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Thread: Keeping my 335, stock exhaust question

              
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    Keeping my 335, stock exhaust question

    After a lot of thought, looking at m3's and various other cars, I've decided to just keep my 335 and have fun with it for a couple more years. I was scheduled to part it out tomorrow and already swapped my vanguard exhaust for a stock exhaust. But honestly, I'd rather save money and just enjoy my 335.

    I'm thinking of just keeping the stock exhaust and getting a protune from PTF @dzenno@protuningfreaks My question is, can I run a stg 2 fbo cobb tune with the stock exhaust? I love the refined sound and never realized how much the vanguard annoyed me. Can I modify the stock exhaust to be more free flowing and keep the refined sound? I'm also going to get coil overs....but that's another thread all together.

    I know I've read about people modifying thier stock exhaust, I just forget if they can run the fbo cobb stg 2 tune with it...

    Evolve Supercharged ///M3

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    Yes, an exhaust is not required for COBB Stage 2+. You can remove the secondary cats for better flow, but might want to replace it with resonators just in case it rasps.

    Stage2+FMIC Maps (Map Notes)
    DRIVE MAPS - Daily driving map with nice bump in power. Stock rev limiter.
    Map Name Fuel Intake IC DP CBE Rev. Link
    Stg2+FMIC ST Drive I8A0S v402
    Stock Throttle
    Prem
    91
    Req Req Req Sug 4.02 [map]
    Stg2+FMIC LT Drive I8A0S v402
    Linear Throttle
    Prem
    91
    Req Req Req Sug 4.02 [map]
    SPORT MAPS - Sporty map with a healthy performance increase. Raised rev limits.
    Map Name Fuel Intake IC DP CBE Rev. Link
    Stg2+FMIC ST Sport I8A0S v402
    Stock Throttle
    Prem
    91
    Req Req Req Sug 4.02 [map]
    Stg2+FMIC LT Sport I8A0S v402
    Linear Throttle
    Prem
    91
    Req Req Req Sug 4.02 [map]
    AGGRESSIVE MAPS - Maximum power and torque. 93 octane fuels and above. Raised rev limits.
    Map Name Fuel Intake IC DP CBE Rev. Link
    Stg2+FMIC ST Aggrssv I8A0S v402
    Stock Throttle
    Prem
    93
    Req Req Req Sug 4.02 [map]
    Stg2+FMIC LT Aggrssv I8A0S v402
    Linear Throttle
    Prem
    93
    Req Req Req Sug 4.02 [map]

    LEGEND
    IC: Intercooler requirement.
    DP: Downpipe requirement.
    CBE: Catback Exhaust requirement.
    Any: Either the stock or an upgraded part can be used without a negative impact to performance or operation.
    Sug: Suggest replacing stock part with upgrade for maximum performance. Not required for safe operation.
    Req: Required that the stock part is upgraded to ensure safe operation and proper performance.
    2010 e92 M3 Jet Black | DCT | ESS Tuned | Akrapovic Slip-on | Challenge X-pipe | AFE Intake | 18" Volk TE37SL | KW V3 Coilovers | RPI Scoops | Under Drive Pulley

    2007 e92 Mont. Blue 335i | 6MT | COBB Tuned | Quaife 3.46 LSD | Helix FMIC | AA DPs | HKS Exhaust | DCI | Stett CP w/ Forged DVs | KWv2 Coilovers | UUC Sway Bars & SSK | HPF Stg 2 Clutch | HFS-4 | M3 Suspension Bits | DEFIVfab Diff Lockdown Kit | Stoptech Trophy BBK

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    No problem whatsoever. I have a 135i which has a more restrictive exhaust and I don't have any issues running the Stage 2+ maps.

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    One thing I'd suggest on the stock exhaust is to possibly get a set of high flowing 200 cel race cats from Vibrant, metal core, here's a link:

    http://vibrantperformance.com/catalo...roducts_id=856

    Many people have welded these in instead of the OEMs on the rear...much better flow and works well enough to reduce smoke/noise as well as eliminate smell


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    Click here to enlarge Originally Posted by bobS Click here to enlarge
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    After a lot of thought, looking at m3's and various other cars, I've decided to just keep my 335 and have fun with it for a couple more years. I was scheduled to part it out tomorrow and already swapped my vanguard exhaust for a stock exhaust. But honestly, I'd rather save money and just enjoy my 335.

    I'm thinking of just keeping the stock exhaust and getting a protune from PTF @dzen no@protuningfreaks My question is, can I run a stg 2 fbo cobb tune with the stock exhaust? I love the refined sound and never realized how much the vanguard annoyed me. Can I modify the stock exhaust to be more free flowing and keep the refined sound? I'm also going to get coil overs....but that's another thread all together.

