[lorddrinkalot]

Originally Posted by Lulz_M3

It could/should. I would fill up on 102 RON and log it, see if the multiple cylinder timing corrections go away.

How much does the ambiente temperature change the timing of the DME?

I mean there must be a differnce between 60°F and 95°F.
Is it possible that because of heat my timing corrections were so bad?

[Lulz_M3]

Originally Posted by lorddrinkalot

How much does the ambiente temperature change the timing of the DME?

I mean there must be a differnce between 60°F and 95°F.
Is it possible that because of heat my timing corrections were so bad?

I believe the threshold is 140 F. Not sure if it would show as a timing correction, or if the DME just changes its target. If the DME targets less timing, it would not show as a correction.

[benzy89]

Heatsoaked IC = Shit Performance + Limp Performance. Regardless if you're using the Stock IC or an aftermarket Core, a car running in 60-70°F is going to perform better than a car being run in 80-90°F

[BMWsky]

True, but a good aftermarket FMIC coupled with a true CAI will do a better job at avoiding heat soak. Case in point, last night I did a hard 3rd gear pull in 86 degree temps...my temp at the TB was 99 degrees. I did that pull after my car was warmed up and my oil temps were at 230.

[lorddrinkalot]

I don't think we have to argue about hot vs. cold air

But my question is if the corrections the DME performs due to "hot tempreatures" are showing up as Timing Corrections or as something else.

In my case when I did the Logfiles it was a pretty hot day. And it hasn't changed ever since.

Air Temp was about 30 to 35° C -> 86 to 95° F
Charge Air Temp after some pulls were 65° C -> 150° F

And I did pull 5th gear, not until Redline but about 6800RPM

I think my IC is working good, but still 150° F Charge Temp is hot air.

@BMWsky:
In 3rd gear at 6650RPM I also had 40°C -> 104° F

[BMWsky]

Originally Posted by lorddrinkalot

@BMWsky:
In 3rd gear at 6650RPM I also had 40°C -> 104° F

What other mods do you have? I ask because my temp at the manifold are typically 15 degrees above ambient regardless of which gear I pull in. I've been at the track and logged during some pretty hot sessions and found that my internal temps stay right there regardless. My car probably hasn't seen temps as high as yours since I added the FMIC and CAI. Even if the temps start creeping up, as soon as I shift they'll drop dramatically.

[AWD Addict]

Originally Posted by BMWsky

True, but a good aftermarket FMIC coupled with a true CAI will do a better job at avoiding heat soak. Case in point, last night I did a hard 3rd gear pull in 86 degree temps...my temp at the TB was 99 degrees. I did that pull after my car was warmed up and my oil temps were at 230.

CAI is a waste of money. By the time the intake charge is compressed and has soaked in the engine bay (the CAI get's hot), the difference in temp between a CAI and short pipe is negligable at the throttle body. When you consider the longer and more contorted run the air needs to travel in a CAI, you'll likely end up in a worse condition rather than better. This principle is exacerbated with higher boost, as with a harder working turbo comes much more heat, and higher PSI = more compression effect heat in the charge.

The focus on an FI car should be the least amount of restriction and direction change in the intake tract. If you want cooler charge temps, focus on improving the area that cools the charge (intercooler).

[BMWsky]

Originally Posted by AWD Addict

CAI is a waste of money. By the time the intake charge is compressed and has soaked in the engine bay (the CAI get's hot), the difference in temp between a CAI and short pipe is negligable at the throttle body. When you consider the more contorted run the air needs to travel in a CAI, you'll likely end up in a worse condition rather than better.

The focus on an FI car should be the least amount of restriction and direction change in the intake tract. If you want cooler charge temps, focus on improving the area that cools the charge (intercooler).

CAI is a waste of money???? Are you confusing DCI with CAI??? My Stett CAI doesn't pull in heatsoaked engine air.

[lorddrinkalot]

@BMWsky:
Only IC.
I haven't found the right Intake for me yet.

Yeah the temps are while driving normal always about 15-20°C above Air temp.
But If you pull 2nd until 6th gear the temps change dramatically.

[benzy89]

Originally Posted by lorddrinkalot

@BMWsky:
Only IC.
I haven't found the right Intake for me yet.

Know the feeling... I have the typical aFe DCI installed, but I'm looking at their "Elite" sealed intake w/ the snorkel feed

[Jake@MOTIV]

Originally Posted by Lulz_M3

I believe the threshold is 140 F. Not sure if it would show as a timing correction, or if the DME just changes its target. If the DME targets less timing, it would not show as a correction.

There are corrections for timing based on a few different temperatures. I don't have anything in front of me since I am at work but as temperature increases timing will scale back but will not show as a timing correction it will just adjust timing based on the scalar / new value being implemented from the table and cell when the conditions dictate. These are all things you can change so that they don't happen if you always want to run the same values (simply put 0 change in the appropriate table by making the scalar 0) .but something I would definitely keep as its better to run the right values the first time over letting the engine see KR.

[lorddrinkalot]

@benzy89:
I think that stuff is to expensive. Some plastic for 800$ + in my case Customs and tax here in Germany. Makes ~ 1200$. Thats not worth it.

