Z4 tuning

Tom (Atl) · 08-20-2012, 12:30 AM

I currently have a 335i (with the Cobb AccessPort).
I want to buy a used 2009 or 2010 z4 35i soon and install the Cobb tune on it.

I can hardly find any info at all on z4s running Cobb, and what I've found so far is a bit confusing.

Qs:
1) why is ESS preferred over Cobb seemingly (from browsing this forum, there's far more on ESS)?
2) Does the Cobb tune on the z4 deliver the same results as it does on the n54 335i?
3) Was the z4 35i made in 2009? I believe it was, but the Cobb website only lists compatibility with the 2010 z4. Not sure why. (reference: http://www.cobbtuning.com/BMW-Z4i-s/70510.htm )
4) Are there dyno results for the z4 with the cobb tune?

jparnes1 · 08-20-2012, 07:52 AM

2009 was the first year of production for the E89. That's about all I can help you with.

Jet96 · 08-20-2012, 03:57 PM

Yup, mine shows build date of May '09. Sorry, can't answer your other Q's

theanswriz42 · 08-22-2012, 03:06 PM

Why not just get a JB4?

Drew@Sonic MS · 08-22-2012, 04:15 PM

There's support for the 09, it'll be the same map as the 10 listed on their website. Results should be fairly similar to the 335i N54, but with DCT there's a little less gain to keep it within safe margins.

08-20-2012, 12:30 AM	#1
Tom (Atl) BMW Fan 147 Rep 315 Posts Drives: wego Join Date: Feb 2007 Location: Germany / US iTrader: (1)	Z4 tuning - cobb accessport Qs, and Cobb vs ess I currently have a 335i (with the Cobb AccessPort). I want to buy a used 2009 or 2010 z4 35i soon and install the Cobb tune on it. I can hardly find any info at all on z4s running Cobb, and what I've found so far is a bit confusing. Qs: 1) why is ESS preferred over Cobb seemingly (from browsing this forum, there's far more on ESS)? 2) Does the Cobb tune on the z4 deliver the same results as it does on the n54 335i? 3) Was the z4 35i made in 2009? I believe it was, but the Cobb website only lists compatibility with the 2010 z4. Not sure why. (reference: http://www.cobbtuning.com/BMW-Z4i-s/70510.htm ) 4) Are there dyno results for the z4 with the cobb tune?
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08-20-2012, 07:52 AM	#2
jparnes1 Colonel 243 Rep 2,387 Posts Drives: 2016 340i, 2012 Z4 35i Join Date: Jan 2010 Location: NY iTrader: (1)	2009 was the first year of production for the E89. That's about all I can help you with. __________________ 2016 340i XDrive, EBII/black, 6 MT, M Sport, Track Handling, Cold Weather, Tech, Lighting, Driver Assistance Plus. 2012 Z4 35i, ED 2/24/2012, Melbourne Red Metallic, Black Leather, Carbon Trim, 6MT, M Sport, CW, PP, PS, NAV, CA.
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08-20-2012, 03:57 PM	#3
Jet96 New Member 0 Rep 21 Posts Drives: 2009Z4 Join Date: Jul 2011 Location: MT iTrader: (0)	Yup, mine shows build date of May '09. Sorry, can't answer your other Q's
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08-22-2012, 03:06 PM	#4
theanswriz42 New Member 0 Rep 5 Posts Drives: 2010 Z4 sdrive35i Join Date: Jun 2012 Location: Atlanta, Ga iTrader: (0)	Why not just get a JB4?
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08-22-2012, 04:15 PM	#5
Drew@Sonic MS Captain 334 Rep 624 Posts Drives: F80 M3 Join Date: Apr 2012 Location: San Jose iTrader: (1)	There's support for the 09, it'll be the same map as the 10 listed on their website. Results should be fairly similar to the 335i N54, but with DCT there's a little less gain to keep it within safe margins.
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