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Tuner Says jb3/4 is horrid?!?!
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06-07-2012, 02:42 PM | #45 |
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Okay, I dont know what the subbie tuner is talking about, but i think he just wants to tune ur BMW and make some cash. I 100% agree that piggyback tuner is not the best tuner but it works great while your trying to get everything dialed in. I take my time with my cars and build them up slowly getting what is best for the car. So I wont be ready for a tuner to start dialing in my car until it is almost done, needless to say it will never actually be done, and if it is its time for a new one. But while you are gathering all of your mods and butting the beast together I recomend the JB4 tune, because it is a night and day difference. It performs amazingly for what it is, a piggy back. But I agree with the subbie tuner, its not a professional tune done by a person that tunes cars all day everyday.
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06-07-2012, 02:51 PM | #46 |
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FWIW, piggybacks are the king of boost control over flash. However when it comes to real timing adjustments and real fuel control, VANOs tuning, etc, flash can't be beat. With that said the BMW PID logic is a nightmare heh. In a perfect world I would only use a piggyback for boost control and doohickey gauges/meth safety and a flash for everything else.
The JB4 G5 leaves me satisfied though. And this comes from someone who's tried them all.
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06-07-2012, 03:06 PM | #47 | |
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We are talking about the BMW platform, right? The ECU adapts, it works very well and the tuner (BMS) has taken this into account. Not sure how it's relevant to the BMW and why they are being trashed because they used a more efficient approach to tuning. They worked with the platform they were given. I haven't heard any nightmares about their approach, their prices are lower and their numbers are consistently higher than the other tuners. Not sure at this point what the advantage is to buying any other system if your car is lightly modded.
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06-07-2012, 03:08 PM | #48 | |
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06-07-2012, 03:11 PM | #49 |
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Itsmeek or Mike@n54tuning: Please explain how you believe the dme to "adapt" to knock.
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06-07-2012, 03:11 PM | #50 |
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It "adjusts" (for lack of a better/more technical term) to the conditions (based on knock). I agree on the consistency, but again- you are paying $500ish vs $1600ish or $2kish for something that really isn't that different. How many of us go to a track anyway? If I go, it's not for 1/4 miles.
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06-07-2012, 03:12 PM | #51 | |
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im from the audi world, so yes, there are people who would rather be faster than consistent.
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06-07-2012, 03:13 PM | #52 |
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Its def a lot more fun to be fast, inconsistent & break shit occassionally.... Not like it's expensive to fix a BMW
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06-07-2012, 03:15 PM | #53 | |
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Specifically in regards to following: -Adapting being the ideal method of tuning? -Consistently higher numbers? I think there seems to be some confusion on how "adaption" really works and what is going on in the background. You do realize the stock DME will detect knock, then reduce ignition 3 degrees, if no knock occurs it will be steadily increasing ignition until it knocks again, to reduce 3 degrees. Not sure how that is consistent.... Exactly. |
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06-07-2012, 03:18 PM | #54 |
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I don't know why you're inciting a war when the JB4 offers CPS. This is all a moot point now.
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06-07-2012, 03:21 PM | #56 | |
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06-07-2012, 03:25 PM | #57 | |
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CPS comes into play on pump gas for sure re: consistency.
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06-07-2012, 03:26 PM | #58 | |
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Also, I've witness first hand the effects of the original CPS box. As have others on this forum. I hope BMS has brushed up on their engine tuning theory since then. |
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06-07-2012, 03:33 PM | #59 | |
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It is always safe to add ignition so as long as your not on the verge of knock and or making more power. Adding ignition blindly is a different subject of course. |
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06-07-2012, 03:36 PM | #60 |
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I believe having ignition control in both directions (advance and retard) to be desirable. As would any other tune with more than a topical understaning of engine tuning theory. I believe our results speak for themselves with regards to engine failure. I think itsmeek should investigate engine failure history before making some of the conclusions he made. While development does usually involve stumbles along the way, one should hopefully learn from mistakes instead of trying again and again at the end users behalf.
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06-07-2012, 03:36 PM | #61 | |
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When you reduce timing and not ride the knock sensor, you lose power but gain consistency. Proactive versus reactive. We all get that. So can you kindly explain what you experienced first hand with BMS CPS implementation? Works great for me with RBs.
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06-07-2012, 03:40 PM | #62 | |
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Not for nothing, all this CPS offset or advance is nonsense if the car flatlines on its face after a shift.... Can't beat ignition safer than -1.88 degrees post shift.
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06-07-2012, 03:41 PM | #64 |
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I love how shiv touts how his piggyback is so much better than the jb4 yet not a week goes by it seems without someone posting a proceed log asking how there car is running while there fuel trims are maxed out, running 17lbs of boost, with an afr of 16-17:1. But hey, it has superior ignition control, so its the better toon.
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06-07-2012, 03:43 PM | #65 | |
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06-07-2012, 03:44 PM | #66 |
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So hard to have a factual conversation on this platform without people just coming in to piss on the fire.... Cmon guys. It's like nobody wants to learn or listen. Let's just keep bickering or stick to facts. Lets not assume. Let's not suggest. Let's not poke fun.
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