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E90/E91/E92/E93 (2006 - 2013)
The E9X is the 4th evolution of the BMW 3 series including a highly tuned twin turbo 335i variant pushing out 300hp and 300 ft. lbs. of torque. BMW continues to show that it sets the bar for true driving performance! -- View the E9X Wiki

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  #1  
Old 10-24-2013, 09:53 PM
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WhiteFury WhiteFury is offline
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JB Stage 1 N55 Installed. Stage 2 upgrade, is it worth it?

I just purchased a JB stage 1 n55. The guy that sold me the stage 1 helped me install it, on the back of the actual device that goes into the ECU box he plugged in a USB to pin type cable and with his laptop he programed some settings.

He had the setting called "boost over stock from 0-10 psi" set to 5psi. He said it was like that on his vehicle as well.

My question is if I upgrade to stage 2 will I feel like I am losing power? The reason I am asking is because stage 2 lists Map #1 as being 12.5psi. The factory peak is 11psi, so essentially its only about 1.5psi over stock.

Map #2 is listed as 14psi which is listed as being for down pipe recommended.

I was already informed that When i place my order for the stage 2 upgrade I will have to request before wires as I don't think this has the CAN cables. I am prepared to add the wires which looks fairly easy.

Is it safe to run +5psi over stock? This tune is fast as crap! Its literally scary compared to stock.

I know many people rave about stage 2 however since I am running this map I dont want it to let me down.

Any thoughts?


EDIT: I run 93 octane 100% of the time. From sunoco, or shell V power. Sometimes Exxon or BP.
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  #2  
Old 10-24-2013, 10:47 PM
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bear-avhistory bear-avhistory is offline
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IIRC Terry's S-I recommendation is 3.5 over stock. The only way to tell where you are at is to create some logs with a few WOT pulls. Otherwise its just a WAG & not a good plan with a boosted engine. 2nd gear from 3000rpm through a shift into 4th works well. I don't think you want S-II unless you add more hardware, DP's etc. & better gas.

Its not all about how much boost you can force into the engine. Push to much boost with inadequate fuel or hardware to support it & the system pulls timing killing your power. Its always a balancing act with boost, fuel & ignition timing working in harmony not against each other.

BTW something to remember a DCI is not an improved engine.
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2014 BMW 435M-Sport
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2009 Ford Expedition 4X4 EL - 2009 V-Star
2003 Nissan Xterra 4X4 - 1998 Ford Ranger 4X4 Splash
FFR Cobra Mk-IV work in progress

Last edited by bear-avhistory; 10-24-2013 at 11:03 PM.
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  #3  
Old 10-24-2013, 10:59 PM
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WhiteFury WhiteFury is offline
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Ok. So the only benefit to stage 2 is the switching on the fly or for meth? There is a Map 5 that sounds good "Auto Tuning" which alot of people seem to love. I also like to be able to throw it into bypass for stock settings. The only disadvantage for me is simply losing 2.5psi. Map 2 on Stage 2 is basically only 2psi above stock.

I just like the extra power for once in a while. I wont drag race the car or track race. Its mainly a reliable DD. thats it. Just wanted some pep added. More show for me on this car.
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  #4  
Old 10-24-2013, 11:10 PM
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No stage two is a stronger tune but it requires what it requires to be effective. If you do not want to install downpipes FMIC + anything else stay with stage 1. As I said above boost is a funny thing & you can lose power with two much. You really need to set the car at default 3.5psi. Run a log send it to Terry & ask him if you can handle more boost & go from there.

Does not matter if you race or just DD. When you go to WOT the engine makes some serious demands on the system so the boost, fuel & timing have to be correct. You cannot set for excess boost just because you might only hit it once in a while. Every pull has to stand on its own or you can have a problem. The JB4 is pretty good in that if it senses trouble it will shut itself down, but you don't want to count on that alone
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2014 BMW 435M-Sport
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2009 Ford Expedition 4X4 EL - 2009 V-Star
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FFR Cobra Mk-IV work in progress

Last edited by bear-avhistory; 10-24-2013 at 11:16 PM.
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  #5  
Old 10-24-2013, 11:17 PM
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WhiteFury WhiteFury is offline
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Quote:
Originally Posted by bear-avhistory View Post
No stage two is a stronger tune but it requires what it requires to be effective. If you do not want to install downpipes FMIC + anything else stay with stage 1. As I said above boost is a funny thing & you can lose power with two much. You really need to set the car at default 3.5psi. Run a log send it to Terry & ask him if you can handle more boost & go from there.

