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      05-16-2012, 10:45 AM   #1299
Gdubz
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Originally Posted by f1rst 1 View Post
nice...any other updates after a few days?
When I first got the car back, was still in Stage1 Aggressive. First thing I did was go top off my tank and switch maps to Stage2 Aggressive (just had catless downpipes installed). I gotta say that the car breathes a lot better, but I honestly feel like I've lost a bit of power down low. Maybe I'm just imagining it?

Either way...after new plugs, swapped coil pack positions, added catless downpipes, and switched maps from Stg1 Aggressive to Stg2 Aggressive, I'm no longer misfiring. The car feels good, just not quite as quick on the throttle as it did with Stg1 Aggressive.
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      05-16-2012, 10:58 AM   #1300
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Quote:
Originally Posted by Gdubz View Post
When I first got the car back, was still in Stage1 Aggressive. First thing I did was go top off my tank and switch maps to Stage2 Aggressive (just had catless downpipes installed). I gotta say that the car breathes a lot better, but I honestly feel like I've lost a bit of power down low. Maybe I'm just imagining it?

Either way...after new plugs, swapped coil pack positions, added catless downpipes, and switched maps from Stg1 Aggressive to Stg2 Aggressive, I'm no longer misfiring. The car feels good, just not quite as quick on the throttle as it did with Stg1 Aggressive.
interesting. As I am not stage 2 I can't say I anything about your loss of low end power (that would suck though, big time) But I'm glad they sorted everything out for you. I haven't had any issues since my coilpack went about 7k miles ago...still waiting for next ones to go out... we'll see!
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      05-16-2012, 06:48 PM   #1301
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Quote:
Originally Posted by Gdubz View Post
When I first got the car back, was still in Stage1 Aggressive. First thing I did was go top off my tank and switch maps to Stage2 Aggressive (just had catless downpipes installed). I gotta say that the car breathes a lot better, but I honestly feel like I've lost a bit of power down low. Maybe I'm just imagining it?

Either way...after new plugs, swapped coil pack positions, added catless downpipes, and switched maps from Stg1 Aggressive to Stg2 Aggressive, I'm no longer misfiring. The car feels good, just not quite as quick on the throttle as it did with Stg1 Aggressive.
that is interesting, never tried stage 1 on cobb as I was using procede back then.

Maybe I should try stage 1 and see if there is a loss...
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      05-17-2012, 02:34 AM   #1302
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Quote:
Originally Posted by Gdubz View Post
When I first got the car back, was still in Stage1 Aggressive. First thing I did was go top off my tank and switch maps to Stage2 Aggressive (just had catless downpipes installed). I gotta say that the car breathes a lot better, but I honestly feel like I've lost a bit of power down low. Maybe I'm just imagining it?

Either way...after new plugs, swapped coil pack positions, added catless downpipes, and switched maps from Stg1 Aggressive to Stg2 Aggressive, I'm no longer misfiring. The car feels good, just not quite as quick on the throttle as it did with Stg1 Aggressive.
I think you should do some miles to let it adapt I have the same feeling when I go from stock to stage 1 after few pulls and driving it goes away.
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      05-17-2012, 08:14 AM   #1303
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Why COBB not moving things forward already last few weeks (maybe even few months) 401 beta maps and that is it. Even their website not working correctly.
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      05-17-2012, 08:10 PM   #1304
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Quote:
Originally Posted by Gdubz View Post
When I first got the car back, was still in Stage1 Aggressive. First thing I did was go top off my tank and switch maps to Stage2 Aggressive (just had catless downpipes installed). I gotta say that the car breathes a lot better, but I honestly feel like I've lost a bit of power down low. Maybe I'm just imagining it?

Either way...after new plugs, swapped coil pack positions, added catless downpipes, and switched maps from Stg1 Aggressive to Stg2 Aggressive, I'm no longer misfiring. The car feels good, just not quite as quick on the throttle as it did with Stg1 Aggressive.
Did you try Stage 2 Linear throttle or stock throttle?
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      05-18-2012, 09:30 AM   #1305
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Originally Posted by ken1137 View Post
Did you try Stage 2 Linear throttle or stock throttle?
Come to think of it, I only had one Stage2 map for Aggressive on the Cobb AP. I remember seeing those choices for Stage1 and tried both out. You're definitely right, it feels more like a linear throttle map.

