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      02-18-2013, 12:03 PM   #1453
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Quote:
Originally Posted by AZ_1Zeries View Post
What would cause Charge Air Temp to climb excessively under WOT? I just had my car dyno'd at a shop and also had them do a log on my AP. Charge Temp rose to 170F and I had corrections in all Cylinders. Will post a graph shortly
how much boost are you running?
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      02-18-2013, 12:58 PM   #1454
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Quote:
Originally Posted by AZ_1Zeries View Post
What would cause Charge Air Temp to climb excessively under WOT? I just had my car dyno'd at a shop and also had them do a log on my AP. Charge Temp rose to 170F and I had corrections in all Cylinders. Will post a graph shortly

insufficient air flow through the IC.

Out side the limits of the turbo. When you go outside the chart you loose efficiencies and cause it to output more heat then normal. But as said above how much boost are you running?

restrictive hot and cold pipes are normally a last resort.
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      02-18-2013, 03:20 PM   #1455
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Quote:
Originally Posted by 135Pats View Post
The same parameters you always want to be looking over in a datalog, timing, AFRs, timing corrections, WGDC, fuel trims, boost req vs actual boost, boost taper as you approach redline. That'll cover the basics and should point you in the direction of whatever problems you may be having.
Thanks! How do I know what the proper values are though?
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      02-18-2013, 03:34 PM   #1456
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Originally Posted by syenisch View Post
Thanks! How do I know what the proper values are though?
That'll get you started

http://www.1addicts.com/forums/showt...ht=datalogging
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      02-18-2013, 04:11 PM   #1457
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Quote:
Originally Posted by RimasRS View Post
how much boost are you running?
My boost peaks at 18psi at 4300-4500rpm and tapers down to 12psi at 7k. I know 18 psi is about the limit for our tiny turbos.. Called the shop inquired about their air flow rating and the fan simulates up to 80mph airflow. The car went up to 132mph in 4th gear.

The second factor in all this is I was running ACN91 vs recommended 93. Works fine for my normal shenanigans on the street but, on a balls out dyno run may not be cutting it. So, will ahead and mix a little race gas to get my octane up and also up E85% for next dyno run.
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      02-18-2013, 04:13 PM   #1458
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Quote:
Originally Posted by euro2fast4u View Post
insufficient air flow through the IC.

Out side the limits of the turbo. When you go outside the chart you loose efficiencies and cause it to output more heat then normal. But as said above how much boost are you running?

restrictive hot and cold pipes are normally a last resort.
18psi peak ~4300rpm taper 12psi redline.
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      02-18-2013, 04:56 PM   #1459
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I dont think 91 vs 93 with a 30% e85 blend is the problem. I would be more concerned with the actual ethanol % of the e85 over your 91 vs 93 octane.
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      02-23-2013, 02:54 PM   #1460
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How does my giraffe look here? Timing corrections in cyls 2+3 in low rpm high load doesnt bother me. I could feel the boost jumping around a little bit not awful.

Thoughts?
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      02-28-2013, 04:49 AM   #1461
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Guys can somebody help me?
1. How to correctly log I did a run today. So when I hit the accel then I pressed button to start log when my rpm's hit 6500 I pressed the button again to stop logging but when I connected app to pc I see in log file just from 750-950 rpm. What I did wrong?
2. When I try to measure my 0-60 time it always shows at the end 0-60 time "-" and everywhere where has to be numbers I see just this sign --> "-"
The only time when it works if I am going slow to 60 mph. WTF?
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      02-28-2013, 06:17 AM   #1462
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Quote:
Originally Posted by b1aze View Post
How does my giraffe look here? Timing corrections in cyls 2+3 in low rpm high load doesnt bother me. I could feel the boost jumping around a little bit not awful.

Thoughts?
Your boost looks really choppy also it looks like your cars pulling a little bit of timing as the RPM's ramp up. If your engine is happy your timing curve should look perfectly like steps as it ramps up, but for some reason your curve seems to dip a little before each ramp up step. Maybe Plugs or coils?

Quote:
Originally Posted by RimasRS View Post
Guys can somebody help me?
1. How to correctly log I did a run today. So when I hit the accel then I pressed button to start log when my rpm's hit 6500 I pressed the button again to stop logging but when I connected app to pc I see in log file just from 750-950 rpm. What I did wrong?
2. When I try to measure my 0-60 time it always shows at the end 0-60 time "-" and everywhere where has to be numbers I see just this sign --> "-"
The only time when it works if I am going slow to 60 mph. WTF?
Hit the log button before going WOT then shift into the next gear before stopping the log. Those of us that have seen logs would be able to determine when you started and stopped.

