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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > N55 cobb or Jb4



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      07-25-2013, 09:57 AM   #23
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Quote:
Originally Posted by FrankiE90 View Post
Bro.
Smell?
Yes hp gain.
Smell.
how much horsepower gain are those secondary cat deletes?
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      07-25-2013, 10:55 AM   #24
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Quote:
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how much horsepower gain are those secondary cat deletes?
Nothing you would feel. Maybe 5HP.
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      07-25-2013, 11:40 AM   #25
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lol that it?
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      12-25-2013, 04:47 PM   #26
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      12-25-2013, 08:26 PM   #27
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Cobb
Justification? Why is Cobb better?
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      12-25-2013, 09:04 PM   #28
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JB4 for most power output
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      12-25-2013, 10:51 PM   #29
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I've just installed the JB4 on my 2011 e92 335i xDrive. Before this, I had a 2012 WRX, for which I used a Cobb AccessPort.

First impressions are, wow! The JB4 really brings the car to life! The steering wheel controls are also awesome. Although I've never used the BMW version of the AP, I am routing for the JB4. It really knocked my socks off.
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      12-26-2013, 12:32 AM   #30
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i had the JB4 then switched to cobb when it came available. stage 2+ with e85 is great. cobb is working on developing a protuning method for the n55 which will max out your car and stay in safe ranges of boost
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      12-27-2013, 05:25 PM   #31
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Quote:
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i had the JB4 then switched to cobb when it came available. stage 2+ with e85 is great. cobb is working on developing a protuning method for the n55 which will max out your car and stay in safe ranges of boost
Yep I had the jb4 also, thing had good power but had glitches, especially map 5, So glad I have the Cobb V3 and so much easier to log and processes so fast, much smoother power, there is no difference in Power, all the jb guys like their product, I had both. Cobb FTW
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      12-27-2013, 05:35 PM   #32
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Yep I had the jb4 also, thing had good power but had glitches, especially map 5, So glad I have the Cobb V3 and so much easier to log and processes so fast, much smoother power, there is no difference in Power, all the jb guys like their product, I had both. Cobb FTW
yea the power delivery is more consistent to JB. dynos showed it too. they have great peak hp though
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      01-01-2014, 10:43 AM   #33
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Quote:
Originally Posted by XTR Performance
110% go for the Cobb AP V3. It's the new Accessport from Cobb .

-Chris
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      01-01-2014, 11:28 AM   #34
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Sorry guys, regardless of what you think the JB4 is faster for N55. I have the xdrive N55 world record @ 12.1 @ 111mph in my X1 SUV and I have stock exhaust, no meth, stock runflat tires. Cobb won't even get you low 12's in your lighter 335's.
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      01-01-2014, 12:01 PM   #35
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I've had both, my logs are way better with the Cobb, and being Protuned, my car is much faster then with the Jb4.. I liked it, but to many hickups. To each their own.. And Cobb V3 is much easier to log, more gauges, easier to tune.. And is safer for the car then a piggyback
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      01-01-2014, 12:08 PM   #36
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      01-01-2014, 02:30 PM   #37
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Quote:
Originally Posted by 335iFFM View Post
JB4 for most power output
Both have their merits but since the factory N55 turbo is so small the JB4 is easily able to maximize it. BMS recently tested a custom JB4 back end support flash running a lot higher timing values, richer fueling, and various load changes, and found basically no horsepower over the JB4 tuning alone.

I've yet to see a flash only N55 dyno put down close to these numbers but remember there are several JB4 N55 software versions and maps. So running a non-ISO on map 5 is not going to perform like an ISO on map 5, for example. It all comes down to how its setup, map used, mods, fuel, etc.

Those who think flash only will make more power over a properly setup JB4 are just mistaken. But a flash tune can make more power over a poorly setup JB4. The flash tune will never have the convenience of monitoring gauges in dash, auto tuning, the JB4's safety features, meth integration, E85 autotuning, on the fly boost limiting in lower gears, etc. Flash tunes are also more limited in the boost curves they can run and with timing post shift. That said they are not a bad option for someone looking for an install and forget it type thing who does not care about maximizing power output or the various features a JB4 gives you.

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      01-01-2014, 02:43 PM   #38
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People claiming the Cobb is smoother is one thing - it probably is. But it's objectively slower, and not by a little. Timeslips doesn't lie. Even protuned cars are mid-12's. I'm a full .5 seconds faster.
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      01-01-2014, 04:34 PM   #39
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Quote:
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People claiming the Cobb is smoother is one thing - it probably is. But it's objectively slower, and not by a little. Timeslips doesn't lie. Even protuned cars are mid-12's. I'm a full .5 seconds faster.
My slightly biased opinion (I resell both tunes) is it's a little smoother than integrated but not as smooth as ISO. It also suffers from the flash tune boost bomb where you get 90% of the boost at only 60% of the throttle input. While the JB4 ISO has a much more linear gas pedal to boost mapping. But I agree objectively speaking the N55 flash tunes are still way behind with regard to performance.

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      01-12-2014, 08:27 PM   #40
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Had Cobb stg2+ and switched to jb4. Very pleased with my decision. May get AP again to do back end flash
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      01-16-2014, 11:56 AM   #41
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Quote:
Originally Posted by FrankiE90
Quote:
Originally Posted by Entrust View Post
How do I delete intake mod? Using jb4, also I have bms catless down pipes and muffler delete, ur talking about the resonator in mid section of car like middle ?

http://<a href="http://www.e90post.c...stcount=75</a>


This is xi n55 exhaust -
The two round cats up top. Kill that and add back ur muffler for some bck pressure.
Just a suggestion.
[IMG]http://lh3.ggpht.com/_s1AC4virS24/TH...28Large%29.JPG[/IMG]
Back end pressure does not apply to forced induction cars, only on n/a engines .. Actually in a lot of cases a muffler delete can help spool up a turbo a bit quicker.. Look into it .. I also was thinking like you until I learned otherwise. But concerning the OP what kind of power are you looking for? Log to see if you are reaching target? You seem to not think your n55 is fast with those mods.. like mike said before you consider throwing your money at cobb , take another look at your setup with the jb4 like map and firmware version are big ones obv

Last edited by Andrewe92; 01-16-2014 at 12:02 PM.
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