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08-21-2011, 08:03 AM | #23 | |
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"Cobb specifically said that running 2.03 or earlier maps on 3.0 beta firmware will produced undesired effecs." |
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09-16-2011, 01:24 AM | #24 |
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I just switched from the JB4 to the Cobb yesterday, the JB4 worked great for me for a couple months then all sudden top end power just up and dissapeared with no apparent problems, after the last 3 weeks of diagnosing I finally decided I'd just order the Accessport and see if it helped.
Well car runs beautifully with the Cobb map, very very smooth power delivery, torque feels better than it ever did, top end has returned with a vengeance. Really I couldn't be happier with the tune, I did some logs and everything looks great, no timing is being pulled, boost control is smooth, everything just looks great and I won't be going back to a piggyback.
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08' 135i MT || Cobb Stage 1 'Aggressive' 4.01 Map | BMS DCI | Berk Mid Pipes | Maddad Eurosport Axleback | E93 FSB | M-Sport Black on Black | CDV Delete ||
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09-16-2011, 07:27 AM | #25 |
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I made the transition from JB4 to Cobb and I don’t regret it... Yes maybe JB4 has a little more hp, but to tell you the truth I can't notice the different. However it is much smoother than the JB4, and also having the convenience of installing and uninstalling in less than 20 min is a no brainer!!
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Cobb AP stage 2+,MS DP's, Maddad Whisper, AA FMIC, BMS DCI, M3 Front Sway Bar, CF Spoiler, CF Diffuser,iCarbon Front Lip,Tints, Lux H8 V3, Black Kidney Grill, Alufelgen SF-71 19"
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09-16-2011, 10:38 AM | #26 | |
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I am kind of tired of people trying to compare Stage 2 JB4 to Stage 1 Cobb... like that youtube video that was posted. If you are going make a valid comparision, wait till Cobb Stage 2 is released and do an apples to apples comparison. Honestly, I contemplated moving to JB4 until one, I saw the initial numbers for the stage 2 beta last week and two, the 3.01 maps that were released. I will not make a solid decision until I get stage 2 installed on the car. Both setups have their strengths and weaknesses, but to says one is "faster" than the other, to me, is just an incorrect statement. |
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09-16-2011, 10:43 AM | #27 |
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I'm personally not concerned with one making 5-15 more hp. Whatever tune runs my motor in manner in which is makes good power and is happy (meaning no knock) is what prefer. For my car the JB4 just wasn't a great solution, lots of timing correction whether it was 95F out or 70. My logs with the Cobb are spot on with what you'd want to see.
I think if your OK with the fact that a FMIC upgrade will greatly improve the functionality of a solution that targets load the Cobb is a fantastic option.
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08' 135i MT || Cobb Stage 1 'Aggressive' 4.01 Map | BMS DCI | Berk Mid Pipes | Maddad Eurosport Axleback | E93 FSB | M-Sport Black on Black | CDV Delete ||
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01-20-2013, 04:54 PM | #28 |
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I don't know if I should go COBB
I am running the newest JB4 Stage 3 with
The G5 box. I have owned several turbocharged cars, this is my 2nd German turbocharged car, out of 5. But carrying on has anyone taken a closer look on what dyno meter that the cars have been strapped on, JB4 was on a dynojet and Cobb was on a Mustang load bearing dyno. This saying looks like the COBB makes more power regardless of it spiking at a higher boost pressure. Yes I agree that currently the JB4 makes or seems to make power with less boost, which is / has less tensile load to the engine. A/F and Timing and Vanos plays a important roll which I believe the Cobb does, and the JB4 relies on the factory MAP. I myself is on the fence on purchasing a AP. The features of JB4 has a lot of features That Cobb doesn't, but bottom line is what makes more Power stage per stage? Not really a fan excessive boost taper, I don't know if you can Tweak the COBB or run an independent MBC like a Hallman Pro RX to hold boost like 13 or 15 psi until redline. I have asked BMS question and Terry replies very quickly. I just feel like running both. but the MAP 5 is kinda weird. Boost fluctuates and not consistent. |
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01-20-2013, 05:39 PM | #29 |
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I have both Jb4 and Cobb, I can say I was less worried installing the Jb4 than I was with flashing the Cobb file. I was locked inside my car, unable to open the door for about 30mins as the Cobb AP backed up my ecu and flashed the new file. I was so worried about moving the damn Cobb AP that if it disconnected or something I could brick my ECU.
anyhow, if you want power get JB4, if your a brand whore get cobb. |
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01-20-2013, 05:48 PM | #30 | |
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01-20-2013, 05:52 PM | #31 | |
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Not saying it hasn't happened, but I haven't heard of a single car getting bricked while installing Cobb - the fact that you were so terrified about it is irrelevant. The fact that Terry now sells the Cobb unit and has a cobb map to support the jb4 speaks volumes. |
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01-21-2013, 11:23 AM | #32 | |
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01-24-2013, 07:07 PM | #33 |
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Is it pointless to get either JB4 or COBB without upgrading if im still running stock runflats?