Also make sure you're running the latest firmware.
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      02-28-2013, 06:30 AM   #1463
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Quote:
Originally Posted by RimasRS View Post
Guys can somebody help me?
1. How to correctly log I did a run today. So when I hit the accel then I pressed button to start log when my rpm's hit 6500 I pressed the button again to stop logging but when I connected app to pc I see in log file just from 750-950 rpm. What I did wrong?
2. When I try to measure my 0-60 time it always shows at the end 0-60 time "-" and everywhere where has to be numbers I see just this sign --> "-"
The only time when it works if I am going slow to 60 mph. WTF?
I found the instructions quite confusing myself. When i start a log, i will go to the log option, the warning screen comes up and asks you to press OK. I assumed that after that screen, it would start logging. It doesnt. You have to then go into one of the parameters, doesnt matter which, on the next screen and press the OK button again. It will say "not logging" before you press OK and then "initializing" then "logging" after. This will start a new log file. Press OK again to finish the log.

Quote:
Originally Posted by ErvGotti View Post
Your boost looks really choppy also it looks like your cars pulling a little bit of timing as the RPM's ramp up. If your engine is happy your timing curve should look perfectly like steps as it ramps up, but for some reason your curve seems to dip a little before each ramp up step. Maybe Plugs or coils?
Honestly, it feels a little choppy. I have plugs coming before the weekend. I dont get any misfire codes however. Ill change plugs out, as its past due (37k miles) and take another log. I also felt the boost curve looked a little non-smooth. Thanks
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      02-28-2013, 07:02 AM   #1464
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[QUOTE=b1aze;13557500]I found the instructions quite confusing myself. When i start a log, i will go to the log option, the warning screen comes up and asks you to press OK. I assumed that after that screen, it would start logging. It doesnt. You have to then go into one of the parameters, doesnt matter which, on the next screen and press the OK button again. It will say "not logging" before you press OK and then "initializing" then "logging" after. This will start a new log file. Press OK again to finish the log.


Thank you sir really was trying few times with no luck thanks again
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      02-28-2013, 10:15 PM   #1465
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I see Cobb stage 2 maps are out.
But I can't find any stage 2 dyno curves on their site for the n55.
I am running stage 1 aggressive + FMIC, and really enjoying the tune.
I will now be installing stage 2 next week after I install the DP, and I guess a dyno run is in my future.
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      03-01-2013, 08:22 AM   #1466
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I'm interested to see how, if at all, the mapping changes on the N55. On N54s at least, Stg1+ is stronger and more aggressive than "normal" Stg2. I really liked the Stg1+ maps a lot, they're quite punchy.
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      03-01-2013, 08:45 AM   #1467
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Quote:
Originally Posted by 135Pats View Post
I'm interested to see how, if at all, the mapping changes on the N55. On N54s at least, Stg1+ is stronger and more aggressive than "normal" Stg2. I really liked the Stg1+ maps a lot, they're quite punchy.
Almost a bit too much IMO. I feel like power comes on a bit strong at light throttle for my taste on Stg1+FMIC Aggressive LT. I may switch to the non-aggressive map for Stg1+fmic and see how it feels, but i do love the WOT power that comes with the aggressive.
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      03-01-2013, 08:49 AM   #1468
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Almost a bit too much IMO. I feel like power comes on a bit strong at light throttle for my taste on Stg1+FMIC Aggressive LT. I may switch to the non-aggressive map for Stg1+fmic and see how it feels, but i do love the WOT power that comes with the aggressive.
The linear throttle mapping never did it for me, but that’s because this is my first FI car and I still love the feeling of getting on boost. But yea, Stg1+ maps are legit; I never understood why Cobb users who weren’t going FBO went with downpipes before intercoolers. You’re using weaker maps+the hassle of being catless+heatsoak for days.
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      03-01-2013, 09:13 PM   #1469
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Why does the Cobb website list stage 1 gains for the 135i at 21% while all other N54 cars are at 30%?
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      03-01-2013, 09:16 PM   #1470
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Why does the Cobb website list stage 1 gains for the 135i at 21% while all other N54 cars are at 30%?
I have heard it is due to our turbobacks being restrictive.
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      03-01-2013, 09:19 PM   #1471
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I have heard it is due to our turbobacks being restrictive.
Unfortunately true. The 135 has a particularly restrictive exhaust compared to the 3/5 series.

-Josh
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      03-01-2013, 09:35 PM   #1472
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Originally Posted by Venom View Post
I have heard it is due to our turbobacks being restrictive.
Unfortunately true. The 135 has a particularly restrictive exhaust compared to the 3/5 series.

-Josh
What is the bottleneck? Cats? Or is it something we can easily free up with mids or axle back without dealing with catless DPs?
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      03-01-2013, 09:38 PM   #1473
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What is the bottleneck? Cats? Or is it something we can easily free up with mids or axle back without dealing with catless DPs?
It should be the axleback, I say this because the most of the exhaust is nearly the same (DPs are the same, mid pipes are nearly the same)
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      03-01-2013, 09:43 PM   #1474
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It should be the axleback, I say this because the most of the exhaust is nearly the same (DPs are the same, mid pipes are nearly the same)
^Correct. The good thing about BMW is that they re-use well designed parts whenever possible... unfortunately the 1 series is different enough to warrant some o f their own exhaust parts. A quality cat-back will free up the exhaust to provide similar results to anything the 3/5 series sees.

-Josh
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