Flash TUNE - Dyno Inside - Help

[epiphanyray]

Ok, so I have a 2013 F10 m5 with about 48,000 Miles. I shipped off ECUs to Awesome and reputable tuner (well known on this board). They sent my ECUS back, and then flashed my car with their tune (22+ psi boost etc etc). This tune based on others who have used them, delivers roughly 640-660 WHP + 650+ WTQ.

I have been dynoing the car here and there trying to determine why I am not hitting these numbers. So, I will post this here. I am not mechanically inclined, so, please bare with me.

Here are my concerns:

1) Dyno guy says I am running too Lean. He says I should be closer to 12.5-13 AFR. As you can see, I am almost at 16 in this dyno pull. All other pulls show I am close to 16 as well. How can this be corrected and can this result in considerable power loss?

2) Dyno guy says the "WAVES" in the power curves seem to be something wastegate related.

3) The tuning company after showing them a previous dyno pull (which looks pretty much identical to this one) said the following: "your wastegate is at 99% trying to build boost. Seems like either one of these two things: you have issue with vacuum going to the turbos, boost leak or somethign jamming the actuators.

View dyno sheet attached.

HELP ME GET TO the MAGIC 650/650 numbers. How can my AFR be corrected. Please instruct me. By the way, I have logs too if someone thinks this can help.

thanks!

[epiphanyray]

I can say that Charge pipes were the only mod on the car (for meth). But I am not running the meth now for the sake of seeing what the TUNE alone yields as far as performance. This is the only time something has been installed that comes close to the turbos/actuators. FYI

[allmotor_2000]

Ask your tuner to log the car parameters on the dyno else people here can only guess. Bizarre a tuner would speculate wastegates and not have any logs to diagnose the issue.

[apexlocator]

I think we have the same tuner. Here's a resent dyno showing my AFR being about 12:1. Your graph does show a pretty lean condition. What are all of your mods again? What type of fuel in your country?

[BadGTR]

Is this a joke? 16 A/F or even 14 thruout the pull ??? Do not get into boost. You are going to blow the motor up....

[BadGTR]

Originally Posted by epiphanyray

I can say that Charge pipes were the only mod on the car (for meth). But I am not running the meth now for the sake of seeing what the TUNE alone yields as far as performance. This is the only time something has been installed that comes close to the turbos/actuators. FYI

Was your tune setup with the meth and you just decided to not run it?

[epiphanyray]

Originally Posted by allmotor_2000

Ask your tuner to log the car parameters on the dyno else people here can only guess. Bizarre a tuner would speculate wastegates and not have any logs to diagnose the issue.

Hi there, yes, I showed him three logs from 3 pulls on the dyno. His responses (what I mentioned in my first post) was based on what he saw in the logs. So He is saying that he checked the logs, after the pulls on the dyno and saw that "my wastegate was at 99% trying to build boost." He said that on my last dyno run (a couple weeks ago), i had 1.4bar, which is low for a 200 load request. Somethign is preventing the car from building boost. (could be vacuum leak, wastegate jammed, boost leak).

[epiphanyray]

Originally Posted by apexlocator

I think we have the same tuner. Here's a resent dyno showing my AFR being about 12:1. Your graph does show a pretty lean condition. What are all of your mods again? What type of fuel in your country?

I only have a custom mufflers (axelback). Everything else is stock. I do have meth injection, but it is disabled to not skew actual tune numbers. This is what I mean, I saw that sheet you sent, and keep pointing at AFR as a potential culprit. I put 50/50% 93octane (which is really about 91), and 100 VP racing fuel. Balances out to abou 94-95octane. So fuel should not be the issue.

[epiphanyray]

Originally Posted by BadGTR

Was your tune setup with the meth and you just decided to not run it?

No, the tune was installed before METH. Meth is installed now but it is disabled. HOWEVER, the charge pipes are not the OEM ones. they are from BMS. Should i revert back to OEM chargepipes and see if that makes a difference?

I still keep looking at AFR though. Can this AFR be adjusted via adjustments in my flash tune? If this is adjusted, to more suitable levels, is it possible the car could yield an extra 40-50WHP?

