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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 > N55 Spark plugs and maintenance



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      01-09-2013, 08:11 PM   #1
FrankiE90
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N55 Spark plugs and maintenance

How many you guys changed ur plugs
every 20k?
did mine at 60K.
any noticeable difference.



just want to see the kind of maintenance
u guys are doing.
any valve cleaning?
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      01-09-2013, 08:32 PM   #2
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I changed mine at 23k miles, was having a misfire after installing Cobb S1 Aggressive.
I had run Dinnan S2 for about 12k miles before i went to Cobb.
Misfire is now gone!
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      01-09-2013, 09:54 PM   #3
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Replaced at 28k
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      01-09-2013, 10:00 PM   #4
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Quote:
Originally Posted by Suds View Post
I changed mine at 23k miles, was having a misfire after installing Cobb S1 Aggressive.
I had run Dinnan S2 for about 12k miles before i went to Cobb.
Misfire is now gone!

ur a good man -
for changing em early.

felt a difference after changing mine.
night and day.
omg -

how did they look after 23K -
i know mine look like chit.
the dealer keep giving me the wrong plugs - n54 ones.
finally told them to use my VIN.


btw, how do u like ur Cobb tune over the Dinan.
is ur throttle response past 3k in 2nd and 3rd feel any different.
lot more dramatic in the mid range i'm guessing.
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      01-09-2013, 10:01 PM   #5
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Quote:
Originally Posted by 518N55 View Post
Replaced at 28k

tune, no tune.
how's ur driveablity - same, different, don't care.
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      01-09-2013, 10:13 PM   #6
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I have enjoyed both tunes, mainly from the added torque with a 6mt.
On the dyno the Cobb S1 gave simular numbers to the Dinnan S2.
The Cobb S1 Aggressive added about 20 + lb-ft torque at the low end and 20 to 30 hp at the top end over the Dinnan.
Both tunes are very smooth and fun to drive.

Last edited by Suds; 01-09-2013 at 11:17 PM.
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      01-10-2013, 01:20 AM   #7
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u dyno'd ur bimmer with the Cobb.
would be interested in seeing the curves.

must be fun at full wot. are u finding urself short shifting with the n55 to be in the powerband w Cobb?
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      01-10-2013, 01:26 AM   #8
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You need a new fuel pump.
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      01-10-2013, 01:30 AM   #9
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After installing the the stage 2 PPK, my dealership affixed a sticker to the engine which reads "Change spark plugs at 35,000 miles".
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      01-10-2013, 01:30 AM   #10
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Quote:
Originally Posted by FrankiE90 View Post
How many you guys changed ur plugs
every 20k?
did mine at 60K.
any noticeable difference.



just want to see the kind of maintenance
u guys are doing.
any valve cleaning?
You have 60k on your 2011???
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      01-23-2013, 05:26 AM   #11
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Quote:
Originally Posted by theriz View Post
You need a new fuel pump.
Who me? Lol.
Long crank - corrected itself.
I can hear the pump prime when I unlock the door.

It's still holding up-

Quote:
Originally Posted by Dozhdbog View Post
You have 60k on your 2011???
Yes.
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      01-23-2013, 12:57 PM   #12
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full bolt on and meth, JB4 ISO w/ flex fuel wires

Drivability seems more smooth and throttle is sharper...

But I also didn't have a choice, the car was misfiring on old plugs. I think every 20k is a must
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      01-23-2013, 02:50 PM   #13
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Quote:
Originally Posted by FrankiE90 View Post
Yes.
Damn, and I thought putting 35k on my 2011 in a year and a half was a lot.
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      01-24-2013, 12:47 PM   #14
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I'd also like to see that dyno with cobb. I've yet to see any independent results yet.
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      01-24-2013, 09:26 PM   #15
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Quote:
Originally Posted by Dozhdbog View Post
After installing the the stage 2 PPK, my dealership affixed a sticker to the engine which reads "Change spark plugs at 35,000 miles".
Interesting. stage 1 PPK sticker I got said 50k miles. Prob trying to avoid changing under warranty...if that's the case, just put 60k miles instead.
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      01-28-2013, 02:10 PM   #16
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Looks like I may need some spark plugs. I'm at 37K.
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      01-28-2013, 02:22 PM   #17
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Funny, I just called in to order my set also...and hot damn, that bitch is $34ish just for one plug from bmw!
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