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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 > How European Tuners prefer to performance tune the 335i



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      09-23-2009, 09:50 AM   #45
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fwiw, IMO the ár catted ceramic coated DPs are the "high quality / long term reliability" option here in comparison with an OEM w/ replacement insert.
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      09-23-2009, 10:10 AM   #46
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^ Agreed.

Seriously though... the Dual cone intakes not long term and reliable?
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      09-23-2009, 10:31 AM   #47
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Quote:
Originally Posted by marconi118 View Post
The OEM DPs have the flex part only becaude they are double wall cans. this is done to attenuate the turbo spinning sound. There is no need of flex section on single wall DPs
I think its because the vibrations. You don't want vibrations to propagate into the exhaust.

But...why are the OEM's double wall ? Possibly to maintain exhaust gas at a high temperature and less density thus increasing exhaust gas velocity and increasing the catalytic converter's efficiency ? There are so many small details that the aftermarket companies don't take into account.
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      09-23-2009, 10:51 AM   #48
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Vibration is an important issue, turbos need to be isolated from exhaust amplified stresses. But gaskets and other components are more significant than DP flex. Flex area does not appear designed to dampen vibration. It would fatigue and wear out. Heat expansion/contraction, installation fitment, heat insulation/cooling, and noise control are other design concerns.

In general I agree with Eugen & cstavaru that there are extremely complex engineering design issues that aftermarket companies are not equipped to deal with, and that sticking with OEM parts usually is a good idea. Exceptions include areas in which emissions and other regulations hamper OEM design, and cost constraints.
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      09-23-2009, 05:13 PM   #49
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I do agree with most of you, however, when you look at the engine and someone revs it you will see the whole engine turning a bit, including the turbos. This is mainly due to the rotating crank, normal physics. On the other hand the exhaust is bolted on the car. Now, what else than a flex section can compensate most of this engine movement ? I can't imagine that any of the aftermarket DP's will cover this issue, the hot sides and exhaust manifolds of the turbos will be stressed much more compared to stock DP's. Please correct me when I'm wrong.

Some old man in a VW crashed into my car today. My car stood still in front of a red traffic light, he simply did not break ... I will see the real damage once the rear bumper will be removed. The front of the VW did not look good at all, I'm surprised that my car seems not to be damaged that much.

Stay tuned !

Cheers,
Eugen
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      09-23-2009, 06:57 PM   #50
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Quote:
Originally Posted by Praemienhai View Post
Noelle/Evotech are doing this as well

Have you already checked your coolant temperature when pushing hard? Even going 280km/h+ on the Autobahn my coolant temperature is rd about 90C which is ok I assume. I'm running Evotech 400hp Flash, AR Catted DPs, VK Oilcooler, VK FMIC.
Did not check up to now, but will do. What have been your oil-temps when pushing hard ?
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      09-23-2009, 07:16 PM   #51
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Quote:
Originally Posted by cstavaru View Post
...
Can you please find out the exact brand and model of the catalysts used in the downpipes that worked in a stock and modded car ? I would be grateful for this information...
Sorry, not possible, will not get this information. Talk with the people of the other tuning company I posted. They do this mod as well, are aware about the 335i catalysts and provide high quality. I'm sure they would mod your DP's when you send them.
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      09-23-2009, 10:29 PM   #52
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Quote:
Originally Posted by e.n335 View Post
...
Some old man in a VW crashed into my car today. My car stood still in front of a red traffic light, he simply did not break ... I will see the real damage once the rear bumper will be removed. The front of the VW did not look good at all, I'm surprised that my car seems not to be damaged that much.

Stay tuned !

Cheers,
Eugen
That sucks!!! Good luck. Hope the old guy was OK. And your neck.
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      09-24-2009, 05:03 AM   #53
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Quote:
Originally Posted by e.n335 View Post
Did not check up to now, but will do. What have been your oil-temps when pushing hard ?
The max oil temperature I have seen on the street with the VK OC was 125 degrees C, but only when pushing really hard. On the Nordschleife rd about 130 degrees C.

In normal driving I see 110 degrees C, crusing constantly 200 km/h on the Autobahn 115-120 degrees C. I'm using Mobil1 0w-40
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      09-24-2009, 02:21 PM   #54
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Quote:
Originally Posted by Praemienhai View Post
The max oil temperature I have seen on the street with the VK OC was 125 degrees C, but only when pushing really hard. On the Nordschleife rd about 130 degrees C.

