[BMW DRIVEN]

A couple of you pointed out that the WGDC has a tendency to be inconsistent in the upper rpm range. Here are the datalogs. Please share your opinions.

[n55david]

Originally Posted by BMW DRIVEN

A couple of you pointed out that the WGDC has a tendency to be inconsistent in the upper rpm range. Here are the datalogs. Please share your opinions.

https://youtu.be/PpbDG5AOjAU

That's a video not data logs

[ZM2]

Originally Posted by n55david

That's a video not data logs

[n55david]

That was my opinion. I mean. A video of a "log" doesn't really give us much to give an opinion on.. I mean.. fuck man

[n55david]

Let.me try..

Does this look right? It sounds weird

[harkes]

[mike@x-ph.com]

OP please send a link of your datalog and we'll check it out

[BMW DRIVEN]

Originally Posted by n55david

That was my opinion. I mean. A video of a "log" doesn't really give us much to give an opinion on.. I mean.. fuck man

Yes, it's a video lol. That includes datalogs. Here are clickable links if you'd like to review them.

https://www.bootmod3.net/log?id=6271...90c66c2a211dce
https://www.bootmod3.net/log?id=6271...0b433ba3a50bda
https://www.bootmod3.net/log?id=6271...90c66c2a211dcf

[harkes]

MAF values: 1126 pounds / minute = 8512.41681 grams / second = 10640 crank HP........ what am I missing here???

[mike@x-ph.com]

Originally Posted by BMW DRIVEN

Yes, it's a video lol. That includes datalogs. Here are clickable links if you'd like to review them.

https://www.bootmod3.net/log?id=6271...90c66c2a211dce
https://www.bootmod3.net/log?id=6271...0b433ba3a50bda
https://www.bootmod3.net/log?id=6271...90c66c2a211dcf

What mods do you have on the car?

[thejeremyman9]

Originally Posted by harkes

MAF values: 1126 pounds / minute = 8512.41681 grams / second = 10640 crank HP........ what am I missing here???

The BM3 datalogs have had a MAF issue for a while now

[BMW DRIVEN]

Originally Posted by mike@x-ph.com

What mods do you have on the car?

Intake
Intercooler
Downpipe
Inlet
Chargepipe
Exhaust
BM3

[mike@x-ph.com]

Originally Posted by BMW DRIVEN

Intake
Intercooler
Downpipe
Inlet
Chargepipe
Exhaust
BM3

Which intercooler?

[thejeremyman9]

Why would you say cyl 1 is always a problem? That's not really a thing.

I assume at the end you were talking about how i brought up WGDC. You seem really fixed on the numbers, which is a good thing for digging into the details and comparing the thresholds, but you also need to look at the actual shape of the curves qualitatively. You can usually see right away if something doesnt look right as most curves should be smooth. See screenshot below from your log, you can see WGDC is erratic and in turn this effects everything from boost to AFR.

[BMW DRIVEN]

Originally Posted by mike@x-ph.com

Which intercooler?

VRSF Intercooler

[BMW DRIVEN]

Originally Posted by thejeremyman9

Why would you say cyl 1 is always a problem? That's not really a thing.

I assume at the end you were talking about how i brought up WGDC. You seem really fixed on the numbers, which is a good thing for digging into the details and comparing the thresholds, but you also need to look at the actual shape of the curves qualitatively. You can usually see right away if something doesnt look right as most curves should be smooth. See screenshot below from your log, you can see WGDC is erratic and in turn this effects everything from boost to AFR.

Absolutely, thanks for pointing out the WGDC that definitely helped me figure out the issue.

I have heard others in the B58 community state that cylinder 1 timing seems to drop more than others. It's interesting because I notice the same phenomenon on my logs.

[mike@x-ph.com]

Originally Posted by BMW DRIVEN

Absolutely, thanks for pointing out the WGDC that definitely helped me figure out the issue.

I have heard others in the B58 community state that cylinder 1 timing seems to drop more than others. It's interesting because I notice the same phenomenon on my logs.

During your second and third pulls, IAT is rising 30 degrees on a single gear pull and causing timing drops on all cylinders. The intercooler needs to be changed.

[thejeremyman9]

Originally Posted by mike@x-ph.com

During your second and third pulls, IAT is rising 30 degrees on a single gear pull and causing timing drops on all cylinders. The intercooler needs to be changed.

I noticed the same thing. Seemed like way too much IAT rise. If its a 5'' VRSF its too small.

[n55david]

Originally Posted by mike@x-ph.com

During your second and third pulls, IAT is rising 30 degrees on a single gear pull and causing timing drops on all cylinders. The intercooler needs to be changed.

Not if it's back to back to back runs on a dyno.. thats to be expected. You can't get enough airflow to deal with heat soak.

[thejeremyman9]

Originally Posted by n55david

Not if it's back to back to back runs on a dyno.. thats to be expected. You can't get enough airflow to deal with heat soak.

I was thinking about that as a factor, but in my mind that would make the IATs increase from run to run (not enough air to cool the IC back down), but that wouldnt necessarily mean the IATs would rise a lot in a single run right? Because that is dictated by IC size/performance and not really airflow through the IC.

[n55david]

Originally Posted by thejeremyman9

I was thinking about that as a factor, but in my mind that would make the IATs increase from run to run (not enough air to cool the IC back down), but that wouldnt necessarily mean the IATs would rise a lot in a single run right? Because that is dictated by IC size/performance and not really airflow through the IC.

We don't know the times between runs is the problem or the setup.. but we know they didn't do that every run. So going by my expirience runningntwo different dynos in the past. I'm guessing that's what it is.

[BMW DRIVEN]

Originally Posted by n55david

We don't know the times between runs is the problem or the setup.. but we know they didn't do that every run. So going by my expirience runningntwo different dynos in the past. I'm guessing that's what it is.

They did all 3 pulls back to back to back. No cooling periods whatsoever.