Worst dyno ever?

[img]

Dyno correction of 27% is not valid. Anything above/below 7% is invalid according to SAE J1349 horsepower correction specifications.

The weather station on the dyno is broken. You area reading ambient pressure of 24.14 inHg (817.14 mBar). That measurement is not possible on earth. Lowest pressure ever recorded on earth was 25.69 inHg (870 mBar). "Normal" pressure on earth is 29.92 inHg (1013 mBar). So you can see 24.14 inHg isn't possible and the weather station on the dyno needs to be fixed/replaced.

That explains the corrected results but not the uncorrected results. Frankly I wouldn't trust this dyno and would go somewhere else.

Ignore the suggestion to dyno in 5th gear even though it's 1:1. The suggestion is rooted in the myth that 5th gear has less drive train loss. In this transmission, it's actually the second least efficient gear. So if you dyno in 5th, you will probably see even lower results. Search the forums as this has been discussed a few times.

Here's a link to the dyno database where you can see about 500 dyno results for the m3. There's a quick link to show you all "stock" cars so you can see how yours compares.
http://www.rcollins.org/bimmertech/DynoDB.php

Good luck.

[signes]

Many thanks img. The same dyno has gotten "normal" results for the other cars, though I see the point about the weather station (also 5% humidity isn't possible even here.) I'll talk to them tomorrow and see if they know what is going on. We don't have tons of dyno options out here...

[Dave07997S]

Originally Posted by img

Dyno correction of 27% is not valid. Anything above/below 7% is invalid according to SAE J1349 horsepower correction specifications.

The weather station on the dyno is broken. You area reading ambient pressure of 24.14 inHg (817.14 mBar). That measurement is not possible on earth. Lowest pressure ever recorded on earth was 25.69 inHg (870 mBar). "Normal" pressure on earth is 29.92 inHg (1013 mBar). So you can see 24.14 inHg isn't possible and the weather station on the dyno needs to be fixed/replaced.

That explains the corrected results but not the uncorrected results. Frankly I wouldn't trust this dyno and would go somewhere else.

Ignore the suggestion to dyno in 5th gear even though it's 1:1. The suggestion is rooted in the myth that 5th gear has less drive train loss. In this transmission, it's actually the second least efficient gear. So if you dyno in 5th, you will probably see even lower results. Search the forums as this has been discussed a few times.

Here's a link to the dyno database where you can see about 500 dyno results for the m3. There's a quick link to show you all "stock" cars so you can see how yours compares.
http://www.rcollins.org/bimmertech/DynoDB.php

Good luck.

This makes me feel good as my dyno was in 5th and it hit 346hp and 260ft/lbs of tq.

Dave

[M3PO]

OP, I just got back from EAS. My car put down a disappointing 349 WHP with filter, pulley, HFC, x-pipe, and rear section. My car had the oldest software version. Tom flashed it to the newest file and it put down 372 WHP.

While doing the flash, Tom showed me the plots for an '08 with 48k miles, original plugs, and old software. The owner brought it in because it failed smog. It put down 308 WHP and the plot was rough like yours because it was misfiring (no codes though). With new plugs and software, it made 345 WHP.

[Rekrul]

Originally Posted by M3PO

OP, I just got back from EAS. My car put down a disappointing 349 WHP with filter, pulley, HFC, x-pipe, and rear section. My car had the oldest software version. Tom flashed it to the newest file and it put down 372 WHP.

While doing the flash, Tom showed me the plots for an '08 with 48k miles, original plugs, and old software. The owner brought it in because it failed smog. It put down 308 WHP and the plot was rough like yours because it was misfiring (no codes though). With new plugs and software, it made 345 WHP.

How would one know how old their software was? Would an aftermarket tune totally override this?

[signes]

Originally Posted by M3PO

OP, I just got back from EAS. My car put down a disappointing 349 WHP with filter, pulley, HFC, x-pipe, and rear section. My car had the oldest software version. Tom flashed it to the newest file and it put down 372 WHP.

While doing the flash, Tom showed me the plots for an '08 with 48k miles, original plugs, and old software. The owner brought it in because it failed smog. It put down 308 WHP and the plot was rough like yours because it was misfiring (no codes though). With new plugs and software, it made 345 WHP.

That gives me some hope (!) - your car is an 08, right? To be clear do you have a tune or just OEM software?

Originally Posted by Rekrul

How would one know how old their software was? Would an aftermarket tune totally override this?

They can find out what version of OEM software is running and that tells how old it is. From what I gather most tuners have most versions of "stock" OEM software that they can program onto the car, which sounds like what was done here.

[M3PO]

Originally Posted by Rekrul

How would one know how old their software was? Would an aftermarket tune totally override this?

We (EAS and I) were only able to tell by looking at my service history. You can't easily tell what version you have. Tom can only override what is on there with the newest version. The tuner (Sal for example) can tell once it has been read and sent to him. The aftermarket tune is a modified version of the stock software so starting with the best/newest software as a foundation for the tune will yield the best results.

