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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 > JB4 Map 2 on 91 octane....



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      02-09-2011, 02:11 PM   #1
Rotary Rasp
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JB4 Map 2 on 91 octane....

I've been driving around on map 5 (JB3) for the last 20k miles and the car has never missed a beat. Always felt strong expect for the once in a while when I would get sub-par gas. (it could be from any brand - not just cheap brands)

Even on bad gas, the car still drove fine. It just didn't have punch I'm use to and it was only noticeable under WOT in gears 2, 3, & 4.

My only mods are DCI and gutted secondary cats. After 30k miles /20k tuned, here are my plugs... (see below)

With the JB4, the car feels great on map 2. As smooth as butter and it seems to be even less particular of the gas. My question is, am I doing damage running map 2 on 91 octane?

p.s. - as a safety measure, I limited the global boost to 14psi.

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      02-09-2011, 02:23 PM   #2
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Go with Map1, you could be overall faster/smoother with it for your octane. Map2 is for 93octane and a FMIC or Dp's is what is suggested.
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      02-09-2011, 02:47 PM   #3
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Map 1 definitely not faster than map 2 in my car. The power difference is very noticeable...
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      02-09-2011, 03:39 PM   #4
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if you want to run map2 safely get a methkit with a failsafe.

More octane
Better timing
Lower AIT's
You could start messing around with map3

400whp with two mods is fun believe me lol.
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      02-09-2011, 04:13 PM   #5
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Quote:
Originally Posted by Rotary Rasp View Post
I've been driving around on map 5 (JB3) for the last 20k miles and the car has never missed a beat. Always felt strong expect for the once in a while when I would get sub-par gas. (it could be from any brand - not just cheap brands)

Even on bad gas, the car still drove fine. It just didn't have punch I'm use to and it was only noticeable under WOT in gears 2, 3, & 4.

My only mods are DCI and gutted secondary cats. After 30k miles /20k tuned, here are my plugs... (see below)

With the JB4, the car feels great on map 2. As smooth as butter and it seems to be even less particular of the gas. My question is, am I doing damage running map 2 on 91 octane?

p.s. - as a safety measure, I limited the global boost to 14psi.
Plugs look good! Nice happy motor there.

With the boost limit set to 14 you'll only target 13.5psi. If you are worried and don't want to read logs just run map 1 until the autotuning map 5 is ready for testing.

Mike
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      02-09-2011, 04:38 PM   #6
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Quote:
Originally Posted by Mike@N54Tuning.com View Post
run map 1 until the autotuning map 5 is ready for testing.

Mike
Hey Mike,

When will autotuning be available?
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      02-09-2011, 04:46 PM   #7
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Did you drop the plug on the left? one of the prongs looks bent. Looks like normal plug wear to me.
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      02-09-2011, 04:57 PM   #8
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not trying to thread jack but wanted to know if you only have the jb4 and dci is it ok to run map 2 with 100 octane or would it be best to keep it at map 1 with the 100 octane map 2 would only be used for the drag strip passes so i wouldn't be driving around town with map 2 on
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      02-09-2011, 04:59 PM   #9
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Quote:
Originally Posted by Tee212 View Post
Did you drop the plug on the left? one of the prongs looks bent. Looks like normal plug wear to me.
no, it's not bent. I think it's just a shadow in that picture.
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      02-09-2011, 05:05 PM   #10
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Quote:
Originally Posted by lightning20 View Post
not trying to thread jack but wanted to know if you only have the jb4 and dci is it ok to run map 2 with 100 octane or would it be best to keep it at map 1 with the 100 octane map 2 would only be used for the drag strip passes so i wouldn't be driving around town with map 2 on
You can definatly run map 2 with 100 octane and DCI only.
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      02-09-2011, 07:26 PM   #11
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1,2,and 4 dont look right. IDK if its the picture but the insulator and electrodes are touching or nearly touching. Color looks good, but???
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      02-09-2011, 07:53 PM   #12
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I'll take a better picture tonight. That one was taken with my shitty cell phone camera.
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      02-09-2011, 07:58 PM   #13
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Well she aint running too rich, that is for sure.

http://www.ngksparkplugs.com/tech_su...qs/faqread.asp

PLenty to learn right here.

Quote:
Being able to "read" a spark plug can be a valuable tuning aid. By examining the insulator firing nose color, an experienced engine tuner can determine a great deal about the engine's overall operating condition.

In general, a light tan/gray color tells you that the spark plug is operating at optimum temperature and that the engine is in good condition. Dark coloring, such as heavy black wet or dry deposits can indicate an overly-rich condition, too cold a heat range spark plug, a possible vacuum leak, low compression, overly retarded timing or too large a plug gap.

If the deposits are wet, it can be an indication of a breached head gasket, poor oil control from ring or valvetrain problems or an extremely rich condition - depending on the nature of the liquid present at the firing tip.

Signs of fouling or excessive heat must be traced quickly to prevent further deterioration of performance and possible engine damage.
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      02-09-2011, 10:24 PM   #14
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Quote:
Originally Posted by Rotary Rasp View Post
Map 1 definitely not faster than map 2 in my car. The power difference is very noticeable...
The intial agressiveness might really just mask how fast ur ar is really going. Do some logs, i an bet your car is really not liking it. If you have PID autotuning enabled, that might help some.
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      04-26-2012, 09:41 PM   #15
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Hey guys so what do y'all think about map 2 on 93 with afe scoops, 2nd cats deleted and muffler deleted?
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      04-26-2012, 10:26 PM   #16
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Quote:
Originally Posted by EASTCOASTNINJA View Post
Hey guys so what do y'all think about map 2 on 93 with afe scoops, 2nd cats deleted and muffler deleted?
Get Dps....I tried without Dps and my cats started smelling.
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      04-26-2012, 11:20 PM   #17
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Hahaha what do you mean ur dps started smelling? I mean when u change maps you're really just changing the boost leves correct? And you should be able to run more boost with the less restriction you have. The exhuast system is te most restrictive thing on the car, so deleting the 2nd cats and mufflers is really the same as deleting the 1st cats and that's it. Yes? What do y'all think?
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      04-26-2012, 11:53 PM   #18
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Quote:
Originally Posted by EASTCOASTNINJA View Post
Hahaha what do you mean ur dps started smelling? I mean when u change maps you're really just changing the boost leves correct? And you should be able to run more boost with the less restriction you have. The exhuast system is te most restrictive thing on the car, so deleting the 2nd cats and mufflers is really the same as deleting the 1st cats and that's it. Yes? What do y'all think?
Map 2 with factory pipes and my cats where smelling lol!
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      04-27-2012, 12:03 AM   #19
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What did they smell like? Waffels?
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      04-27-2012, 12:16 AM   #20
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Quote:
Originally Posted by EASTCOASTNINJA View Post
What did they smell like? Waffels?
Are you trolling? If not they smelled like rotten eggs....what else would they smell like? Lol!!
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      04-27-2012, 12:21 AM   #21
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Yea a lil lol I have 8 hours left of my 24hr shift so I'm loosing my Mind. Well i dont care if my care smells like douche water as long as it runs right. I did a few pulls in map 2 and it feels nice, I have to check it out some more to see if I notice something wrong or really different.
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      04-27-2012, 12:22 AM   #22
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Quote:
Originally Posted by EASTCOASTNINJA View Post
Yea a lil lol I have 8 hours left of my 24hr shift so I'm loosing my Mind. Well i dont care if my care smells like douche water as long as it runs right. I did a few pulls in map 2 and it feels nice, I have to check it out some more to see if I notice something wrong or really different.
Lol!!! It probably has something to o with a timing dip...log it
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