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01-24-2013, 07:51 PM | #34 | |
Just one more taste...
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My Build Thread: Jet Black 6MT 128i with MSport
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01-24-2013, 07:59 PM | #35 |
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I agree, you may have limited traction in first and second gear but once your car is rolling it will pull much harder, plus it's just fun trying to controll the beast.
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01-24-2013, 09:37 PM | #36 | |
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You make the flash process sound like some kind of gulag. That's just silly. Changing maps with AP's has always been a breeze.
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01-30-2013, 03:06 PM | #37 | |
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The fact is that Burger is making good use of the accessport to gain access to the DME. He is smart enough to understand how to maximize the benefits of both the flash and piggyback. Burger is using their own custom map and not one from Cobb Basically the flash controls timing and fuel JB4 controls boost, CAN, meth, and safety features. I have had very good luck with this stacked setup so far! But back to the original question of switching. I would look at stacking the tune vs leaving one for the other. |
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01-30-2013, 08:56 PM | #38 |
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Not really misleading. My response was to someone saying if you want power go jb4, if you are brand whore go cobb.
The fact is, in big horsepower setups, Terry is now using his cobb map to deal with fueling issues (among other things) that cannot be addressed with the jb4 alone. So saying to go jb4 (and, by extension, not cobb) if you want power is silly at best. I can see where stacking has its appeal, especially if using meth. And there is the isolated boost control - but, to be honest, I am not sure what that means or what it buys you in real world performance. Personally, I am thinking of ditching my jb4 for a cobb unit. Keep it simple. Let the flash do everything. If I want meth, get a dedicated meth controller and be done with it. |
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01-30-2013, 09:14 PM | #39 |
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All this thread really proves is that there are fanboys of everything.
I like Terry and BMS because he has been working on our N54 engines since they came out. Cobb however, is bigger and has lots of experience working on other cars. They definitely know what they are doing. They BOTH know what they're doing. JB4 can do more with meth and other features, and Cobb can do more with fueling (should be noted that both are pretty limited because our fuel pumps themselves can only pump so much, regardless of programming, and that's the biggest problem with upgraded turbo setups it seems). There are advantages and limitations of each, and it's stupid to argue over what's "better". I really don't find the install of the JB4 annoying enough to justify the higher cost of the Cobb AP. That's my personal opinion, and that's what it is... an opinion. Also, as mentioned, I appreciate Terry as an enthusiast where I see Cobb more of as a big company that is trying to branch out and tap every market it can, while BMS sticks with BMW and just barely started tuning some Mercedes engines very recently. Again, that's just my perception/opinion. I could be wrong, and what I perceive could matter very little to others. I would personally get a Procede over either, but I already paid for a JB4 and it's plenty fast for me, especially with meth. You are entitled to your own opinions. Stuff like this is what idiots on ricer forums fight over. I'd hope if you can afford this car, you'd be intelligent enough to realize that not everything is black and white.
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01-30-2013, 09:41 PM | #40 |
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^ agreed. For me it is not even about the ease of install on one vs. the other. I just like the idea of a flash tune vs. intercepting and altering signals from the dme.
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01-30-2013, 10:32 PM | #41 | |
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01-31-2013, 08:22 AM | #42 |
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01-31-2013, 12:27 PM | #43 | |
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It is pretty much a fact that my car got faster after switching. Here is the proof: JB4 on map 7, fmic, dps on stock runflats Cobb OTS E30 map, fmic, dps on stock runflats Keep in mind I have gone faster than that Cobb time, but I wanted to show the closest 60fts to each other. It is pretty evident that I was making more power with Cobb due to the trap speed differences in the 1/8th and the 1/4 speeds. All of this is done WITHOUT METH. Thanks for playing. |
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01-31-2013, 02:54 PM | #44 | |
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God knows what fuel you ran on map7. And with jb4 some people like to play with settings which end up fudging things up. Or you could be the very few that have issues with jb4 and didnt make proper power. Comparing slips vs comparing dyno runs.... slips will have more variation compared to dyno runs. And as I said jb4 makes more power up top compared to cobb ots. |
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