[BadGTR]

Originally Posted by epiphanyray

No, the tune was installed before METH. Meth is installed now but it is disabled. HOWEVER, the charge pipes are not the OEM ones. they are from BMS. Should i revert back to OEM chargepipes and see if that makes a difference?

I still keep looking at AFR though. Can this AFR be adjusted via adjustments in my flash tune? If this is adjusted, to more suitable levels, is it possible the car could yield an extra 40-50WHP?

Wow man, I thought maybe this was a joke. Your air fuels are dangerously lean. Without a doubt you are leaving power on the table. But more importantly you are running a huge risk of blowing your motor up. I cannot believe a tuner would look at the air fuels and not be in panic mode.

[epiphanyray]

Originally Posted by BadGTR

Wow man, I thought maybe this was a joke. Your air fuels are dangerously lean. Without a doubt you are leaving power on the table. But more importantly you are running a huge risk of blowing your motor up. I cannot believe a tuner would look at the air fuels and not be in panic mode.

Reallyyyyy. Crap. Can this be corrected via the tuners flash settings?

[apexlocator]

Originally Posted by epiphanyray

I only have a custom mufflers (axelback). Everything else is stock. I do have meth injection, but it is disabled to not skew actual tune numbers. This is what I mean, I saw that sheet you sent, and keep pointing at AFR as a potential culprit. I put 50/50% 93octane (which is really about 91), and 100 VP racing fuel. Balances out to abou 94-95octane. So fuel should not be the issue.

OK, I'm going to ask the obvious, but are the vacuum lines to your new mufflers plugged?

[kevn23]

Holy moly 16:1... Even 14 is too high,but at least it dips ~12 at higher RPMs. Seems likely there are some hardware issues. No tune is this suicidal.

[epiphanyray]

Originally Posted by apexlocator

OK, I'm going to ask the obvious, but are the vacuum lines to your new mufflers plugged?

Yes vacuum lines to rear mufflers are totally plugged.

[epiphanyray]

Originally Posted by epiphanyray

Yes vacuum lines to rear mufflers are totally plugged.

Where should I begin. How do i correct this afr issue?

[apexlocator]

Does the car feel any different pre/post meth? Maybe check your charge pipe connections? Are you able to log boost pressure?

[epiphanyray]

Originally Posted by apexlocator

Does the car feel any different pre/post meth? Maybe check your charge pipe connections? Are you able to log boost pressure?

Didnt really do much testing pre meth. Cant tell. Have not had the car that long.

Sparkplugs are brand newwwww and gapped to .019 just as tuner suggested.

Can sparkplugs gapped that close cause afr issues? Again, can afr be corrected via tune adjustment?

[epiphanyray]

Thats the log.

https://www.dropbox.com/s/802fv9lpux...ept16.csv?dl=0

[TrevorM3]

uhm, first how about you reveal name of tuner.. dont hide them. Review whether positive or negative can help others make decisions regarding tunes. Customer service is more important than anything

And also, good on you for deicing on no meth. A flash tune, and tires is all this car needs.

[apexlocator]

Originally Posted by epiphanyray

Didnt really do much testing pre meth. Cant tell. Have not had the car that long.

Sparkplugs are brand newwwww and gapped to .019 just as tuner suggested.

Can sparkplugs gapped that close cause afr issues? Again, can afr be corrected via tune adjustment?

If there is an underlying hardware issue causing vacuum leak/ boost not to build, software flash will not fix that.

Up to OP to name tuner, but I think he's using same as I am.

[epiphanyray]

Originally Posted by apexlocator

If there is an underlying hardware issue causing vacuum leak/ boost not to build, software flash will not fix that.

Up to OP to name tuner, but I think he's using same as I am.

I understand that if there is hardware issue, Flash tune will not correct this. But logs show I am pretty close to Full boost (around 22). Chargepipes area is sealed correctly and has been inspected. (I guess I can do a boost leak, but again, log shows car is getting up to boost).

[kevn23]

Originally Posted by epiphanyray

I understand that if there is hardware issue, Flash tune will not correct this. But logs show I am pretty close to Full boost (around 22). Chargepipes area is sealed correctly and has been inspected. (I guess I can do a boost leak, but again, log shows car is getting up to boost).

Can you go back to the stock tune and redyno?