Back to Back Dyno Comparision: Stock CP vs. Dinan Stage 1 Tune

[houstonT]

Like many of you, I've been on the fence regarding doing a tune on my M5. I love my 2014 CP M5 and love these cars so much I've had two M5's...my first was a 2013 M5. I love how the car is under-rated and my assertion has always been that these cars are under-rated from the factory. However, I am a car freak and so stock is never good enough.

The Dinan tune was attractive mostly because it essentially came with a warranty and would be installed by a BMW dealership. Furthermore, my dealer told me that if the tune didn't work, they would refund me (I've read stories about tunes being installed improperly and about the Dinan tune "not working" so I was a bit worried).

I visited a good friend of mine at Autobanh Motorsports in Houston to dyno the car bone stock. She made 519.65 rwhp. This was the second pull I did with the car (so it was a bit heat soaked, for reference the car made 537 rwhp on the first pull but I decided that for comparison's sake, I would use the lower number - more on that later).

Got the tune installed at Momentum BMW in Houston, went back to the dyno. Car layed down 572.06 rwhp with the Dinan tune and showed impressive gains throughout the whole RPM range.

The reason I am using the 519 rwhp to compare is that I didn't have time to fully cool the car to do a hail mary non-heat soaked pull. Sooooooooo, in order to preserve as much of an apples to apples comparison I used my stock "heat soaked" number to compare to my tuned "heat soak" number. Car feels strong on the street. The only thing I regret not doing is a 60-130 and 100-150 pull stock so that I could compare to those same metrics tuned. I think the 60-130 will suffer a bit as the car spins to the top of 2nd (80 mph or so). I will post v-box numbers for 60-130 and 100-150 this weekend.







Of note: I do not believe in artificially inflating numbers by using the STD correction factor, so I used SAE. Correction factor on stock pulls was 0.99 and on tuned pulls was 0.98. Also, using a 15% driveline loss, looks like the motor is making 611 HP stock and 675 tuned. Not bad!

[bronch]

So, only mod is the Dinan 1? No intake or exhausts mods? Even if you throw out the the 519hp and keep the 537hp that's an impressive improvement, imo. Same dyno, temp, etc...?

[somer]

Did you have charcoal filters removed?

[houstonT]

Literally BONE STOCK with ZERO mods to only tune. Stock filters, stock exhaust, no charcoal mod.......I plan to 60-130 and 100-150 soon

As for conditions. Almost identical.

[M5Rlz]

Very nice. I am very impressed with Dinans work on these cars and I was a big skeptic.

[Bowser330]

Very nice numbers and very fair apples to apples comparison.

[DrewM5]

Crap - this thread just cost me $$$$$!!!

[Bowser330]

Originally Posted by DrewM5

Crap - this thread just cost me $$$$$!!!

How so please explain....

[DrewM5]

Now I am going to spend those $$$$ at Dinan.

[Dinan_Engineering]

Originally Posted by DrewM5

Now I am goind to spend those $$$$ at Dinan.

And you won't regret it either.

[spdrcrgtr]

Maybe im a newbie, but that are you referring to the "60-130" etc?

[DrewM5]

60 mph to 100 mph runs.

[turbo8765]

Do you have the torque graphs? What did it run 60-130?

[bmwMcrzy]

What kind of dyno was used ?

[e92MMM]

was this with the updated map that dinan released a bit afterwards?

[houstonT]

Drew and turbo I haven't done 60-130's or 60-100's yet but will.

BMW it was a dynojet

e92 not sure. When was it released?

[EuroKar]

The software update was released a few weeks back.
I'd say about 5 weeks ago or so... There is a post somewhere here that Dinan posted up the news

[houstonT]

Well car was tuned end of October. I wonder how I can check? Dinan talk to me?

[Dinan_Engineering]

Originally Posted by houstonT

Well car was tuned end of October. I wonder how I can check? Dinan talk to me?

PM me the last 7 of your VIN and I will look it up. I dont have the switchover date in front of me but end of October seems like right around the same time we released it so I think you have the updated firmware/software. I'll double check though...

UPDATE: Confirmed. HoustonT was/is running the newest version of software/firmware.

[turbo8765]

So what was the trq at the wheels pre/post tune?

[Lerxst M4]

Originally Posted by houstonT

Literally BONE STOCK with ZERO mods to only tune. Stock filters, stock exhaust, no charcoal mod.......I plan to 60-130 and 100-150 soon

As for conditions. Almost identical.

Hey HoustonT, I just picked up a 13 Frozen Red M5 from Momentum and have been thinking of the Dinan tune. Did you just hook up with your SA to purchase and install?

I've been in an E90 M3 for the last 3 years and James Crowe at Momentum has been my SA and has always been great. He mentioned the Dinan when he heard I was moving into the F10 as their service manager ha a similar set up from what I hear.

[houstonT]

Message me you cell. I'll get you hooked up with the service manager.