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E90/E91/E92/E93 (2006 - 2013)
The E9X is the 4th evolution of the BMW 3 series including a highly tuned twin turbo 335i variant pushing out 300hp and 300 ft. lbs. of torque. BMW continues to show that it sets the bar for true driving performance! -- View the E9X Wiki

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  #1  
Old 06-24-2014, 04:41 PM
phix90 phix90 is offline
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Bmw 335IS cobb tune experiences?

Hey guys,

Typing "bmw 335is" into google is a nightmare as it just brings up 335i's thinking the "IS" plural. Can't find much info when I try to look up the IS with a cobb tune.

I understand my car is already tuned and has more cooling features to support the extra power from factory. However, would I still see a drastic gain with a cobb tune like people who have a standard 335 gain? Only interested in cobb as my car is under warranty and I will not change out the JB4 every time I have to go in for service.

Please note this is my daily driver (more like weekend) I like a good spirited drive but I don't plan on tracking the car. Just looking to take it to the next level add more some power.

Thank you.
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  #2  
Old 06-25-2014, 10:34 AM
Alpineweissmatt Alpineweissmatt is online now
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I am also curious about this. I'm looking to do the same with my 335is and want to know if there are custom tunes that can harness the additional cooling capabilities of the IS.

Looking forward to the responses...
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  #3  
Old 06-25-2014, 11:19 AM
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rdkind62 rdkind62 is online now
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I have a 335is with a Cobb tune and I can say that you will have more HP and more usable tq in everyday driving. I am using an OTS map with 91 octane gas because that is the highest we have available here in Colorado, and I took my car and got it dyno'ed after I installed the Cobb and got 306 hp and 341 tq. at the rear wheels. Keep in mind that the car, even though it is turbo charged, still loses a bit of performance at my altitude (although not as much as a NA car) and that I have 91 octane gas and I think it isn't all that bad. If you consider there is a 15% loss in the drive train then we are talking around 352 CHP. Even though you have the temporary boost to 370 tq for 7 seconds standard you will have more tq readily available without having to floor it and get it to kick in temporarily. While you will not see as big of gains as a standard 335i because the OTS map is using the baseline of the N54 engine and it doesn't matter if you are starting from a 335i or a 335is. Overall, I like it and it is nice for a little extra HP and tq for a DD.
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File Type: pdf DYNO reading HP and TQ.pdf (264.1 KB, 12 views)
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  #4  
Old 06-25-2014, 11:34 AM
phix90 phix90 is offline
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hmm, doesnt seem worth the $900 to me then.

You're saying if you put 93 octane fuel in the tank you can run more agressive maps?

Also what is the deal with the FMIC (front intercooler) that they are trying to sell on their site. I thought the IS already had added cooking capability.
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  #5  
Old 06-25-2014, 11:43 AM
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Quote:
Originally Posted by phix90 View Post
hmm, doesnt seem worth the $900 to me then.

You're saying if you put 93 octane fuel in the tank you can run more agressive maps?

Also what is the deal with the FMIC (front intercooler) that they are trying to sell on their site. I thought the IS already had added cooking capability.
Yes, if you have 93 octane you will use a more aggressive map, and the "is" does have a FMIC but there are better ones that provide better cooling. If I were you, and you wanted to try it there are usually several people on various forums that are willing to sell their JB4 or Cobb tunes for a decent price. I happened to get mine from someone that had wrecked their car and bought something else. Mine cost $475 which is about the same as a JB4. Just make sure that if you buy the Cobb tune from someone that it is unmarried prior to them sending it to you or it will be worthless.
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  #6  
Old 06-25-2014, 12:23 PM
phix90 phix90 is offline
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Interesting. So basically with an IS all you need to do is run 93 octane and you can try better maps.

Yeah I'm not paying retail for that thing! Would rather get a V2 for like $400 or something if I can find one. Thanks for the tip
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  #7  
Old 06-25-2014, 12:45 PM
Alpineweissmatt Alpineweissmatt is online now
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Does this mean you can run the maps specific to cars upgraded with an FMIC on an IS because it already has one?
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  #8  
Old 06-25-2014, 12:48 PM
phix90 phix90 is offline
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Quote:
Originally Posted by Alpineweissmatt View Post
Does this mean you can run the maps specific to cars upgraded with an FMIC on an IS because it already has one?
That is what I interpreted that as.

Basically with Stage one for an IS the gains are tiny 8% for HP and 6% for TQ

with stage 2 it ramps to whopping 31%/21% HP/TQ respectively. That puts the HP at like 419 if you add in the 31% bump



Application Years Stage1 Gains Stage2+FMIC Gains
BMW 335is 2011-2013 Aggressive: 8%HP / 6%TQ Aggressive: 31%HP / 21%TQ
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  #9  
Old 06-25-2014, 05:53 PM
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I'm pretty sure that you need an upgraded FMIC if you re going to use the Stage 1 + FMIC. I don't think our standard IC is good enough. From the Cobb page:

Stage1 + COBB FMIC Intended for vehicles equipped for the following hardware *:
***61623; Requires COBB front-mount intercooler

Stage2 Intended for vehicles equipped for the following hardware *:
***61623; Requires upgraded downpipe.
***61623; Upgraded cat-back exhaust system recommended
***61623; Upgraded intake system (DCI, panel filter or otherwise) recommended

Stage2 +FMIC Intended for vehicles equipped for the following hardware:
***61623; Requires COBB front-mount intercooler.
***61623; Requires COBB downpipes or equivalent
***61623; Upgraded cat-back exhaust system recommended
***61623; Requires Upgraded intake system (DCI, panel filter or otherwise)
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  #10  
Old 06-25-2014, 07:16 PM
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CALWATERBOY DUE CALWATERBOY DUE is offline
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Quote:
Originally Posted by phix90 View Post
Hey guys,

Typing "bmw 335is" into google is a nightmare as it just brings up 335i's thinking the "IS" plural. Can't find much info when I try to look up the IS with a cobb tune.

I understand my car is already tuned and has more cooling features to support the extra power from factory. However, would I still see a drastic gain with a cobb tune like people who have a standard 335 gain? Only interested in cobb as my car is under warranty and I will not change out the JB4 every time I have to go in for service.

Please note this is my daily driver (more like weekend) I like a good spirited drive but I don't plan on tracking the car. Just looking to take it to the next level add more some power.

Thank you.

Set your Google to "335is" Cobb tune

Better? You're welcome in advance.
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  #11  
Old 06-25-2014, 10:00 PM
phix90 phix90 is offline
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Well what could I expect with the stage 1 Aggressive 93 oct?(the highest I could go with no mods)

And what exactly would ocurr if I did run a stage 2?

Thanks
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  #12  
Old 06-26-2014, 07:57 AM
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rdkind62 rdkind62 is online now
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Quote:
Originally Posted by phix90 View Post
Well what could I expect with the stage 1 Aggressive 93 oct?(the highest I could go with no mods)

And what exactly would ocurr if I did run a stage 2?

Thanks
Honestly, I couldn't tell you what would happen. I suspect it would work but not with optimal performance. The Cobb website has a link where you can ask them questions and they have always responded to me within 24 hours or so. They are very helpful, and if you buy their product they will even do a custom tune for your car if you just download some information from your car and send it to them in an e-mail.
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  #13  
Old 06-26-2014, 08:03 AM
phix90 phix90 is offline
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Thank you I have sent them an e-mail.
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