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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Upgraded my Turbos



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      05-20-2012, 01:39 PM   #1
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Upgraded my Turbos

And my turbos happen to come with a free 911

I am ridiculously excited about my new toy and after some time behind the wheel, I wanted to give a quick review of the bmws I have driven (330i ZHP, 330ci ZHP, and 335i coupe) and the 911. Hopefully this info will help some folks looking at these cars.

First off, I wanted to add some back ground info in my experience with BMWs and performance modifications.

2003-2005 Ė 330i manual with performance package (ZHP) Ė mods = clears only.
2005-2008 Ė 330ci manual with zhp Ė I know, major change right. Ė Mods = nothing.
2008 to 2012 Ė 335i manual coupe with sports package. Mods = cobb stage 2+, AR downpipes, helix fmic, ER charge pipe, forge DV, EAS drop in filter, OEM front lip, tint, OSS Angel eyes with clear corners and blackout, oem gloss black kidneys, DIY black front mesh, painted reflectors, carbon fiber roundels, LED clear side markers, m3 shifter, breyton gts rims, and spacers for stance.

Next, I want to note that I am and likely will be a BMW driver at heart forever, from the very first test drive I have love everything that embodied driving a BMW . . . but sometimes change is good

On to the review (note Ė I will refer to the 330s as one, as they perform identically)

Power
The 330s with the zhp had a little more zip then the stand sports 330s due to increase hp and slightly modified gearing. The power was smooth and linear from the inline six, with power starting up at about 3k rpms with the final surge at 4.5k+ rpms. The engine never felt strained and pulled to redline flawlessly. The torque band was never weak, but was not an overpowering aspect of the engine. The car could pull in any gear though and loved to pull hardest at high speeds. The exhaust on the performance packages are amazing, giving you that low V8 growl from a straight six and sounding perfect at every rpm. With the monster hp numbers in the car market these days, a car as big as a 3 series with only 235 sounds under powered, but the 330 always felt perfectly balanced with the power to weight ratio.

The 335 with cobb 2+ is a whole separate beast. At a 12% drivetrain loss on my manual, it was putting out 450tq and 410 hp at the crank. It pulls like a truck starting from 2k rpm and only lets up north of 6k rpm, but still strong to 7k. The thrust of the third gear (1st spins 100% at wot and 2nd 85% of the time at wot) is intoxicating with how it slams you back and mottles the sense with the pure power. The engine is smooth, but has a roughness to it that the 330s didnít have. Itís not something I think I would have ever noticed, if I hadnít been driving a 330 for 5 years. It doesnít so much feel as if the engine is any less smooth, it just feels that the car is dealing with so much more power that itís straining under the force to get the car moving as fast as possible. The exhaust is much changed from the 330 with a more buzzier note when at moderate throttle (akin to a G35 or G37), but at full throttle and above 5k rpm it takes on an almost feral scream that I fear could get you unwanted attention. While catless, the exhaust could take on a slightly unrefined note that I didnít love at WOT, but under normal driving, it sounded amazing.

On a whole, I really like both engines, for the 330s ability to make me rarely want more then the buttery smooth 235hp that never seem weak and the 335s ability to pull like a truck in every gear while maintaining bmwís famous refinement. I will have to concede this aspect to the 335 for its amazing power and the simplicity to be tuned so well with ECU mods alone.

I do give the exhaust to the 330s though.

Handling
Again, the 330s with the PP had different suspicion set ups, and I canít speak for standard and sports versions of the 330s. In addition, the 330s PPs came standard with 18in rims and my 335 is on 19s.

Overall, both cars handle very well in overall precision and ride comfort. The 330 was slightly less refined then the 335, but both easy daily drivers.

However, the 330 had much less body roll and felt more sporty than the 335, and I assumed this was do to the PP suspension on the 330 and its smaller foot print. I was able to decrease some roughness of the 335iís ride by getting rid of the junk RFT. After four years on the 335i, I honestly have to put the 330 well above the 335.

Breaking
This oneís simple, both cars are amazing at stopping and both do it well. Tie there.

