it.... not doing a damn thing. Many of us assumed this would be the end of the JB tune and BMS. But it turned out that it's easier to target noobs who aren't privy to this information or knowledgeable on the subject of tuning than it is to admit wrongdoing and go back to the drawing board. This is one of the many reasons that Mike/Terry has absolutely no credibility with many older members on this forum. Forum searches are useful. It will show why many of us aren't tolerant of misinformation presented by certain parties who have a long illustrious history of presenting such misinformation. |
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02-21-2011, 12:28 PM | #213 | |
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And this has what to do with timing or using the OEM knock sensor that BMS currently uses? Im sorry, but as a professional in my own business, you should have respect for competitors, even if you feel they have done and or are doing wrong. Two wrongs don't make a right Shiv. |
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02-21-2011, 12:30 PM | #214 | |
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02-21-2011, 12:30 PM | #215 | |
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thats pretty well spot on chap
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02-21-2011, 12:30 PM | #216 | |
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Cobb, BMS, and I'd venture to guess BMW would say thats not knock in the traditional sense.
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02-21-2011, 12:32 PM | #217 | |
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assuming your meth is integrated properly and never ever fails. I personally don't like the idea of a supplemental system that requires another high pressure pump being relied upon to keep your engine healthy.
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02-21-2011, 12:33 PM | #218 | |
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02-21-2011, 12:33 PM | #219 | |
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02-21-2011, 12:33 PM | #220 | ||
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