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Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 02-08-2012, 07:44 AM   #1
jared_wiesner
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Spark plugs in modified N/A

I was just wondering what you guys are running in your modified N/A motors for spark plugs. I just switched to NKG BKR7E plugs last night with great results. The car feels more responsive and definitely feels to have gained some torque down low and through midrange. I actually think its making a bit more power everywhere. I only have headers, b30 intake and a long tube cai.

The BKR7E is a step colder than the BKR6E which is the equivilent single prong copper plug to the 4 prong platinum BKR6EQUP.

I can only imagine that a step colder plug like the BKR7E would make even more difference in those with cams and software.

So, what have you guys tried in your E46's?

Last edited by jared_wiesner; 02-08-2012 at 09:41 AM.
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Old 02-08-2012, 10:42 AM   #2
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NGK BKR7EIX


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Nitrous is a little trickier than boost, but it's not the spray that kills motors, it's STUPIDITY!!
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Old 02-08-2012, 10:46 AM   #3
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Ah ok so the iridium equivilent of what I put in. Do you think there is any performance to be gained or lost going with iridium or just the longevity factor?
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Old 02-08-2012, 10:59 AM   #4
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It's thought that the iridium plug is worth 1 to 2 HP over a standard plug, maybe it is maybe it's not. Fresh plugs almost always feel better than old spent plugs.
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Nitrous is a little trickier than boost, but it's not the spray that kills motors, it's STUPIDITY!!
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Old 02-08-2012, 11:10 AM   #5
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It's thought that the iridium plug is worth 1 to 2 HP over a standard plug, maybe it is maybe it's not. Fresh plugs almost always feel better than old spent plugs.
Fair enough! I'm sure some of my difference is pulling out older plugs in favour of new. But I did notice some torque loss with headers and the b30 manifold that corellated to installing those modifications. These plugs have almost, if not totally reversed that feeling.
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Old 02-08-2012, 11:26 AM   #6
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This is the simple reason all forum members seeking better performance should install new plugs every (give or take) 10,000 miles, instead of every 50,000 to 100,000 miles.


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Nitrous is a little trickier than boost, but it's not the spray that kills motors, it's STUPIDITY!!
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Old 02-08-2012, 06:19 PM   #7
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If your running juice or F/I. I'd check my plugs/replace them every 3k with the oil.
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Old 02-08-2012, 09:02 PM   #8
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Agreed.
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Nitrous is a little trickier than boost, but it's not the spray that kills motors, it's STUPIDITY!!
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Old 02-08-2012, 09:24 PM   #9
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If your running juice or F/I. I'd check my plugs/replace them every 3k with the oil.
What would be the longest acceptable interval for FI ... As a daily, 3k interval is just too short.
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Old 02-08-2012, 09:36 PM   #10
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What would be the longest acceptable interval for FI ... As a daily, 3k interval is just too short.
Maybe you should look else where. Before I was F/I, 3k oil changes on the dot. As a daily, the hood should be opened daily. If you want to drive a car change the oil every 5k, 10k, 15k miles. You have the wrong car. 3k is pushing it for me, budget 1k in oil a year. I do mine around 2500.. religiously. I do all my own work, stock up on oil when it's for sale.

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Old 02-08-2012, 09:39 PM   #11
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Agreed..........again. I can't seem to get a word in. lol

EDIT: Except for the "budget 1k in oil a year", I just strain my oil through a Coffee Filter.
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Quote:
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Nitrous is a little trickier than boost, but it's not the spray that kills motors, it's STUPIDITY!!

Last edited by Rob43; 02-08-2012 at 09:42 PM.
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Old 02-08-2012, 09:46 PM   #12
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Agreed..........again. I can't seem to get a word in. lol

EDIT: Except for the "budget 1k in oil a year", I just strain my oil through a Coffee Filter.
We all know that only works for diesel fuel!!!!
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Old 02-09-2012, 02:10 AM   #13
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Maybe you should look else where. Before I was F/I, 3k oil changes on the dot. As a daily, the hood should be opened daily. If you want to drive a car change the oil every 5k, 10k, 15k miles. You have the wrong car. 3k is pushing it for me, budget 1k in oil a year. I do mine around 2500.. religiously. I do all my own work, stock up on oil when it's for sale.
Nope i definitely got the right car ... Maybe I ask the wrong person You need to get down your high horse! ... Having a 5k -7.5k OCI for NA car is perfectly acceptable lol

While your oil change interval could be plausible it's the plugs that I would think it's too short for a FI daily ...

According to some HPF stg 2 owners HPF recommends every 5k for oil and 10k for the plugs ... your 3k interval seems to be overkill.
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Old 02-09-2012, 07:16 AM   #14
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I change mine every 6000 miles (every 10,000 km) This interval is perfectly fine in a natural aspirated daily. I agree with having the hood open constantly to keep an eye on things before problems develop. I have had my oil analysed after 6000 miles and it was perfect. Any more with synthetic oil in a n/a motor is overkill. (perfectly acceptable, but overkill)
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Old 02-09-2012, 07:52 AM   #15
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I've been on the NGK BKR6EQUP for 40k miles now, and she runs great.

I do need to change them out soon. I learned on my last car (with a great deal of laptop scanning) that a colder plug could be benneficial in keeping 'knock retard' (as GM called it) away. I may have to try a step colder plug.
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Old 02-09-2012, 07:59 AM   #16
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I've been on the NGK BKR6EQUP for 40k miles now, and she runs great.

I do need to change them out soon. I learned on my last car (with a great deal of laptop scanning) that a colder plug could be benneficial in keeping 'knock retard' (as GM called it) away. I may have to try a step colder plug.

So after about 5 minutes of searching, here is the OEM NGK plug and some info:
http://www.ngk.com/results_cross.asp?pid=bkr6equp

Here is a plug that is a single heat range colder:
http://www.ngk.com/results_cross.asp?pid=bkr7equp

Some info on heat ranges:
http://www.ngk.com/charglossary.asp?kw=Heat+range
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Old 02-09-2012, 08:27 AM   #17
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I can't do oil changes that far apart. I beat the sh!t outta my car, driving habits should be included in this information. I check my plugs every oil change, why not? If a few look bad, I'll drop a new one in. Why not??

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Old 02-09-2012, 09:34 AM   #18
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Absolutely, why not check them. It's important to keep an eye on things. I just havn't found personally that I need to do oil that often. I drive spiritedly and certainly don't baby the throttle. I hit redline at least once every drive and frequenly down shift into 5 grand + rpms. But at the same time I wouldn't say I flog on the car except at the track and I definitely change oil before going if the oil is over 3000 miles.

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Old 02-09-2012, 12:29 PM   #19
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Originally Posted by xixixi View Post
Maybe you should look else where. Before I was F/I, 3k oil changes on the dot. As a daily, the hood should be opened daily. If you want to drive a car change the oil every 5k, 10k, 15k miles. You have the wrong car. 3k is pushing it for me, budget 1k in oil a year. I do mine around 2500.. religiously. I do all my own work, stock up on oil when it's for sale.
Dumbest poster award goes to..

Seriously based on empirical data from BITOG synth is easily good for 7.5k if not more for daily driving.


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Old 02-09-2012, 12:31 PM   #20
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Dumbest poster award goes to..

Seriously based on empirical data from BITOG synth is easily good for 7.5k if not more for daily driving.


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