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      06-20-2016, 11:55 AM   #1
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Exclamation 335i: Knock on multiple cylinders? Log insight

Hello guys, what's wrong with these timing corrections?
Spaark plugs and coils new.
Cleaned all injectors and replaced the cyl 2 injector.
Is a 2nd gear pull, cobb aggressive stage 2 + fmic.
Should I replace the other injectors?

http://datazap.me/u/gigitomma89/log-...-9-10-11-12-21
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      06-20-2016, 12:09 PM   #2
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injectors won't help. too much boost/too high iat/too much timing. could be any of those. you need to log iat and actual timing.
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      06-20-2016, 12:10 PM   #3
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How many miles on the car and did you use a JB4 previously ? It could be Transmission related timing corrections base on what is only being provided in the logs.

Last edited by BQTuning; 06-20-2016 at 12:18 PM..
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      06-20-2016, 04:21 PM   #4
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Will do another log tomorrow. 60k Miles in the car.
From what you understand it could be transmission related?
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      06-21-2016, 11:41 PM   #5
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Not enough octane.
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      06-22-2016, 08:41 AM   #6
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Quote:
Originally Posted by Gigitomma89
Hello guys, what's wrong with these timing corrections?
Spaark plugs and coils new.
Cleaned all injectors and replaced the cyl 2 injector.
Is a 2nd gear pull, cobb aggressive stage 2 + fmic.
Should I replace the other injectors?

http://datazap.me/u/gigitomma89/log-...-9-10-11-12-21
Have you tried a lower octane map with less timing and boost? Sometimes it pays to be less aggressive to go faster, counterintuitive though it may seem.
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      06-23-2016, 03:37 AM   #7
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Quote:
Originally Posted by jwebb335xi View Post
Have you tried a lower octane map with less timing and boost? Sometimes it pays to be less aggressive to go faster, counterintuitive though it may seem.
Hey! To answer to you and the other kind people who entered the thread, I must say that I always use 100 octane gas. Since I am tuned I never put insite the car less than 100 octane gas. Sometime it represents a problem because here in italy the aren't 100 octane gas satation everywhere. ( But still much better than in Usa I think).
Maybe is my hardware (lpfp pump or others) than can't provide the amount of gas demanded?
I tried going sport instead of aggressive and surely the gar gose smoother, but I lose 0,2-0,3 seconds in the 0-60 mph.
Moreover with good tires ( bridgestone potenza almost new) which is a good time 0-60 for a convertible fbo (but without meth and inlets)?
I know that is more predictive the 1/4 mile time but here we use to look at the 0-60.
This was my best time runnin' aggressive map: without launch control, starting from first gear, half tank of gas, just me on board.

Thanks everyone, your comments were highly appreciated
Luigi

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      06-23-2016, 08:23 AM   #8
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Quote:
Originally Posted by Gigitomma89
Quote:
Originally Posted by jwebb335xi View Post
Have you tried a lower octane map with less timing and boost? Sometimes it pays to be less aggressive to go faster, counterintuitive though it may seem.
Hey! To answer to you and the other kind people who entered the thread, I must say that I always use 100 octane gas. Since I am tuned I never put insite the car less than 100 octane gas. Sometime it represents a problem because here in italy the aren't 100 octane gas satation everywhere. ( But still much better than in Usa I think).
Maybe is my hardware (lpfp pump or others) than can't provide the amount of gas demanded?
I tried going sport instead of aggressive and surely the gar gose smoother, but I lose 0,2-0,3 seconds in the 0-60 mph.
Moreover with good tires ( bridgestone potenza almost new) which is a good time 0-60 for a convertible fbo (but without meth and inlets)?
I know that is more predictive the 1/4 mile time but here we use to look at the 0-60.
This was my best time runnin' aggressive map: without launch control, starting from first gear, half tank of gas, just me on board.

Thanks everyone, your comments were highly appreciated
Luigi

You mentioned the car is smoother on sport maps, perhaps logging a sport map would help to eliminate too aggressive of a tune for your car.

For what it's worth, I had timing and boost dialed back slightly on my tune due to poor fuel. My last three logs show ZERO timing corrections and load still pushes past 180.
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      06-23-2016, 01:40 PM   #9
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Hey guys, as promised I took two new logs with cyl timing and intake air temp. The temp seems to be near 130 F.
In both logs the correction are 0 during all the pulling. The problem was that today the 0-60 was about 4,9. Outside temp was about 93 F.
The link are here:

http://datazap.me/u/gigitomma89/log-...13-14-15-16-21

http://datazap.me/u/gigitomma89/log-...-22&zoom=1-195

These are two screenshots showing charge air temp and timing
What do you think about?