Gear Box
Again, this is simple, both are smooth and fun to shift. The clutch pick-up on each is slightly different, but nothing a 100 miles of driving couldnít fix.

Well I hope this may help someone, and feel free to PM with any questions on those considering change from a 330 to a 335.

Now onto the 911

Power
The first time I floored the 911 during a test drive in first, it felt like the hand of god reach down and give me a shove. The 911 is rated at 480hp and 460 tq with an overboost function allowing an additional 45tq. Unlike the cobb 335i that hit you with max tq then lessened due to the turbos running out of steam at the top end, the 911ís turboís donít stop until you hit red line. You get throwing back and the tack just shoots up and only increases as the variable turbos open op and push max boost. When you combine the awd and lighter weight, you understand the 0-60 numbers these cars are capable of and 100mph comes entirely too fast.

I plan to do at least an exhaust upgrade good for 25whp/wtq. Honestly, the exhaust on the 911 is a little lack luster. Its generally accepted that an exhaust is the very first mod on these cars, even before a flash. Itís the only aspect of the car that leave a bit to be desired on an otherwise amazing car. Once I have the exhaust, I will see how much trouble I can get in with that and go for a tune if/when I am ready

Handling
With the lack of an engine over the front wheels, it becomes quite obviously why these cars turn on a dime and can be placed spot on an apex. The car wants to drive around corners and just hold solid to the ground until you power through it. The ride is very much firmer than either of the bmws., but still does a very good job of dampening bumps and uneven roads. Impacts are absorbed very much like the bmws. When you hit the sports button to bring on the firmest setting, you get feed back on every grove and bump in the road. Whereas the 335i is like wearing comfy boots, the 911 on normal mode is like wearing driving shoes and sports mode is like being bare foot. Itís quite amazing how the car can communicate so much information through the chassis and stirring wheel.

On a scale of firmness, I would give the 335i sports suspension a 2, 330i zhp 4, 911 normal 5 and 911 sports 8.

Breaking
The car stops pretty abruptly, however, the Michelin ps2s have a lot to do with that. Brake feel is great, in line with the bmws.

Gear Box
The gear box on the 911 feels more robust than the bmws. Itís more notchy feeling than the bmws. The pick up distances on the clutch is longer than the bmws and is taking me longer to get used to. I am still getting used to it after 400 miles, but I would give this one to the bmws. The clutch pick up is very smooth, similar if not better than the bmws.

Lastly, hereís a couple photes of my ex-girl friend and my new gal.

Cheers
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2008 - 335i e92 - Cobb/AR/Helix/OSS (384 rwtq and 356 rwhp) - Retired

Last edited by mithiral67; 06-11-2012 at 12:33 PM.
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      05-20-2012, 01:49 PM   #2
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Your 335i looked better in those pics but the 911 is....no comment amazing car, good luck with it
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      05-20-2012, 01:53 PM   #3
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Dang, you got my dream car. Congrats!! Your 335 is a real beauty, as well. Is that a different front bumper? It's one of the nicest looking E92's I've seen.
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      05-20-2012, 02:05 PM   #4
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If ever there was a car worth trading up to, this is one. Well played.
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      05-20-2012, 02:11 PM   #5
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Quote:
Originally Posted by DefactoM6 View Post
If ever there was a car worth trading up to, this is one. Well played.
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      05-20-2012, 02:15 PM   #6
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Quote:
Originally Posted by jazze90 View Post
Your 335i looked better in those pics but the 911 is....no comment amazing car, good luck with it
Lol, i think thats a little photo magic there. I took the photos of the new car where my 335i were by some shutter bugs at our local meets. I will still need to do some tweaks to the the new car to make it look a little more aggressive and give the paint a better shine.
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2008 - 335i e92 - Cobb/AR/Helix/OSS (384 rwtq and 356 rwhp) - Retired
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      05-20-2012, 02:26 PM   #7
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congrats, its my favorite car ;-)
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      05-20-2012, 07:38 PM   #8
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Quote:
Originally Posted by cwhite
Dang, you got my dream car. Congrats!! Your 335 is a real beauty, as well. Is that a different front bumper? It's one of the nicest looking E92's I've seen.
That's the aero package...look at my sig. Looks like he blacked out the fog light grills and his car is extra shiny!

