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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 > DPs or FMIC ?? Which one first ??



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      04-16-2009, 04:37 PM   #1
emjei
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DPs or FMIC ?? Which one first ??

If money is the issue which one first....DPs or IC ???

Eventually both offcourse....
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      04-16-2009, 04:45 PM   #2
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i was about to get the IC first till i read post after post of people suggesting DP's first.. and it does make more sense honestly.
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      04-16-2009, 04:49 PM   #3
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This question has been asked a few times before.
Search for the results of those posts.

Most will say DP's for power, but IMHO FMIC for the more warranty friendly/safe, environmentally respectful, as well as reliability and prolonging of engine life. FMIC also allows more power and hugely combats heat soak which takes power away.
I wouldn't even get DP's. Not worth the hassle, warranty troubles, for 20 more hp, unless of course you are racing for prize or money and need every last bit of power the car is capable of.
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      04-16-2009, 04:51 PM   #4
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Id say Downpipes first because im more for performance. With or without other supporting mods i believe you will see respectively more gains with DP'S. If the area where you live though is always hot , IC maybe a good thing to think about ...
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      04-16-2009, 05:01 PM   #5
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Eventually both will be installed Im just getting a good deal on both but money for one...
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      04-16-2009, 05:08 PM   #6
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dp's first
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      04-16-2009, 05:10 PM   #7
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dp's
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      04-16-2009, 05:28 PM   #8
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DPs allow the turbos to spool faster, so it's not just about peak HP.
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      04-16-2009, 05:35 PM   #9
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get em' on both
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      04-16-2009, 05:46 PM   #10
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DPs = more less 30 HP

What about FMIC

BTW Im running JB3
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      04-16-2009, 05:48 PM   #11
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get half and half


well i live in Vegas where its gonna be 110 degrees soon. I want DPs for the power and performance, but for the sake of the car and with summer coming, IC first
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      04-16-2009, 05:51 PM   #12
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Garage List
2007 BMW 335  [9.00]
1)Tune
2)Intake
3)Catback
4)FMIC
5)DP's

That's the order I am going. Might not be the best order, but the DP's are the hardest to get out for a warranty issue. Hopefully 3 will be done next week and 4 within a month. 5 might wait until next spring, but they are calling my name.
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      04-16-2009, 05:59 PM   #13
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1) Tune
2) Intake
3) FMIC
4) DPs

That's the order I'm going thru. I'm still undecided on the benefits of a cat-back exhaust and whether its worth the cost/performance. There's no doubting the sound department, but I'm not so drawn to that aspect.
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      04-16-2009, 10:01 PM   #14
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People also keep pointing to the "performance" aspect of downpipes.
You take two identical otherwise stock cars, one with upgraded FMIC and one with catless DP's.
In the first race the catless DP car will probably pull 1-1.5 CL's in 40-120 run
On the second run the DP car will probably pull .5 CL's
On the third run the FMIC car will probably pull .5-1 CL
On the 4th run the FMIC car will probably pull 2+

Add the same tune (JB3 or PROcede) to those otherwise stock cars and the FMIC car will see the advantage even faster.

Throw the same cars on a track and the DP car will probably lap the first lap faster, the second lap will be probably equal and every following lap the FMIC car will have the advantage.
Heat soak is a bitch to these cars. Catless DP's doing nothing to combat it. Good upgraded FMIC does and therefore performance wise, if racing or tracking, it's the one that offers the better "performance" unless by performance you simply mean increase in power for 1 or 2 quick races or 1 lap at a track.

And again, not too many dealers will void warranties for upgraded FMIC that simply keeps the engine running cooler and therefore HELPS it and prolongs it life.
Catless DP's on the other hand, don't know of a single dealer that will be ok with them for any powertrain service work you need, and putting them on and taking them off is a bitch too.
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      04-16-2009, 10:12 PM   #15
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Ditto on the DPs being a bitch to install.
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      04-16-2009, 10:14 PM   #16
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Its a toss up which to do first, but if you live in a really HOT climate then I would go FMIC first.

Mike
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      04-16-2009, 11:43 PM   #17
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Do em all....
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      04-17-2009, 12:07 AM   #18
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I went with DPs first (because of power gains, quicker turbo spool). Now waiting for FMIC. If I lived in a very hot climate, I'd consider getting FMIC first.
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      04-17-2009, 12:08 AM   #19
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1. tune
2. Intake
3. DP's
4. (maybe IC)


thats me.
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      04-17-2009, 12:25 AM   #20
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Quote:
Originally Posted by scottp999 View Post
1)Tune
2)Intake
3)Catback
4)FMIC
5)DP's

That's the order I am going. Might not be the best order, but the DP's are the hardest to get out for a warranty issue. Hopefully 3 will be done next week and 4 within a month. 5 might wait until next spring, but they are calling my name.
thats what i did. but took a short cut n bought dp n sold it 4 months later with out installation haha.

got the tune, intake, bastuck exhaust with 2nd cat delete pipe...now i need to save for a FMIC den DP again if not DP before FMIC haha
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      04-17-2009, 02:34 AM   #21
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emjei, I know from experience how hot and humid is over there year-round. Get the FMIC first, it will definitely help with the reliability and longevity of your car. Even though TX is not as humid, I'm still considering getting the FMIC first.
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      04-17-2009, 04:51 AM   #22
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I used to think an intercooler was just a novelty item and not really as necessary as some thought, but there was no indepentent testing. Well, I decided I would do it. The bottom line is that we found the stock IC is extraordinarly bad. I am not sure an OEM item is worse. What I realized is that there are 4 things that must be done on this car. They are the non-negotiables... tune, downpipes, intercooler, and intake. After the tune, each is just as important as the next.
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