335i upgraded FMIC on 335d

neo871 · 07-09-2010, 06:14 AM

Does anyone know if one of the many aftermarket 335i FMCI would fit on a 335d? The OEM units are identical..

Thanks.

GreenPlease · 07-09-2010, 08:01 AM

If the OEM IC and piping are identical then any aftermarket unit will work. This is like a mathematical identity:

If A=B and B=C then A=C

Worst case scenario you might have to mess with the charge pipes. One thing you should note is that diesel cars run much higher boost levels so make sure your IC is pressure tested to at least 50psi for safety.

a32guy · 07-09-2010, 08:04 AM

Quote:

Originally Posted by GreenPlease

make sure your IC is pressure tested to at least 50psi for safety.

I'm fairly sure the 335d isn't running anywhere close to even half that.

dmurray14 · 07-09-2010, 09:08 AM

Quote:

Originally Posted by a32guy

I'm fairly sure the 335d isn't running anywhere close to even half that.

IIRC the 335d runs about 24-27 psi. So a little more than that, but not 50 psi! Though who knows where the tunes put that...

a32guy · 07-09-2010, 10:39 AM

Holy shit, way more than I would have imagined!

jblackwell · 07-09-2010, 08:01 PM

Diesels run huge PSI

GreenPlease · 07-09-2010, 10:59 PM

Boosted VW 1.9TDI run 38psi+

neo871 · 07-12-2010, 07:33 AM

is it possible to experience unwanted turbo lag if the aftermarket FMIC you get is not suited to the engine, like in my case?

David1 · 07-12-2010, 12:30 PM

I wonder if the 335D FMIC is bigger than the one in the 335i. The part number is different for it from the 335i.

GreenPlease · 07-12-2010, 12:39 PM

Quote:

is it possible to experience unwanted turbo lag if the aftermarket FMIC you get is not suited to the engine, like in my case?

Is it possible? Sure, but the volume increase would have to be pretty big. I'm thinking you'd have to double the volume of the tiny stock IC before you'd notice lag.

Quote:

I wonder if the 335D FMIC is bigger than the one in the 335i. The part number is different for it from the 335i.

Possibly but I'd bet that it's the same core with repositioned plumbing.

David1 · 07-12-2010, 12:50 PM

Quote:

Originally Posted by GreenPlease

Is it possible? Sure, but the volume increase would have to be pretty big. I'm thinking you'd have to double the volume of the tiny stock IC before you'd notice lag.

Possibly but I'd bet that it's the same core with repositioned plumbing.

I would think it would be bigger. I will need to to find one and pull it out and make some measurments.

neo871 · 07-13-2010, 02:17 AM

Although the part nos are different the actual parts are identical.

I was just wondering which model to choose considering the potential lag issues.

David1 · 07-13-2010, 08:55 AM

Quote:

Originally Posted by neo871

Although the part nos are different the actual parts are identical.

I was just wondering which model to choose considering the potential lag issues.

Would be nice to test them to see if one is better than the other.

Diego@Lutzperformance · 07-13-2010, 09:17 AM

If the parts numbers match, than yes. Any aftermarket FMIC will fir your 335D

GreenPlease · 07-13-2010, 10:18 AM

@OP

I hope you end up upgrading your IC. I'm really interested to see what the results are

neo871 · 08-01-2010, 05:59 AM

Quote:

Originally Posted by Diego@Lutzperformance

If the parts numbers match, than yes. Any aftermarket FMIC will fir your 335D

Are there any other aspects that should be taken in consideration besides the fitting issues? I mean, does the diesel engine require a different core size or shape? Or is it basically in need of as much cooling as possible, just like the 335i?

Could I experience an increased lag? This is what I am afraid of...

onefastman · 08-01-2010, 07:05 AM

I doubt you will have a problem with lag, ours are small as hell and guys are using hpf fmic's which are near double with no issues so you are fine.