Very nice
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      05-20-2012, 07:44 PM   #9
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Great looking 335 but amazing upgrade!

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      05-20-2012, 07:57 PM   #10
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Awesome review, beautiful cars, and amazing pictures. Thank you sir!
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      05-20-2012, 08:38 PM   #11
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wow congrats!
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      05-20-2012, 09:00 PM   #12
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Quote:
Originally Posted by Zebra99 View Post
That's the aero package...look at my sig. Looks like he blacked out the fog light grills and his car is extra shiny!

Very nice
Yep, painted mesh and oem lip.

Yea, the silver on the porsches is deceptive in pictures. At first, it was a color I didnt like much cause i only saw photos of. Then when I saw it in person and I loved it. Pictures washout the color and make is all look light, but in person, it takes on very dark hues at angles and in the shadows. Those photos were done in direct sunlight and it really skews how good that color is.

And thanks all. The 335i, modded properly can look amazing, better than a lot of cars.

Last edited by mithiral67; 05-20-2012 at 09:08 PM.
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      05-20-2012, 10:38 PM   #13
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Ehhh.....ok that's the jealously talking
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      05-21-2012, 03:04 AM   #14
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my buddy has the same car (color, black wheels) but he has full exhaust and a tune. it is the fastest car i have ever been in. congrats, huge upgrade
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      05-21-2012, 08:27 AM   #15
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I love it! Great upgrade- I'm looking to get back into one of those as well (07/08 only, "forged everything"). It's the only car (including several Vipers, Z06's, f360, f430) that I've owned that I would compare to a GT-R and would buy again(the Turbo S PDK is better, faster, more responsive than the GT-R). Great choice, you will LOVE IT.
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      05-21-2012, 08:33 AM   #16
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I see what you did there (-_-)
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      05-21-2012, 09:23 AM   #17
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Originally Posted by itsmeek View Post
I love it! Great upgrade- I'm looking to get back into one of those as well (07/08 only, "forged everything"). It's the only car (including several Vipers, Z06's, f360, f430) that I've owned that I would compare to a GT-R and would buy again(the Turbo S PDK is better, faster, more responsive than the GT-R). Great choice, you will LOVE IT.
Yea, i tried the GTR and disliked almost everything about it. Way to rough and unrefined compared to what I was accustom too.

Yes, the Metgzer engine is why I went with the 997.1. Its likely to be the last race bred engine we will ever see again in a turbo. The engines supposed to be bullet proof and capable of huge power on stock internals, similar to the n54 has been proving.
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      05-21-2012, 09:39 AM   #18
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My old man recently bought the same car but in convertible with only 4,400 miles. He went with the EvoMS tune and the car is just a torque monster now.
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      05-21-2012, 02:42 PM   #19
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      05-21-2012, 02:51 PM   #20
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      05-21-2012, 07:02 PM   #21
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now go for a flash and you wake up the monster, then some modified vtg's on that 997 or even 30 alphas....this what i did with my 996tts and belive me no godzilla, computerzilla, f..zilla is going to beat the fun factor of your car , i use my e93 for DD, even with KW suspension and full mods+bigger turbos seems like a limo vs the Pcar. Congrats !
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      05-21-2012, 09:57 PM   #22
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Quote:
Originally Posted by CubanJJ09 View Post

^^^This.

I told my wife I wanted a 911...an air cooled one and she asked me: does it come with a warranty from the dealership? She obviously had no idea how old they were...but once she found out...it was quickly veto'd. Thus the 335i was born lol.

Next car will be a 964 or 993.

The 997 is an AMAZING car! I'm happy to hear you picked up a Turbo! The power that can be unlocked from that thing with a simple tune is insane!


Great pick up buddy. Enjoy!
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