07-31-2016, 12:01 PM | #1 |
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So US is getting screwed on MPPK for 340i
Well still no news. I'm pretty much giving up hope. Highly irritated as I feel this car runs too lean to run a piggyback.
I hope flash tuning is the same as EWG n55's. We need something. |
07-31-2016, 07:42 PM | #2 |
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Yes the US is getting screwed!
But initial dyno reports of JB4 show a piggy back works well...
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08-01-2016, 01:42 AM | #3 |
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I wonder if the MPPK fits in carry on ?
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08-01-2016, 02:40 AM | #4 |
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Drive to Canada and get it done lol! It will probably take awhile but I think it will be released. It's everywhere but the US and I feel like US regulations might be holding it up. To me it seems like there are limited aftermarket options in general for the 340/B58 even though it's been out for over a year.
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08-01-2016, 08:24 PM | #5 |
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JB4 not working well for me real world. I'm seeing 14.2:1 AFR's under full boost and higher rpm. I'm also seeing 15.8:1 spikes regularly during spool. I'm not comfortable with it at this time. I messed with the settings some but it needs a O2 biaser like the N54.
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08-01-2016, 09:06 PM | #6 | |
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08-07-2016, 08:59 AM | #7 | |
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Clearly Terry wasn't happy either as he is using IAT biasing to lower timing. He can't do anything about AFR for now. But the spikes to almost 16:1 during spool bother me more and it's not on tip in either it's as the spool takes off, so several pounds of boost. If someone can explain to me how a motor all of sudden can run 11:1 compression, and almost stoichiometric AFR with 14+ pounds of boost on pump when that was impossible for any engine before including the DI N54. Not to mention the IAT temps on this motor tend to be higher on average then the N54. It makes no technical sense to me. When someone can tell me what's changed so dramatically to allow this I'll feel better. Because as far as I know no motor before has been able to withstand this. Basically my point is I think it's on the bleeding edge for pump gas stock adding 3-4 more psi with equal timing and same AFR has me worried. I'd like to see what the MPPK runs. Last edited by //M; 08-07-2016 at 09:10 AM.. |
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08-07-2016, 02:02 PM | #8 |
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The B58 has some unique tuning challenges including an IPW limiter built in to the DME logic. The AFR and tuning the JB4 runs is perfectly safe for the vehicle. As proven by several 1/2 mile events beating the crap out of it. It has lean spool mode down low along with multiple injections per stroke then AFR should be in the mid 13s at higher RPM. Which is the same as all of the F series N55s. On the F series N55s many are running 500whp+ with larger turbos on those air/fuel ratios for tens of thousands of miles with perfect looking plugs and no issues.
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08-07-2016, 08:25 PM | #9 | ||
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If you aren't comfortable with it after talking to him then it is definitely your choice to not run it.
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08-08-2016, 07:23 AM | #11 | |
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08-08-2016, 07:43 AM | #12 |
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I used ignition timing value to disable IAT comp. You move the value from 5 to 0 to disable.
I will send some logs to Terry. I'm seeing probably a half point leaner then what people are saying / dynographs show. |
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