I'll check it out when I get off work today. Thanks for reminding me!
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      05-18-2012, 09:33 AM   #1306
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Honestly, there really isn't a big difference between Stage 1 and Stage 2. It only is more apparent when you go to Stage 2+FMIC where the difference is VERY noticeable.
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      05-18-2012, 11:33 PM   #1307
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I'm currently running the 4.01 Beta Stage 2+. Sometimes I notice when I'm starting from a stop and just driving normally, if I creep up to 3k RPM in second gear (maybe 20-30% throttle, I'll have to check next time) and then floor it, it just sounds loud but doesn't go anywhere. Feels like it has no power. But as soon as I'll shift into 3rd gear from 2nd in that scenario, all the power is there and wham, getting thrown into the back of my seat. However, if I just floor it immediately as I come into second without letting it creep up in the RPMs a bit first (not being light on the gas at all), then there's absolutely no issue with power delivery. Is this an issue with turbo setups, some sort of consequence of the way I'm driving it? Or is it possibly a problem with the Cobb 4.01 Beta? I also noticed the same thing when I was running the 4.01 stage 1.
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Last edited by Hambone; 05-18-2012 at 11:39 PM. Reason: Typo
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      05-19-2012, 02:59 AM   #1308
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Think cobb will do something stage 3 for meth?
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      05-20-2012, 05:21 PM   #1309
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Quote:
Originally Posted by Hambone View Post
I'm currently running the 4.01 Beta Stage 2+. Sometimes I notice when I'm starting from a stop and just driving normally, if I creep up to 3k RPM in second gear (maybe 20-30% throttle, I'll have to check next time) and then floor it, it just sounds loud but doesn't go anywhere. Feels like it has no power. But as soon as I'll shift into 3rd gear from 2nd in that scenario, all the power is there and wham, getting thrown into the back of my seat. However, if I just floor it immediately as I come into second without letting it creep up in the RPMs a bit first (not being light on the gas at all), then there's absolutely no issue with power delivery. Is this an issue with turbo setups, some sort of consequence of the way I'm driving it? Or is it possibly a problem with the Cobb 4.01 Beta? I also noticed the same thing when I was running the 4.01 stage 1.
I am running 4.0.1 beta, stage one and I have the same issue, part throttle acceleration is almost never "smooth", there always seems to be a bit of hesitation, then wham, I get a kick in the pants. It feels like driving my old RX7 FD when the second turbo would kick in at 4k RPM. Full throttle seems to be somewhat better, but it still hesitates on occasion. I never get any codes and I've changed out the plugs only a few K ago. The 3.01 maps were actually a bit worse, but that was before I got the plugs changed, so that could have exacerbated it. Flashing back to stock, everything is fine, silky smooth and strong. The only thing I ever notice in the logs is the "Load Actual" will often shoot well past the "Load Requested" and the "TSP Actual %" will dive down as the ECU cuts the gas. Is this just a symptom of the load targeting method that the Cobb/BMW is using and Cobb is just not quite there yet with balancing the power? I do have 56k on the motor and I'm going to look into getting the valves cleaned, maybe that will help. I'm tempted to switch to GIAC to see if their tune is better with my car. I'd be sad at losing the ability to remove the flash, adjust maps and log though. I'm holding out hope for a fix with the final 4.0.x maps.
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      05-20-2012, 05:24 PM   #1310
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I cleaned my valves at around 46K miles and it made a huge difference in the hesitation I was feeling. It was very noticeable. I have not tried the 4.01 beta maps yet so I cant say for sure if that could be your problem or not.
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      05-21-2012, 10:59 AM   #1311
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If the car has over 35k miles and the intake valves have never been cleaned from carbon build up, I would highly recommend having that done. The carbon build up can lead to symptoms like a sluggishly responding car and even misfires.

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      05-21-2012, 11:45 AM   #1312
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How long should valve cleaning take on the N54 and ~price?
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      05-21-2012, 11:49 AM   #1313
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How long should valve cleaning take on the N54 and ~price?
That will take anywhere from 3 to 5 hours to clean your valves and expect to pay anywhere from $400-$800 depending on where you have it done.

I recently had this done at 57k miles and it is a whole new car after the cleaning.
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      05-21-2012, 12:29 PM   #1314
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While I think the valve cleaning, changing plugs, and general maintenance things may help, I have been on various Cobb maps myself with new plugs/coils and I have to agree that the beta 4.01 maps are choppy as were the 3.01 maps. The only map that was smooth without what I would call a hicup and then acceleration was 2.03 which felt by far the best and seemed more powerful, but also gave me limp modes if ran to hard for too long. I'm not sure what the issue with the hiccup is, but It's is disappointing.
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      05-22-2012, 12:47 AM   #1315
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So I searched for an answer but couldn't find it. Guess I'll give asking here a shot.

When logging my car, I'm curious if having some cylinder timing correction is common. During hard pulls I'm seeing 2-3 degrees of cylinder timing correction in individual cylinders at times. Does this mean there are 4-6 knock counts in that specific cylinder?

The main "CAE" timing correction reads 0 the whole time, so I'm not sure which I should be looking at. Any help is appreciated, thanks!
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      05-22-2012, 10:50 AM   #1316
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I sent my logs to Cobb also thinking 2-3 degrees of timing correction might be a problem. They responded that it was normal and everything was healthy.
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      05-22-2012, 10:56 AM   #1317
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I sent my logs to Cobb also thinking 2-3 degrees of timing correction might be a problem. They responded that it was normal and everything was healthy.
you got rid of the jb4? i could've swore you were jb4 fo' 'lyfe
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      05-22-2012, 11:19 AM   #1318
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LOL, after i broke down with faulty injectors and had to remove the Jb4 on the side of the highway in the rain before i could call BMW road side assistance, i made the switch....
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      05-22-2012, 06:15 PM   #1319
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I sent my logs to Cobb also thinking 2-3 degrees of timing correction might be a problem. They responded that it was normal and everything was healthy.
Thanks for the input sir! Loveeee the way my car feels with cobb stage 1 right now!

Dyno'd 335whp 392 wtq (dynojet) Will be doing stage 2+ Fmic soon.

Very impressed with both cobb and the 135
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      05-22-2012, 06:59 PM   #1320
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LOL, after i broke down with faulty injectors and had to remove the Jb4 on the side of the highway in the rain before i could call BMW road side assistance, i made the switch....
Do you still think the jb4 is the smoothest, most reliable, and most powerful tune? Lol
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