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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > Upgrades



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      03-25-2013, 07:25 PM   #1
odariel
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Upgrades

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Last edited by odariel; 04-14-2014 at 01:52 PM.
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      03-25-2013, 08:56 PM   #2
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I would say get the tune before the downpipe. I have the BMS downpipe and love it. No problems.
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      03-26-2013, 03:09 AM   #3
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1: intercooler
2: ducts
3: Redline 10W40 oil
4: exhaust wrap or ceramic coating of downpipes (or both!)
5: remove rear cowling of engine bay?
6: more aggressive engine cooling strategy (JB4?)
7: racing radiator
8: upgraded oil cooler
9: ???
10: profit
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      03-26-2013, 08:42 AM   #4
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What are your oil temps after a session?

I would do the intercooler first.

Last year I had no limp mode issues at the track with my N55 335i, even completely stock engine-wise.
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      03-26-2013, 01:50 PM   #5
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No suspension improvements?
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      03-26-2013, 03:52 PM   #6
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Quote:
Originally Posted by CJ421 View Post
What are your oil temps after a session?

I would do the intercooler first.

Last year I had no limp mode issues at the track with my N55 335i, even completely stock engine-wise.
Well, 135-140 degrees Celsius... 140-145 causes the limp mode...

I want o do these 3 mods at the same time... The only one I'm not sure about it's the downpipes.. Lets see if anyone can confirm if it will help with the temps..
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      03-26-2013, 03:56 PM   #7
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1. Intercooler

2. Bigger oil cooler

3. Limited Slip Diff

Worry about adding boost once the car doesn't go into limp mode after 15 minutes and it can actually put the stock power down out of corners.
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      03-26-2013, 05:01 PM   #8
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i see

Last edited by odariel; 04-14-2014 at 01:53 PM.
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      03-26-2013, 05:07 PM   #9
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Quote:
Originally Posted by Dozhdbog View Post
No suspension improvements?
Maybe

Last edited by odariel; 04-14-2014 at 01:52 PM.
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      03-26-2013, 06:47 PM   #10
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I don't think downpipes will do much for temperatures. The exhaust gasses are after the fact.

The intercooler is a very sensible upgrade.
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      03-26-2013, 09:17 PM   #11
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A limited slip utterly transforms this car. 10000 times more effective than any engine tune to a keen driver. That said, 80% of this board has a tune and 0.5% have a LSD.
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      03-28-2013, 02:02 AM   #12
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Quote:
Originally Posted by CombatNinja View Post
A limited slip utterly transforms this car. 10000 times more effective than any engine tune to a keen driver. That said, 80% of this board has a tune and 0.5% have a LSD.

That's at least in part due to costs.
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      03-28-2013, 06:49 PM   #13
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I've been on the track 2x15minute sessions with Wagner Intercooler , Cobb aggressive Tune, no problems...Would love Quaife LSD but quoted $3750 here in Australia!!! On the third and 4th runs I got two boost issue codes while traveling 200kph in 4th-5th.... On the straight!
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      05-14-2013, 04:12 PM   #14
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LSD, a real IC and oil cooler.

those ducts should helpout a lot off.
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      05-14-2013, 07:16 PM   #15
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      05-15-2013, 10:22 PM   #16
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I had a double stint on Sunday 35 minutes on track going at 100% temps only reached 130
10w 40 oil
and fmic are my only 'cooling' mods.

I do however remember needing to run cool down laps with stock oil and no fmic.
I would start with the oil
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