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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 question.



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      04-11-2011, 03:09 PM   #23
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So map 5 is safe to run?
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      04-11-2011, 03:11 PM   #24
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Originally Posted by Tungtr09 View Post
So map 5 is safe to run?
For the most part yes but the best thing to always do is log a few runs and send the logs to Terry and he will tell you how you are looking and what you can get away with.
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      04-11-2011, 03:19 PM   #25
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Quote:
Originally Posted by rmdvrs View Post
Quote:
Originally Posted by Tungtr09 View Post
So map 5 is safe to run?
For the most part yes but the best thing to always do is log a few runs and send the logs to Terry and he will tell you how you are looking and what you can get away with.
K thanks
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      04-11-2011, 03:21 PM   #26
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Map 5 may leave a bit of power on the table.

run Map 5 and then log it

run Map 2 and then log it

see which one makes more safe power.....
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      04-11-2011, 03:24 PM   #27
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Originally Posted by ccbad View Post
I've had the JB3/JB4 for almost 2 years on my car and loved every minute of it. Had no engine problems what so ever and my car is my daily driver. However, I was only running the lower maps (map 5 on JB3 and map 1 on JB4) since I only have dci and exhaust.
i almost have same set up, dci and exhaust.
how about map5(jb4)???
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      04-11-2011, 06:59 PM   #28
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I run map 5 with DCI, DP and aftermarket charge pipe. I've had no issues and the car pulls hard.
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      04-11-2011, 10:20 PM   #29
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Do I need a oil cooler?
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      04-12-2011, 10:14 AM   #30
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Litos,

How are you liking the COBB compared to the JB4?
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      04-12-2011, 10:37 AM   #31
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Quote:
Originally Posted by bigdaddycane View Post
Litos,

How are you liking the COBB compared to the JB4?
for the two days that i drove it, it feels slightly different during normal driving conditions.

the boost comes on a hair quicker as if it's a bit more sensitive to throttle, but it doesn't spike up like some others have reported.

under WOT the 2.5-3psi increase is definitely noticeable.

my wife drives the 335 because she doesn't wanna put $70 of gas into the SRT8 and only drive it 290 miles
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      04-12-2011, 10:39 AM   #32
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I may go to the COBB but only after they come out with Stage II and/or the APR is totally ironed out.
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      04-12-2011, 10:42 AM   #33
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Cobb is a great product no doubt.

i didn't need the Stage 2 tro make my decision, and even when they release it, i won't need it because i'm keeping my stock exhaust HAHA !!!!

the one thing that made me get the Cobb was the immaculate A/Fr's. 12.5's pretty much all the way across the board - i was stunned.
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      04-12-2011, 11:06 AM   #34
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Nice Carlos, when did you get the Cobb?
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      04-12-2011, 11:11 AM   #35
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Quote:
Originally Posted by Litos View Post
Map 5 may leave a bit of power on the table.

run Map 5 and then log it

run Map 2 and then log it

see which one makes more safe power.....
Good advice

Mike
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      04-12-2011, 11:52 AM   #36
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is it safe, if i change map, while driving???
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      04-12-2011, 12:15 PM   #37
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Quote:
was the immaculate A/Fr's. 12.5's pretty much all the way across the board
there's a lot to be said for that....
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      04-12-2011, 01:13 PM   #38
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Quote:
Originally Posted by bigdaddycane View Post
there's a lot to be said for that....
yeah, check out the A/F's at the bottom.




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      04-13-2011, 01:48 AM   #39
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Stupid question but is the a instruction guide to how to change modes and to turn the boosts gauge on?
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      04-13-2011, 02:07 AM   #40
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Quote:
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is it safe, if i change map, while driving???
You can do it, but it's probably not safe, you should be focused on the road Just do everyone a favor and pull over for 10 seconds.

Quote:
Originally Posted by Tungtr09 View Post
Stupid question but is the a instruction guide to how to change modes and to turn the boosts gauge on?
http://www.n54tech.com/forums/showthread.php?t=10605
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      04-13-2011, 11:23 AM   #41
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Quote:
Originally Posted by skinrock View Post
You can do it, but it's probably not safe, you should be focused on the road Just do everyone a favor and pull over for 10 seconds.



http://www.n54tech.com/forums/showthread.php?t=10605
+1 thx!
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      04-13-2011, 12:47 PM   #42
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So I turned to boosts gauge on and it only shows that I'm getting alittle under 10 psi most of the time. Shouldn't it be higher at high rpm?
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      04-13-2011, 12:57 PM   #43
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Quote:
Originally Posted by Tungtr09 View Post
So I turned to boosts gauge on and it only shows that I'm getting alittle under 10 psi most of the time. Shouldn't it be higher at high rpm?
Yes, unless you are on stock map (map 0). If you are on map on2 you should see close to 13 and 14.5 if you are on map 2. Its most likely a boost leak but we wont know unless you scan the car with the jb4 usb cable. I had an AA bov and charge pipe and i could never get it to seal all the way. I put my stock CP back on with stock DV's and my boost is back at target again. the only way to test is to put the original charge pipe back on.
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      04-13-2011, 01:07 PM   #44
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Quote:
Originally Posted by indy99gpgt View Post
Quote:
Originally Posted by Tungtr09 View Post
So I turned to boosts gauge on and it only shows that I'm getting alittle under 10 psi most of the time. Shouldn't it be higher at high rpm?
Yes, unless you are on stock map (map 0). If you are on map on2 you should see close to 13 and 14.5 if you are on map 2. Its most likely a boost leak but we wont know unless you scan the car with the jb4 usb cable. I had an AA bov and charge pipe and i could never get it to seal all the way. I put my stock CP back on with stock DV's and my boost is back at target again. the only way to test is to put the original charge pipe back on.
I'm on map 5 like everyone here tells me to do. Is there any other way to know besides putting the old charge pipe on? I kinda broke a piece of it when I installed my bov. And it the a way to fix? I kinda feel like it's leaking cause the spot that the charge pipe enters the engine is not that tight.
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