In normal driving I see 110 degrees C, crusing constantly 200 km/h on the Autobahn 115-120 degrees C. I'm using Mobil1 0w-40
Thank you very much for this info. I see 100 degrees C, on the autobahn 110 to 115 degC max. I still have to measure the coolant temps, but I might have achieved my goal already . This info is important for me, thus I didn't get the possibility to perform a long-term load since too much of traffic. The car is simply great.

All Noelle, Evotech, Daehler customers should upgrade to the lastest version ( mine , I came with the most recent ECU software ). Virtually no boost lag, strong car.

Thanks again,
Eugen
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      09-24-2009, 02:26 PM   #55
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merci!
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      09-24-2009, 03:50 PM   #56
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Quote:
Originally Posted by e.n335 View Post
Thank you very much for this info. I see 100 degrees C, on the autobahn 110 to 115 degC max
I confirm the same as above using the VKOilCooler on my car. Best support mod.

Dont need to worry on excessive temps anymore.
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      09-24-2009, 03:55 PM   #57
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Quote:
Originally Posted by e.n335 View Post
FMIC first ( provides noticeable additional power as well )
You sound really satisfied from your FMIC while I'm still sceptical in moving towards this step. May I ask which IC you currently use?
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      09-24-2009, 03:59 PM   #58
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Quote:
Originally Posted by Panoz View Post
I confirm the same as above using the VKOilCooler on my car. Best support mod.

Dont need to worry on excessive temps anymore.
Did the VK OilCooler replace your OEM or did your car not come with one?
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      09-24-2009, 04:08 PM   #59
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Quote:
Originally Posted by Panoz View Post
You sound really satisfied from your FMIC while I'm still sceptical in moving towards this step. May I ask which IC you currently use?
Code 3 / Spearco. Great mod. The original fitment issue of the first Spearco units for AT cars is solved, Spearco core is used, developed for this engine. Just istall it, my friend .
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      09-24-2009, 04:10 PM   #60
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Quote:
Originally Posted by kirby135i View Post
Did the VK OilCooler replace your OEM or did your car not come with one?
It is a replacement. Very effective and good fitment. Looks like the Dinan unit .
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      09-24-2009, 04:13 PM   #61
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Quote:
Originally Posted by kirby135i View Post
Did the VK OilCooler replace your OEM or did your car not come with one?
All European models comes with Oilcooler as standard. I just removed the crappy BMW one with the VK one. Once you compare the two oilcoolers you really wonder why BMW used such a crappy cooler in the first place.
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      09-24-2009, 04:21 PM   #62
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Quote:
Originally Posted by e.n335 View Post
Code 3 / Spearco. Great mod. The original fitment issue of the first Spearco units for AT cars is solved, Spearco core is used, developed for this engine. Just istall it, my friend .
Is there someone in Europe selling this in reasonable price(just to avoid the customs/taxation hassle)??
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      09-24-2009, 04:27 PM   #63
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Quote:
Originally Posted by Panoz View Post
Is there someone in Europe selling this in reasonable price(just to avoid the customs/taxation hassle)??
Don't think so ... Fedex makes customs easy ...
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      09-24-2009, 04:28 PM   #64
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Quote:
Originally Posted by marconi118 View Post
could all members contribute to fill in a list of European/UK flash tunes for N54?

This would be useful for European members and me to choose the right one.

As far as I know:

Noelle: alpina software expensive
Evotec: expensive
Giac: stage2 coming, dealers in UK + Paris France
ESS based in Norway


Of course the ideal solution is to find a near dealer to flash it over OBD or at home via laptop...
1.DMS
2.Evolve (currently also working on a switchable box that plugs into the OBD port in the car and enables you to switch between stock or tuned within minutes and also clears all codes)

http://www.e90post.com/forums/showthread.php?t=254282
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      09-24-2009, 04:42 PM   #65
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Quote:
Originally Posted by Panoz View Post
All European models comes with Oilcooler as standard. I just removed the crappy BMW one with the VK one. Once you compare the two oilcoolers you really wonder why BMW used such a crappy cooler in the first place.
mine has an oil cooler...but mine does run hot and was considering upgrading it.
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      09-24-2009, 05:44 PM   #66
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Quote:
Originally Posted by e.n335 View Post
Thank you very much for this info. I see 100 degrees C, on the autobahn 110 to 115 degC max.

Eugen
hey eugene, good to have you back !!

btw, i have the VK oil cooler also... but my normal oil temps are higher:
i see 118 C driving normal and hard highway cruising usually 120 C or a touch higer:

is this reduced cooling effect because of my 8000 feet altitude ??
or do i need to check the install (a shop did it).

thanks

p.s. you will love methanol if you do it
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