    I know I've read about people modifying thier stock exhaust, I just forget if they can run the fbo cobb stg 2 tune with it...
    Yes I made 430whp 499wtq on stock exhaust.




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    Click here to enlarge Originally Posted by dzenno@ProTUNING Freaks Click here to enlarge
    This quote is hidden because you are ignoring this member. Show Quote
    One thing I'd suggest on the stock exhaust is to possibly get a set of high flowing 200 cel race cats from Vibrant, metal core, here's a link:

    http://vibrantperformance.com/catalo...roducts_id=856



    Many people have welded these in instead of the OEMs on the rear...much better flow and works well enough to reduce smoke/noise as well as eliminate smell
    Ok so you weld these in place of the stock cats on the oem exhaust? I still have my 3 inch AR cat less dp's installed. Strange thing is, my wg rattle is pretty much gone with the OEM exhaust

    Evolve Supercharged ///M3

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    Click here to enlarge Originally Posted by bobS Click here to enlarge
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    Ok so you weld these in place of the stock cats on the oem exhaust? I still have my 3 inch AR cat less dp's installed. Strange thing is, my wg rattle is pretty much gone with the OEM exhaust
    Yes, these would go in place of your OEMs. I believe ar design uses these same cats on their catted downpipes.

    In terms of rattle, its louder when catless as a full catless exhaust serves like an amplifier Click here to enlarge


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    I see.... Are you going to be in NJ/NY anytime soon? I'd like to get a protune with these cats installed....

    Evolve Supercharged ///M3

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    I'll double check with Jake, think he's planning a trip up there for a tuning weekend soon


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    Perfect! Let me know!

    Evolve Supercharged ///M3

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    Definitely!


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    Click here to enlarge Originally Posted by bobS Click here to enlarge
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    After a lot of thought, looking at m3's and various other cars, I've decided to just keep my 335 and have fun with it for a couple more years. I was scheduled to part it out tomorrow and already swapped my vanguard exhaust for a stock exhaust. But honestly, I'd rather save money and just enjoy my 335.

    I'm thinking of just keeping the stock exhaust and getting a protune from PTF @dzen no@protuningfreaks My question is, can I run a stg 2 fbo cobb tune with the stock exhaust? I love the refined sound and never realized how much the vanguard annoyed me. Can I modify the stock exhaust to be more free flowing and keep the refined sound? I'm also going to get coil overs....but that's another thread all together.

    I know I've read about people modifying thier stock exhaust, I just forget if they can run the fbo cobb stg 2 tune with it...
    Not really OT, but weren't you already protuned by the sadly late Chris@EFILogics? If I were you, I'd sell the Vanguard, get a HFS-4, and have Jake or Dzenno give you a 93+Meth tune.

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    I was.....rip

    The vanguard is already sold.... I want a protune for my OEM exhaust setup. I prob could runthe EFI protune withoutthe vanguard, but I'd rather get a new protune just to be safe...

    Evolve Supercharged ///M3

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    I've been looking into a new exhaust setup for a while and what I'm planning on doing is putting in a pair of boost operated cutouts in the midpipe right before the cats.

    Stock volume at idle and cruise but loud as $#@! when beating on it.

    https://www.himni-racing.com/index.p...roducts_id=764

    MOTIV750, MOTIV P-1000 PI, MOTIV/FUEL-IT! low pressure fuel system, AEM EMS/COBB AP, Aquamist HFS-3, ETS FMIC, SPEC stage 3+ clutch/SS flywheel, BC Racing coilovers and VMR wheels wrapped in Hankook RS3s.

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    No room unfortunately..tried it as well Click here to enlarge


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    I'm assuming the OEM exhaust is pretty free flowing if cobb allows a stg 2 aggressive tune with it. DZ, do you know how much hp/tq is lost by being fbo and keeping the OEM exhaust, in comparison to a catback like the vanguard exhaust system? I'm guessing it isn't much....

    Evolve Supercharged ///M3

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    What gets in the way? The body or the exhaust pipes cause interference?

    MOTIV750, MOTIV P-1000 PI, MOTIV/FUEL-IT! low pressure fuel system, AEM EMS/COBB AP, Aquamist HFS-3, ETS FMIC, SPEC stage 3+ clutch/SS flywheel, BC Racing coilovers and VMR wheels wrapped in Hankook RS3s.