+ Police doesn't like those mods very much. U can get in real trouble for something like this.

So I need a OEM look intake, that doesn't cost a furtune and is easy to change back to OEM. Seems like an easy task!

[Lulz_M3]

Originally Posted by FlyLow335i

There are corrections for timing based on a few different temperatures. I don't have anything in front of me since I am at work but as temperature increases timing will scale back but will not show as a timing correction it will just adjust timing based on the scalar / new value being implemented from the table and cell when the conditions dictate. These are all things you can change so that they don't happen if you always want to run the same values (simply put 0 change in the appropriate table by making the scalar 0) .but something I would definitely keep as its better to run the right values the first time over letting the engine see KR.

Love it. Really wish ATR would drop.

[Jake@MOTIV]

Originally Posted by Lulz_M3

Love it. Really wish ATR would drop.

It's well worth the wait

[lorddrinkalot]

Originally Posted by FlyLow335i

It's well worth the wait

What is ATR?

[Jake@MOTIV]

Originally Posted by lorddrinkalot

What is ATR?

Access tuner race. Software that lets us tune our cars.

[AWD Addict]

Originally Posted by BMWsky

CAI is a waste of money???? Are you confusing DCI with CAI??? My Stett CAI doesn't pull in heatsoaked engine air.

1) Yes.
2) No.

Your CAI becomes a longer, curvier, heatsoaked tunnel for your engine air to run through, negating much or all of the temperature difference from outside to inside the engine bay. It's harder for an engine to draw air through a longer tube than a shorter one, even if there are no additional bends. A T in the track is even worse.

The best intake solution for FI is a short, wide, straight pipe. If you could put a cone filter on the turbo inlet, that'd be best.

[benzy89]

Originally Posted by lorddrinkalot

@benzy89:
I think that stuff is to expensive. Some plastic for 800$ + in my case Customs and tax here in Germany. Makes ~ 1200$. Thats not worth it.

+ Police doesn't like those mods very much. U can get in real trouble for something like this.

So I need a OEM look intake, that doesn't cost a furtune and is easy to change back to OEM. Seems like an easy task!

Any non-OEM "sealed" intake is going to that price range and up. You basically have the aFe Elite ($650-$850 if you get the snorkels), BMW Performance CF Intake ($1,000) or the Gruppe M CF ($2,000+). I'm surprised that you're concerned about the Police in Germany with the amount of forum users that are on here running highly modded cars that are very very un-OEM.

Edit: BMW Performance Intake is no longer FS & the Gruppe M is closer to $2.5k. BuraQ has reviewed the aFe Elite in depth, he saw gains after slightly modifying it himself (sealed gaps to make it more "air tight"). If you're picky with materials used & aren't a fan of the aFe's construction, then the Dinan CAI ($1.3k) is probably your best bet.

[BMWsky]

Originally Posted by AWD Addict

1) Yes.
2) No.

Your CAI becomes a longer, curvier, heatsoaked tunnel for your engine air to run through, negating much or all of the temperature difference from outside to inside the engine bay. It's harder for an engine to draw air through a longer tube than a shorter one, even if there are no additional bends. A T in the track is even worse.

The best intake solution for FI is a short, wide, straight pipe. If you could put a cone filter on the turbo inlet, that'd be best.

Are you basing this on real world application or conjecture? I ask because my logs taken while on the track at Watkins Glen disagree with your conclusions. The air never sits long enough in the "longer tube" because the engine keeps sucking in the cold air from the lower part of the grill. Again, you seem pretty convinced by your posts; I'll go by what my real world experience has shown me and by the data that my logs provide.

[nitehawk]

Originally Posted by AWD Addict

1) Yes.
2) No.

Your CAI becomes a longer, curvier, heatsoaked tunnel for your engine air to run through, negating much or all of the temperature difference from outside to inside the engine bay. It's harder for an engine to draw air through a longer tube than a shorter one, even if there are no additional bends. A T in the track is even worse.

The best intake solution for FI is a short, wide, straight pipe. If you could put a cone filter on the turbo inlet, that'd be best.

FBIS did a detailed review comparing the DCI to a CAI. In his testing, he found they provided cooler IATs without any increase in wastegate duty cycles. Thus, it was not any harder to draw air using a CAI.

http://www.e90post.com/forums/showthread.php?t=449339

[enrita]

not again the CAI-DCI-Stock box discussion .... There are tons of test, please search.

[jcarv20s]

Hey guys, I just got my Cobb and am throwing P30FF codes every time I give it a good amount of gas. I'm trying to find a leak and I checked the lines behind the oil cooler and they are fine. I'm going to check the DV's tonight. Was wondering if you guys have any other ideas/place to check? I got the first two searching "P30FF" but figured I'd try here since the code/warning "reduced engine power" didn't come until I got the Cobb and flashed it to Cobb Stage 1 Aggressive. Car is an 08' 335xi E92 6MT. Nothing else done to the vehicle; has 32K on it. Also, side note, I've been reading the 4.01 Beta is available and am I just dumb (probably), cause I can't find it on Cobb's site for downloading. Any help is appreciated!