Originally Posted by signes

That gives me some hope (!) - your car is an 08, right? To be clear do you have a tune or just OEM software?

They can find out what version of OEM software is running and that tells how old it is. From what I gather most tuners have most versions of "stock" OEM software that they can program onto the car, which sounds like what was done here.

Yeah, mine is an 08. I went to get a tune. My tune was based off of the oldest software version. Essentially, tuning the old version yielded the same gains as updating to the new, completely stock software. So my tune is being redone using the new software as the basis. It made 349 with my mods and stock old software; not good. It made 368 with the Evolve tuned version of my old software so I saw good gains with the Evolve tune. When we flashed it to the newest stock software, it made 372. I'm hoping for 390 with the tuned version of the new software.

[MDCTFTW]

Do any of you guys knows what SW versions there are? I have an 08 also and the last time I went in to the dealer they did the following reprogramming:

B28-01-20
PROGRAM CONTROL UNITS PER BMW NA
AS PER SIB 28 01 10
PERFORMED PROGRAMMING/ENCODING OF COMPLETE VEH

I have a DCT and the car had to stay overnight for this service.

[MDCTFTW]

Hmmm nevermind, I think mine was a DCT sw update

[M3PO]

Originally Posted by MDCTFTW

Hmmm nevermind, I think mine was a DCT sw update

I'm not so sure, it does say "COMPLETE VEH" which would lead me to believe they did the DME also.

[MDCTFTW]

Originally Posted by M3PO

I'm not so sure, it does say "COMPLETE VEH" which would lead me to believe they did the DME also.

Actually I think you're right. After some searching I found the attached which instructs BMW to use the latest ISTA/P. I got this service in November 2011 so hopefully I have updated sw.

Or maybe I should just get on a dyno one of these days.

[M3Denver]

Op So have you gotten your software changed to latest oem and re dynoed yet?

[signes]

Not yet, won't be able to do it until later this week.

[M3Denver]

Originally Posted by signes

Not yet, won't be able to do it until later this week.

Good luck this week!!

[M3PO]

Originally Posted by MDCTFTW

Actually I think you're right. After some searching I found the attached which instructs BMW to use the latest ISTA/P. I got this service in November 2011 so hopefully I have updated sw.

Or maybe I should just get on a dyno one of these days.

I believe that it's BMW's policy to upgrade ALL software when one module needs upgrading. If your DCT software was upgraded, I'm pretty sure that your DME was also.

[tom @ eas]

Originally Posted by M3PO

I believe that it's BMW's policy to upgrade ALL software when one module needs upgrading. If your DCT software was upgraded, I'm pretty sure that your DME was also.

BMW does not have the ability to upgrade individual modules, only what specific modules the latest ISTA release targets.

Autologic can update individual modules, which is preferred in some cases (for instance the seatbelt requirement to prevent the transmission shifting into neutral in 2.45 on DCT). Some cases require an entire module family to be updated as sometimes modules depend on others.

Each issue is a case by case basis. The person performing the coding should have a complete understanding before attempting to work on your vehicle.

[tom @ eas]

Originally Posted by M3PO

OP, I just got back from EAS. My car put down a disappointing 349 WHP with filter, pulley, HFC, x-pipe, and rear section. My car had the oldest software version. Tom flashed it to the newest file and it put down 372 WHP.

While doing the flash, Tom showed me the plots for an '08 with 48k miles, original plugs, and old software. The owner brought it in because it failed smog. It put down 308 WHP and the plot was rough like yours because it was misfiring (no codes though). With new plugs and software, it made 345 WHP.

I just received an update on this particular M3 this afternoon, it passed emissions with flying colors.

[Singletrack]

Originally Posted by tom @ eas

I just received an update on this particular M3 this afternoon, it passed emissions with flying colors.

That's great. Really sucks that the dealership didn't replace the plugs on time. The owner should complain to BMW USA.

[tom @ eas]

Originally Posted by Singletrack

That's great. Really sucks that the dealership didn't replace the plugs on time. The owner should complain to BMW USA.

Unfortunately, the car is already out of the warranty period.

It all comes down to proper maintenance, as well as troubleshooting.

[signes]

I went to the dealer to check the software version, only had time for them to scan the key not hook the car up to the diagnostic. My print out says "Integration Level Dealer: E89X-11-03-502". Can anybody decode what this relates to (231E, etc.)? Thanks.

[tom @ eas]

Originally Posted by signes

I went to the dealer to check the software version, only had time for them to scan the key not hook the car up to the diagnostic. My print out says "Integration Level Dealer: E89X-11-03-502". Can anybody decode what this relates to (231E, etc.)? Thanks.

You are on 2.41.x.

Unfortunately, without plugging into your DME I cannot tell what version you are for certain. For those that are local, we can quickly plug in and see what version you are on the spot:



This example shows version 231E.

[signes]

Thanks Tom.