[Mannix]

A couple days ago I had the Dinan Stage 2 software installed in my car. There were no other required parts for the N55. I have no oil cooler. Nor have I any other upgrades. The car was completely stock, except for some coding and the Alpina B3 transmission flash.

Here are the dyno runs I made on 29 October. The dashed lines represent a curve-fitted line, which is a polynomial of the 10th order.

Stock Run 1
Raw data
Ft-lbs: 290.65 @ 3600
Hp: 289.27 @ 6150
Fitted data
Ft-lbs: 290.30 @ 3550
Hp: 286.90 @ 6150



Stock Run 2
Raw data
Ft-lbs: 295.79 @ 4350
Hp: 297.44 @ 6150
Fitted data
Ft-lbs: 288.46 @ 3800
Hp: 293.81 @ 6050



Stock Run 3
Raw data
Ft-lbs: 292.81 @ 4350
Hp: 296.29 @ 6100
Fitted data
Ft-lbs: 288.28 @ 4450
Hp: 292.02 @ 6100



Here are the runs with the Dinan S2 software, made 01 November:

Dinan Run 1
Raw data
Ft-lbs: 348.30 @ 3500
Hp: 294.84 @ 5300
Fitted data
Ft-lbs: 347.97 @ 3350
Hp: 293.84 @ 5500



Dinan Run 2
Raw data
Ft-lbs: 351.92 @ 3600
Hp: 302.59 @ 5400
Fitted data
Ft-lbs: 349.93 @ 3500
Hp: 301.66 @ 5500



Dinan Run 3
Raw data
Ft-lbs: 352.45 @ 3400
Hp: 305.78 @ 5350
Fitted data
Ft-lbs: 350.92 @ 3400
Hp: 304.17 @ 5450



Dinan Run 4
Raw data
Ft-lbs: 348.77 @ 3050
Hp: 300.51 @ 5600
Fitted data
Ft-lbs: 348.02 @ 2900
Hp: 298.11 @ 5450



Here is a comparison of my best stock run with my best Dinan run (raw data)



The same runs with curve-fitted data



The difference between the Dinan and stock is shown here. Using the raw data, the largest increases are...
Ft-lbs: 68.16 @ 3450
Hp: 43.18 @ 4100



The difference between the Dinan and stock is shown here. Using the fitted data, the largest increases are...
Ft-lbs: 65.97 @ 3350
Hp: 42.68 @ 3450



Dinan claims the stage 2 sofware will offer a maximum torque gain of 74 ft-lbs @ 3900 rpm, and a maximum power gain of 55 hp @ 3900 rpm.

So the gains I experienced are close to their claims. A little less horsepower than I hoped.

However, they also claim a peak horsepower of 355 @ 5300 rpm. I'm not even close to that.

And they claim peak torque of 401 ft-lbs @ 5300 rpm (that must be a typo, because that would mean over 400 hp at 5300 rpm).

I'm not even close to that peak torque.

The software is close to doing what Dinan claims it will do, except for the peaks. And I find that disappointing. Furthermore, above 6000 rpm, there is actually LESS torque and horsepower than stock! That's unacceptable.

So, the bottom line:

Stock torque: 295.79 @ 4350 (288,46 @ 3800)
Stock power: 297.44 @ 6150 (293.81 @ 6050)

Dinan S2 torque: 352.45 @ 3400 (350.92 @ 3400)
Dinan S2 power: 305.78 @ 5350 (304.17 @ 5450)

I got a whopping 8.34 (10.33) more peak horsepower. I should have got the Cobb.

For Dinan drag strip results, click here:

http://www.e90post.com/forums/showthread.php?t=1055818

[Harry335i]

Are their claims at the wheels or at the crank?

[evo335xi]

I believe at the crank. If you don't go over 6000 the gains should be pretty noticeable. I'm guessing boost taper,heat soak, and a small turbo makes them not push it too much at redline. So decent settings for around town and onramps/passing

[Johnny Boost]

What's the retail price on dinan s2?

[Mannix]

Can you run a Cobb or JB4 on top of a Dinan-flashed ECM?

[Johnny Boost]

Originally Posted by Mannix

Can you run a Cobb or JB4 on top of a Dinan-flashed ECM?

With Cobb, I know you can. I think you can with JB4 also but I'm not sure exactly how that works.

[Curare86]

Originally Posted by Mannix

Can you run a Cobb or JB4 on top of a Dinan-flashed ECM?

Both would work, but youd just be replacing the dinan flash, its no better than running cobb/jb4 while oem

[Dark_Knight_335]

Wonder what my stage 3 would render. I've always wanted to do a dyno...this is the next best thing - thank you.

[SMH]

Thanks for these dyno results, I've been wanting to get a tune and the Dinan Headquarters is super close to me. Now i'm thinking of going with the S2 over the ppk when i get my car back from recall service.

