Jb4 or cobb access port?

bmwm3redblack · 04-13-2011, 07:25 AM

Hey guys i 've just bought bmw 335xi 6sp manual and i'm hesitating what tune to go. I would mostly use 91 or 93 octane so what is better and more powerful for everyday use?

Eric335xi · 04-13-2011, 02:33 PM

You might want to go over here and do some research on your own.

http://www.e90post.com/forums/forumdisplay.php?f=58

Everyone has their favorite and will battle it out until they prove theirs is the best. Get your riot gear on and good luck

Jeff@TopGearSolutions · 04-13-2011, 02:54 PM

Define better.

Performance all around will be similar on an otherwise stock car.

How the function and driveability will be different.

One is a piggyback tune that ties in the ECU

The other (cobb) is a flash tune that plugs into your OBD II port and loads a map.

If you want any further help we carry all the top tunes so I can find you one based on your needs budget and goals. Shoot me an email or PM.

UltraRacer13 · 04-13-2011, 05:43 PM

JB4 is not the best for your engine. It is also a pain to install/uninstall. I had the jb3, switched to the cobb when it came out. Dont take the hit like I did selling a used JB4. Buy the cobb. You will know immediately you made the right decision. I have the same car as you fyi.

04-13-2011, 07:25 AM	#1
bmwm3redblack Captain 64 Rep 886 Posts Drives: BMW ///M3 E46, BMW E92 335Xi Join Date: Jan 2011 Location: e13 osl iTrader: (0)	Jb4 or cobb access port? Hey guys i 've just bought bmw 335xi 6sp manual and i'm hesitating what tune to go. I would mostly use 91 or 93 octane so what is better and more powerful for everyday use?
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04-13-2011, 02:33 PM	#2
Eric335xi Enlisted Member 2 Rep 46 Posts Drives: '10 335i xDrive Join Date: Sep 2010 Location: WA iTrader: (0)	You might want to go over here and do some research on your own. http://www.e90post.com/forums/forumdisplay.php?f=58 Everyone has their favorite and will battle it out until they prove theirs is the best. Get your riot gear on and good luck
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04-13-2011, 02:54 PM	#3
Jeff@TopGearSolutions 3481 Rep 79,210 Posts Drives: C6 Z06, 09 335i, 10 335xi Join Date: Dec 2008 Location: www.TopGearSolutions.com iTrader: (37)	Define better. Performance all around will be similar on an otherwise stock car. How the function and driveability will be different. One is a piggyback tune that ties in the ECU The other (cobb) is a flash tune that plugs into your OBD II port and loads a map. If you want any further help we carry all the top tunes so I can find you one based on your needs budget and goals. Shoot me an email or PM.
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04-13-2011, 05:43 PM	#4
UltraRacer13 Wannabe Track Rat 71 Rep 930 Posts Drives: 17 OG M2 Join Date: Mar 2010 Location: Texas iTrader: (1)	JB4 is not the best for your engine. It is also a pain to install/uninstall. I had the jb3, switched to the cobb when it came out. Dont take the hit like I did selling a used JB4. Buy the cobb. You will know immediately you made the right decision. I have the same car as you fyi. __________________ 2017 OG M2
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