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      06-24-2016, 09:08 AM   #10
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Quote:
Originally Posted by Gigitomma89
Hey guys, as promised I took two new logs with cyl timing and intake air temp. The temp seems to be near 130 F.
In both logs the correction are 0 during all the pulling. The problem was that today the 0-60 was about 4,9. Outside temp was about 93 F.
The link are here:

http://datazap.me/u/gigitomma89/log-...13-14-15-16-21

http://datazap.me/u/gigitomma89/log-...-22&zoom=1-195

These are two screenshots showing charge air temp and timing
What do you think about?


My understanding is that when AIT hits 109 or so, the DME reduces timing a bit so you don't have problems. 0-60 in 4.9 sec seems pretty good to me for a 93*f kinda day.

Perhaps others have more to offer, but it seems if you want to retain massive power I. That heat a new FMIC and/or meth may be they way to go. Given timing is not correcting, I think I'd be happy with what you're seeing unless the car feels wrong somehow..
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      06-24-2016, 12:16 PM   #11
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Quote:
Originally Posted by jwebb335xi View Post
My understanding is that when AIT hits 109 or so, the DME reduces timing a bit so you don't have problems. 0-60 in 4.9 sec seems pretty good to me for a 93*f kinda day.

Perhaps others have more to offer, but it seems if you want to retain massive power I. That heat a new FMIC and/or meth may be they way to go. Given timing is not correcting, I think I'd be happy with what you're seeing unless the car feels wrong somehow..
Thanks for your reply. The fmic is the 7" vrsf. It was installed new in Genuary..
I hope it's not on the way to fail..
I installed also the ecs carbon fiber cai. Payed such a f*** mass of money (800€) and it seems it's not doing the job..
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      06-24-2016, 12:21 PM   #12
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The DME doesn't start pulling timing until 130*F. Which could be as soon as you hit 4th gear from a cooled down standstill at WOT... The next WOT run, it may start pulling in 3rd, etc etc... Any of the offered intercooler upgrades will prevent this. 5" is all you need for street use. If you are road racing/auto crossing, then a larger unit would be beneficial on those hot laps on hot days.
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      06-24-2016, 12:26 PM   #13
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Quote:
Originally Posted by Cory S View Post
The DME doesn't start pulling timing until 130*F. Which could be as soon as you hit 4th gear from a cooled down standstill at WOT... The next WOT run, it may start pulling in 3rd, etc etc... Any of the offered intercooler upgrades will prevent this. 5" is all you need for street use. If you are road racing/auto crossing, then a larger unit would be beneficial on those hot laps on hot days.
But I have the vrsf fmic. It is 7". Do you think I have to replace it?
Thanks
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      06-24-2016, 12:28 PM   #14
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Like I said, just too much boost/timing for the conditions/iat. Looks normal for living in a warm climate. Meth might be the only way to help. The vrsf 7'' is more than enough for stock turbos, espcially only running 20psi or less.

Not sure why buraq thought it may be transmission related..
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      06-24-2016, 12:29 PM   #15
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Quote:
Originally Posted by Gigitomma89 View Post
But I have the vrsf fmic. It is 7". Do you think I have to replace it?
Thanks
By all means NO!!
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      06-24-2016, 12:29 PM   #16
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Quote:
Originally Posted by Heel Toe View Post
Like I said, just too much boost/timing for the conditions/iat. Looks normal for living in a warm climate. Meth might be the only way to help. The vrsf 7'' is more than enough for stock turbos.
Ok thanks buddy.
That day the outside temp was 93 F. Here in Italy now it's starting to be very hot..
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      06-24-2016, 12:31 PM   #17
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So no way to go down to 4.3-4.4 in 0-60 without meth and with stock turbos...
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      06-24-2016, 12:47 PM   #18
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Quote:
Originally Posted by Gigitomma89
So no way to go down to 4.3-4.4 in 0-60 without meth and with stock turbos...
Honestly, my best suggestion would be to stop worrying about 0-60 times. They're utterly useless.
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      06-24-2016, 01:02 PM   #19
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Quote:
Originally Posted by Heel Toe View Post
Honestly, my best suggestion would be to stop worrying about 0-60 times. They're utterly useless.
Ahaha you'definetly right I kno. But the problem is that here in Italy we have just road space for 0-60... It's an ancient country, roads were been made for horses
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      06-24-2016, 05:41 PM   #20
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Quote:
Originally Posted by Gigitomma89 View Post
So no way to go down to 4.3-4.4 in 0-60 without meth and with stock turbos...
Nitrous?!
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      06-25-2016, 01:09 AM   #21
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Quote:
Originally Posted by Jeff@TopGearSolutions View Post
Nitrous?!
Ahaha I will race my buddy 8V S3 soon. And will let ya know the results.
He claims 4.9 in 0-60.
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