[Dark_Knight_335]

The Dinan flash is a torque beast, and conservative in horsepower- much better than the PPK though.

[Mannix]

After I get the intercooler installed, I'll post more dyno results.

[Dark_Knight_335]

If you're going that route, may as well go all in with the oil cooler and Stage 3

[3002 tii]

Really impressive. I've been thinking over Dinan S2... wonder if I can get away with S3 with just a FMIC since PPK v2 includes upgraded oil cooler (and I have the PE which shouldn't be very different from the Dinan free flow exhaust).

Your car must be a hoot to drive =D

[Mannix]

Originally Posted by Dark_Knight_335

If you're going that route, may as well go all in with the oil cooler and Stage 3

Oil cooler is on order too. However, in addition to the intercooler and oil cooler, Stage 3 requires exhaust. I spent quite a bit so far. So it may be a couple of pay days before I cough up the dough for the exhaust, plus another 500 clams for the software.

[Mannix]

Originally Posted by 3002 tii

Really impressive. I've been thinking over Dinan S2... wonder if I can get away with S3 with just a FMIC since PPK v2 includes upgraded oil cooler (and I have the PE which shouldn't be very different from the Dinan free flow exhaust).

Your car must be a hoot to drive =D

They won't even install the software unless you have the required supporting mods. But they don't necessarily have to be Dinan mods.

[FL335]

I'm confused. I have an 09 and I have an oil cooler...stock. I know the early build 07s didn't have them from the factory. Did the N55 not come with a stock OC?

Also, as I have much respect for Dinan, their tunes are very conservative. A Cobb stage 1 Aggressive us putting down more power than that stage 2. Cobb is notoriously has safe tunes as well...just my .02...cheaper too.

[Dark_Knight_335]

Originally Posted by Mannix

Oil cooler is on order too. However, in addition to the intercooler and oil cooler, Stage 3 requires exhaust. I spent quite a bit so far. So it may be a couple of pay days before I cough up the dough for the exhaust, plus another 500 clams for the software.

Yeah I dipped pretty deep when I did my stage III all at once- that hurt just a bit LOL

[Ozzie335i]

Originally Posted by Mannix

They won't even install the software unless you have the required supporting mods. But they don't necessarily have to be Dinan mods.

For Dinan Stage 3 you must also purchase their oil cooler and intercooler, .but the exhaust is not necessary. It does sound and look excellent though. The stage 3 does not seem all that much more powerful than the Stage 2 on paper. On paper. However, the Stage 3 does continue to pull right up close to red line. 15 psi max, per a call to Dinan tech services.

If I did not have CPO on my 2011, I would have gone the Cobb route. It's all about protecting your investment. For real power out of an N55, wait for the Pure Stage 2, get a charge pipe and Cobb, and let her rip.

[///Machiavelli]

Originally Posted by 3002 tii

Really impressive. I've been thinking over Dinan S2... wonder if I can get away with S3 with just a FMIC since PPK v2 includes upgraded oil cooler (and I have the PE which shouldn't be very different from the Dinan free flow exhaust).

Your car must be a hoot to drive =D

If you're referring to the cooler in the driver side wheel well, that is in fact an auxiliary water radiator not an oil cooler

[///Machiavelli]

Originally Posted by Mannix

They won't even install the software unless you have the required supporting mods. But they don't necessarily have to be Dinan mods.

I don't think that is entirely true. My understanding is that they will install stage 3 software sans supporting mods but you have to sign a waiver that dinan isn't responsible for any issues.

Since the Dinan warranty is the best justification for their higher price point vs cobb, jb4 (excluding those with unsupported dme) it kind of seems counter productive to me.

[Mannix]

Originally Posted by FL335

I'm confused. I have an 09 and I have an oil cooler...stock. I know the early build 07s didn't have them from the factory. Did the N55 not come with a stock OC?

Some did. Some did not. Mine did not.

I think those with the M Sport package came with oil coolers.

[mike5809]

Originally Posted by Mannix

Some did. Some did not. Mine did not.

I think those with the M Sport package came with oil coolers.

I have M-Package and did not get an Oil Cooler. MANY threads on this - someone on the boards actually sued BMW (and lost). Turns out there was a glitch in the software regarding the packages and some vehicles were unable to be equipped with the Oil Cooler.

For me, xDrives that are M-Sport & have the 18in summer whee/ tire package should have gotten the oil cooler as it should have also added the High Speed Rev Limiter as an option. But they were transitioning out the old sport/m-sport package and as I said it was causing issues with the computers so many builds never came with the High Speed Rev Limiter option (S841 I think) which is required for the Oil Cooler. There are crazy threads on this and shady responses by BMW.

I called BMWNA many times and it took them 3 months to come back and just say "Unfortunately your car doesn't have an oil cooler and there is no retro kit".