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BMW 3-Series (E90 E92) Forum
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1st COBB/JB N54 in 11s - goes to Canada ;) - 6MT too
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09-16-2011, 08:53 AM | #89 |
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we were at toronto motorsports park aka Cayuga.
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09-16-2011, 08:55 AM | #90 | |
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09-16-2011, 08:59 AM | #91 |
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I've been in the tuning game for a while under other platforms and cannot believe the guys here that actually think piggyback tunes are the way to go.
Honestly I didn't even know they still existed and were marketed but apparently most(and I use that word loosely) of the crowd here has no clue how tuning works, all they care about is dyno numbers. |
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09-16-2011, 09:16 AM | #92 | |
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Right now my 335 is stock as I refuse to "trick" tune it. I have thought about getting a COBB just to give it a little more kick, but to me thats the same as buying a mail order tune from an lsx tuner. More of a get you by until you can tune it yourself or get it tuned. I still will probably do it if I decide to keep the car. Cars usually don't last more than 2 years in my garage though, I get bored easily. I plan to run it again just for the fun of it in Nov at a local car sites track rental. Its ran a 13.55@105, 2.0 60' stock on run flats but the DA was over 2000ft. Hopefully I can get some -DA and a little hook off the line and run some low low 13's stock. |
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09-16-2011, 11:23 AM | #94 | |
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turning it off was done at my sole request to see how the car would behave with it off and if it would result in true misfires...on top of that, doing this is something that many other ppl do with other cars/platforms when strange issues such as this come up and they're not coil, plug, fuel, engine related but more along the lines of electrical noise or some sensor input that's crossing some threshold somewhere and causing the fuel to cut out...not sure how many of you actually took the time to read my misfire thread but if you have you'd notice that the "ACTUAL" issue that'd happen up top is that the DME would cut fuel to all cylinders...it was an engine wide fuel system shutdown...seeing that you can argue both ways, saying that a misfire happening will cause the DME to cut fuel to the cylinders but you could also say that something else caused the ECU to first cut fuel and then in that moment trigger/record the misfire code making it look misleading... really doesn't matter to me a whole hell of a lot at this point what the root cause is/was as long as the car's running like a champ...i choose to put it on the back burner, others choose to run nitrous on their car, others depend on meth to deliver the octane on high boost but choose to ignore the fact that they don't have a slightest idea on its distribution across all 6 cylinders, while others just crank boost up and don't give a shit about what their AFR looks like and knock the living lights out of their motor time and time again...there's always risk with anything being done, in this case there was no other option or thing to try...i was not going to open up the motor after seeing that turning off a diagnostic makes the issue go away completely and I've decided that when the time permits I'll come back to it and try to work on it with Cobb to see if we can track down what tables/logic in the ROM is responsible for causing that top end fuel cut which would end up in a misfire scenario...at least they have the means and the know how, given enough time, to look into the details of things like this right inside the ROM itself... in the end, a "true" misfire, if there really was one, would still manifest itself and its something you can definitely see and feel..if the misfire was indeed the root cause and it was so small that you can't even feel it or see the effects of it on the car than really what's there to be concerned about...not sure how many of you know but misfires happen on all cars all the time (i.e. remember that stumbling that happens every morning on cold start as the car is warming up, well) they only get recorded (code is triggered) after they occur within a certain timespan more than misfire detection thresholds are set for on the stock tune... the car is 100% smooth up top with it off and runs like a champ, all i care about Last edited by dzenno; 09-16-2011 at 11:29 AM.. |
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09-16-2011, 11:34 AM | #95 | |
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09-16-2011, 11:36 AM | #96 | |
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09-16-2011, 11:47 AM | #97 | |
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Serious question not meant to start anything, I really want to know.
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2jZ + RB26 + 4G63 + LS9 + N54 =
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09-16-2011, 11:56 AM | #98 | |
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09-16-2011, 11:57 AM | #99 |
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Thanks Jeff! I'd appreciate it!
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2jZ + RB26 + 4G63 + LS9 + N54 =
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09-16-2011, 11:58 AM | #100 | |
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On my car, and Clap has mentioned seeing this as well on his car, and everyone else is welcome to log their AFR and see as well, what I have already mentioned is part throttle/post shift air fuel targeting or as I like to call it the AFR roller coaster of DEATH lol... [FURTHER COMMENTS REMOVED FROM THIS THREAD/POST] will happily discuss in another thread.. |
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09-16-2011, 12:03 PM | #101 |
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Well done Dzenno. Some people don't understand that meth with the additional boost enabled is a huge factor. You having problems with the meth flow & boost and still managing 11s is well done.
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09-16-2011, 12:04 PM | #102 |
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I guess I should've just posted the slip and said, hey 11s on cobb's experimental tune on PUMP GAS...then it'd be like WTF! lol really, that's what it was...i think next time that's exactly what I'll do as given the timing this map runs I don't see any issues running it on pure pump 94 gas and no CM3-like nozzle flow that was flowing lol...maybe really i could've gone even faster if that little meth wasn't even spraying at all as AFR was already 11.5 with pump gas timing, in other words conservative and a half!
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09-16-2011, 12:42 PM | #103 | |
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09-16-2011, 12:44 PM | #104 |
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09-16-2011, 03:49 PM | #105 | |
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09-16-2011, 03:52 PM | #106 |
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09-16-2011, 03:56 PM | #108 | |
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Lol....dude you obviously went straight to the time and trap speed and MISSED everything in between.....sigh.
Dzenno is basically saying that he got the same time using a less aggressive setup, less developed tune, a worse '60 ft.....So just imagine the potentials if all of the above mentioned was better or more aggressive. Get the picture? Lol. Quote:
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09-16-2011, 03:58 PM | #109 |
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Yes nice to meet you as well. Bog pomogo.
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09-16-2011, 04:01 PM | #110 | ||
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