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    Click here to enlarge Originally Posted by bobS Click here to enlarge
    This quote is hidden because you are ignoring this member. Show Quote
    I'm assuming the OEM exhaust is pretty free flowing if cobb allows a stg 2 aggressive tune with it. DZ, do you know how much hp/tq is lost by being fbo and keeping the OEM exhaust, in comparison to a catback like the vanguard exhaust system? I'm guessing it isn't much....
    I have seen 6-12whp gain on 335s from a $1500+ exhaust.

    Click here to enlarge Originally Posted by rader1 Click here to enlarge
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    I've been looking into a new exhaust setup for a while and what I'm planning on doing is putting in a pair of boost operated cutouts in the midpipe right before the cats.

    Stock volume at idle and cruise but loud as $#@! when beating on it.

    https://www.himni-racing.com/index.p...roducts_id=764
    Those are bad ass, has anyone tested these?




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    Click here to enlarge Originally Posted by bobS Click here to enlarge
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    I'm assuming the OEM exhaust is pretty free flowing if cobb allows a stg 2 aggressive tune with it. DZ, do you know how much hp/tq is lost by being fbo and keeping the OEM exhaust, in comparison to a catback like the vanguard exhaust system? I'm guessing it isn't much....
    Not much..up to 400whp on a coupe will not see measurable gains as far as i've seen...135i though is a dufferent story

    Click here to enlarge Originally Posted by rader1 Click here to enlarge
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    What gets in the way? The body or the exhaust pipes cause interference?
    Both really, just no room but maybe you can find a way


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    Lol.....good, I won't miss the booming catback exhaust sound one bit

    Evolve Supercharged ///M3

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    Click here to enlarge Originally Posted by bobS Click here to enlarge
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    I'm assuming the OEM exhaust is pretty free flowing if cobb allows a stg 2 aggressive tune with it. DZ, do you know how much hp/tq is lost by being fbo and keeping the OEM exhaust, in comparison to a catback like the vanguard exhaust system? I'm guessing it isn't much....
    Bob -- I'm still running the stock DP-back exhaust & you saw my numbers for both the 93 octane & E85-blended ProTunes. I'm also interested in getting a Race Gas ProTune by Jake once he gets in the area, maybe get it done on Undercover's dyno. I know over on E90Post (and I'm sure also here on BB), there are lots of N54 & N55 COBB users who'd like local ProTunes done by the PTF team
    COBB AP ProTune by Bren of ///Bren Tuning
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    Click here to enlarge Originally Posted by rader1 Click here to enlarge
    This quote is hidden because you are ignoring this member. Show Quote
    I've been looking into a new exhaust setup for a while and what I'm planning on doing is putting in a pair of boost operated cutouts in the midpipe right before the cats.

    Stock volume at idle and cruise but loud as $#@! when beating on it.

    https://www.himni-racing.com/index.p...roducts_id=764
    Thats badass! Make it fit.

    Click here to enlarge Originally Posted by bobS Click here to enlarge
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    Lol.....good, I won't miss the booming catback exhaust sound one bit
    Glad you decided to keep the 335! Nothing can beat it at its price point, IMO. What suspension/rims are you on now? Looks awesome...

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    I think you made the right choice btw. No need to waste money right now if it can be avoided. Just enjoy what you already have.

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    Click here to enlarge Originally Posted by benzy89 Click here to enlarge
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    Bob -- I'm still running the stock DP-back exhaust & you saw my numbers for both the 93 octane & E85-blended ProTunes. I'm also interested in getting a Race Gas ProTune by Jake once he gets in the area, maybe get it done on Undercover's dyno. I know over on E90Post (and I'm sure also here on BB), there are lots of N54 & N55 COBB users who'd like local ProTunes done by the PTF team
    On stock turbo's mike@PRS (my pro-tuner) said he couldn't get any more than the E50 map

    I even brought 15 gal of Vp109 to do our dyno tune. Never used it.




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    Click here to enlarge Originally Posted by E90SoFlo Click here to enlarge
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    On stock turbo's mike@PRS (my pro-tuner) said he couldn't get any more than the E50 map

    I even brought 15 gal of Vp109 to do our dyno tune. Never used it.
    Is he guessing or are there any dynos supporting this? On safe, quality tuning, running 100% E85 is comparable to running C16 Race Gas, but the N54 still doesn't have a proven, established fueling system to support straight E85. From a safe, tuning perspective, I think that running Race Gas (MS109 or higher octane) offers more gains that won't fluctuate (MS109 will always be 109 octane, E85 can vary anywhere between 70-85% ethanol).
    COBB AP ProTune by Bren of ///Bren Tuning
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