Does not matter if you race or just DD. When you go to WOT the engine makes some serious demands on the system so the boost, fuel & timing have to be correct. You cannot set for excess boost just because you might only hit it once in a while. Every pull has to stand on its own or you can have a problem. The JB4 is pretty good in that if it senses trouble it will shut itself down, but you don't want to count on that alone

Oh ok. I dont have the USB cable yet. From the description it said that Map 1 was for stock cars, and Map 2 was for FMIC and Downpipes.

Even with that being said overall the Stage 2 map 1 is still a stronger and better map than what I have now?
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  #6  
Old 10-24-2013, 11:38 PM
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Without the cable you have no idea where you are. I would suggest you get one before you do anything else. Here is what I was talking about boost & timing. This guy had too much boost in the 4000/5000 rpm area. His log shows where I boxed it in red a big timing reduction due to excess boost = no power



Trying to remember the base boost for a stock N55, I think its around 9psi, so map 1 would be a wash.

Just thought maybe you have not seen these. I added the green box to show you the boost going up while the timing was going down. The boost line is only moving up 1psi or so, but the timing is falling way off. The timing is coming back up at the far right of the graph but you can also see the boost fell by about a pound. Its a very touchy thing & you cannot do it by "that seems good". Get the cable you will be happy you did.
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2014 BMW 435M-Sport
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2009 Ford Expedition 4X4 EL - 2009 V-Star
2003 Nissan Xterra 4X4 - 1998 Ford Ranger 4X4 Splash
FFR Cobra Mk-IV work in progress

Last edited by bear-avhistory; 10-24-2013 at 11:50 PM.
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  #7  
Old 10-25-2013, 12:20 AM
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WhiteFury WhiteFury is offline
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I guess I made a mistake as I thought that the N55 was 11psi. I am new to the bmws so I guess Map 1 on stage 2 is actually 3.5 psi above stock which is basically the same thing as stage 1. I do like all the extra controls tho LOL.
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  #8  
Old 10-25-2013, 05:41 AM
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bear-avhistory bear-avhistory is offline
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Not positive about the stock N55 boost, have it listed someplace in my stuff, if it turns up I will post it. New people to tunes tend to want to see big numbers in the boost column, nothing new about that. Back in the day everybody wanted to stuff Holly 850 double pumpers & long duration, 300 degree cams, on small block Chevy's
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2014 BMW 435M-Sport
2013 BMW 135is 6MT conv JB4/ISO
2009 Ford Expedition 4X4 EL - 2009 V-Star
2003 Nissan Xterra 4X4 - 1998 Ford Ranger 4X4 Splash
FFR Cobra Mk-IV work in progress

Last edited by bear-avhistory; 10-25-2013 at 05:45 AM.
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  #9  
Old 10-25-2013, 12:46 PM
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WhiteFury WhiteFury is offline
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Location: NJ
 
Join Date: Sep 2013
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Mein Auto: 2011 335i N55
JB Stage 1 N55 Installed. Stage 2 upgrade, is it worth it?

Quote:
Originally Posted by bear-avhistory View Post
Not positive about the stock N55 boost, have it listed someplace in my stuff, if it turns up I will post it. New people to tunes tend to want to see big numbers in the boost column, nothing new about that. Back in the day everybody wanted to stuff Holly 850 double pumpers & long duration, 300 degree cams, on small block Chevy's
Lol haha. I agree. I have a Shelby and its running 9 psi. The ignition and cam phasing is where the power is at.


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  #10  
Old 10-25-2013, 08:02 PM
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WhiteFury WhiteFury is offline
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Last couple of days I have noticed that there is a intermittent rattle under the car at idle. like an exhaust rattle. Its like "rattle....raaaatle........" lies its phasing in and out. Anyone every had this? It sounds like crap when I take off in first gear and press the throttle down it seems around 1500rpms it makes rattle and I can hear it bouncing off other cars or buildings. It does it around 1500 rpms in any gear with heavy load like 3rd gear at 1500 rpms and then pressing the throttle down to spool up the turbo. Also today I am almost certain I had a knock in 2nd gear around 3500 rpms. Its the dreaded popcorn sound.
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  #11  
Old 10-25-2013, 09:25 PM
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2014 435M-Sport Coupe
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Its wastegate rattle some cars get it some don't. Post here for help

http://www.n54tech.com/forums/forumdisplay.php?f=35
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Kevin

2014 BMW 435M-Sport
2013 BMW 135is 6MT conv JB4/ISO
2009 Ford Expedition 4X4 EL - 2009 V-Star
2003 Nissan Xterra 4X4 - 1998 Ford Ranger 4X4 Splash
FFR Cobra Mk-IV work in progress
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  #12  
Old 10-25-2013, 11:01 PM
Miller335 Miller335 is offline
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Prob exhaust flapper thingy.
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