My concern is would one of these things even fit (not piping but physically fit into the cavity where it is held). Only one way to find out I guess...

boom · 08-01-2010, 07:53 AM

The real question here is whether the diesel turbo(s) (I don't even know if it has one or two) will fit on the n54. 27psi on the n54 would be pretty ridiculous. In a good way.

BMWJT · 08-01-2010, 10:40 PM

I was looking into this. The 335i and 335d intercoolers are different part numbers from BMW and are actually different parts. The pipe connections in and out are different. They connect differently. (I looked at both at the same time on the lift.) However, since the aftermarket Intercooler uses usually silicone adapters to connect to the factory piping, I think that most of the 335i intercoolers would work well with maybe a change in the silicone hose connection.

itsbrokeagain · 08-01-2010, 11:14 PM

Quote:

Originally Posted by boom

The real question here is whether the diesel turbo(s) (I don't even know if it has one or two) will fit on the n54. 27psi on the n54 would be pretty ridiculous. In a good way.

They will not fit. A few reasons :

- they are mounted in a sequential fashion, much like the 4th gen Toyota Supras, the small turbo coming on first and the larger turbo providing the top end power.
- the A/R ratio of the turbine housings are bigger as well as the turbine wheel sizes are different. Would make for a bit of a laggy setup on a 10:1 compression gas engine, when it's designed for a diesel that's much higher (15:1 I think?)

neo871 · 08-02-2010, 04:32 AM

The OEM parts are identical (source: RealOEM.com), only the part #s are different.

roadkillrob · 08-02-2010, 07:59 AM

The Pics are the same, but the part numbers are different hence the parts are different in some way - BMW is good at keeping the part nubmers the same for identicle parts, so they are not the same even if the picture they used is!

07-09-2010, 06:14 AM	#1
neo871 Major 142 Rep 1,399 Posts Drives: 340i xDrive MPPSK Join Date: Jul 2005 Location: Bucharest, Romania iTrader: (0)	335i upgraded FMIC on 335d Does anyone know if one of the many aftermarket 335i FMCI would fit on a 335d? The OEM units are identical.. Thanks.
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07-09-2010, 08:01 AM	#2
GreenPlease Lieutenant Colonel 129 Rep 1,629 Posts Drives: BMW 335i e92 Join Date: Feb 2008 Location: Orlando Florida iTrader: (2)	If the OEM IC and piping are identical then any aftermarket unit will work. This is like a mathematical identity: If A=B and B=C then A=C Worst case scenario you might have to mess with the charge pipes. One thing you should note is that diesel cars run much higher boost levels so make sure your IC is pressure tested to at least 50psi for safety. __________________ Cars>Women
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07-09-2010, 10:39 AM	#5
a32guy First Lieutenant 25 Rep 374 Posts Drives: AW 335i Join Date: Dec 2009 Location: CT iTrader: (2)	Holy shit, way more than I would have imagined! __________________
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07-09-2010, 08:01 PM	#6
jblackwell Captain 52 Rep 811 Posts Drives: 335 Join Date: Nov 2009 Location: Cave Creek, AZ iTrader: (13)	Diesels run huge PSI __________________ '08 TiAg E90 335 M-Aero kit. - SOLD
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07-09-2010, 10:59 PM	#7
GreenPlease Lieutenant Colonel 129 Rep 1,629 Posts Drives: BMW 335i e92 Join Date: Feb 2008 Location: Orlando Florida iTrader: (2)	Boosted VW 1.9TDI run 38psi+ __________________ Cars>Women
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07-12-2010, 07:33 AM	#8
neo871 Major 142 Rep 1,399 Posts Drives: 340i xDrive MPPSK Join Date: Jul 2005 Location: Bucharest, Romania iTrader: (0)	is it possible to experience unwanted turbo lag if the aftermarket FMIC you get is not suited to the engine, like in my case?
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07-12-2010, 12:30 PM	#9
David1 Brigadier General 814 Rep 3,953 Posts Drives: 09 E92 09 X5 Join Date: Mar 2007 Location: Columbus, OH iTrader: (1)	I wonder if the 335D FMIC is bigger than the one in the 335i. The part number is different for it from the 335i. __________________ 2021 M2 Comp Sunset Orange \|Black with orange Stitching Dakota Leather\|Executive Pkg\|DCT
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07-13-2010, 02:17 AM	#12
neo871 Major 142 Rep 1,399 Posts Drives: 340i xDrive MPPSK Join Date: Jul 2005 Location: Bucharest, Romania iTrader: (0)	Although the part nos are different the actual parts are identical. I was just wondering which model to choose considering the potential lag issues.
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07-13-2010, 09:17 AM	#14
Diego@Lutzperformance 53 Rep 1,034 Posts Drives: bmw Join Date: Aug 2009 Location: Tampa/Lutz iTrader: (3)	If the parts numbers match, than yes. Any aftermarket FMIC will fir your 335D
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07-13-2010, 10:18 AM	#15
GreenPlease Lieutenant Colonel 129 Rep 1,629 Posts Drives: BMW 335i e92 Join Date: Feb 2008 Location: Orlando Florida iTrader: (2)	@OP I hope you end up upgrading your IC. I'm really interested to see what the results are __________________ Cars>Women
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08-01-2010, 07:05 AM	#17
onefastman Major General 159 Rep 5,689 Posts Drives: 2009 135i 2011 e92m dct Join Date: Sep 2009 Location: Earth iTrader: (15)	I doubt you will have a problem with lag, ours are small as hell and guys are using hpf fmic's which are near double with no issues so you are fine. My concern is would one of these things even fit (not piping but physically fit into the cavity where it is held). Only one way to find out I guess... __________________ Legal Disclaimer: Anything I or anyone else says about my vehicle on this website(1addicts.com or any affiliated or nonaffiliated sites), pertaining to modifications, is only to gain acceptance from my/our peers, and does not actually represent anything actually existing on my car, and thus, cannot be held against me in any issues, i.e. warranty claims, that may arise.
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08-01-2010, 07:53 AM	#18
boom My X5d tows my spec miata to the track. 74 Rep 1,254 Posts Drives: 2010 X5 35d Join Date: Sep 2009 Location: USA iTrader: (0)	The real question here is whether the diesel turbo(s) (I don't even know if it has one or two) will fit on the n54. 27psi on the n54 would be pretty ridiculous. In a good way.
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08-01-2010, 10:40 PM	#19
BMWJT New Member 0 Rep 6 Posts Drives: 2011 335d Join Date: Jan 2010 Location: plano, tx iTrader: (0)	I was looking into this. The 335i and 335d intercoolers are different part numbers from BMW and are actually different parts. The pipe connections in and out are different. They connect differently. (I looked at both at the same time on the lift.) However, since the aftermarket Intercooler uses usually silicone adapters to connect to the factory piping, I think that most of the 335i intercoolers would work well with maybe a change in the silicone hose connection.
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08-02-2010, 04:32 AM	#21
neo871 Major 142 Rep 1,399 Posts Drives: 340i xDrive MPPSK Join Date: Jul 2005 Location: Bucharest, Romania iTrader: (0)	The OEM parts are identical (source: RealOEM.com), only the part #s are different. Attached Images
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08-02-2010, 07:59 AM	#22
roadkillrob Major General 866 Rep 5,450 Posts Drives: 08 335i,22 X3M, 2012 C63 Black Join Date: Jul 2007 Location: Boston iTrader: (15)	The Pics are the same, but the part numbers are different hence the parts are different in some way - BMW is good at keeping the part nubmers the same for identicle parts, so they are not the same even if the picture they used is! __________________ 2022 X3M Brooklyn Grey 2008 E93 335i FBO 2012 Mercedes C63 Black Series Alanite Grey
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