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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > Dinan stage 2 vs stock N55: drag strip results



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      11-08-2014, 03:16 AM   #1
Mannix
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Dinan stage 2 vs stock N55: drag strip results

I've been to the drag strip 5 times while my car was stock. Here are the averages:

11/07/2014 (let the transmission shift itself in D and S modes)

60: 2.341
330: 6.258
660: 9.455 @ 77.515
1000: 12.206
1320: 14.518 @ 96.963

15/08/2014

60: 2.175
330: 5.990
660: 9.115 @ 79.585
1000: 11.811
1320: 14.096 @ 98.977

19/09/2014

60: 2.205
330: 6.003
660: 9.085 @ 80.240
1000: 11.741
1320: 14.000 @ 100.05

27/09/2014

60: 2.214
330: 5.986
660: 9.094 @ 79.50
1000: 11.801
1320: 14.082 @ 99.25

10/10/2014

60: 2.154
330: 5.923
660: 9.024 @ 80.32
1000: 11.707
1320: 13.974 @ 99.54

And here is the average of my runs with the Dinan Stage 2 installed. No other mods except for Alpina B3 flash

07/11/2014

60: 2.126
330: 5.728
660: 8.653 @ 84.95
1000: 11.165
1320: 13.272 @ 107.19

And here's my BEST run with the Dinan:

60: 2.035
330: 5.621
660: 8.538 @ 85.71
1000: 11.047
1320: 13.151 @ 107.45


This performed a LOT better than I expected. Especially given my crappy dyno pulls with the Dinan.

Dinan: redeemed.

For Dinan dyno results, click here:

http://www.e90post.com/forums/showthread.php?t=1053503

Last edited by Mannix; 11-08-2014 at 11:55 AM.
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      11-08-2014, 03:44 AM   #2
e92proper
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What are the mods required for Dinan stage 2?
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      11-08-2014, 10:51 AM   #3
Mannix
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Quote:
Originally Posted by e92proper View Post
What are the mods required for Dinan stage 2?
For the E92 N55: none.
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      11-08-2014, 11:42 AM   #4
e92proper
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Quote:
Originally Posted by Mannix
Quote:
Originally Posted by e92proper View Post
What are the mods required for Dinan stage 2?
For the E92 N55: none.
Why they have a stage 1 tune then? There has to be requirements like an upgrade oil cooler or fmic or some shit right?
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      11-08-2014, 11:50 AM   #5
Mannix
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Quote:
Originally Posted by e92proper View Post
Why they have a stage 1 tune then? There has to be requirements like an upgrade oil cooler or fmic or some shit right?
I don't know.

If you look on their web site, regarding the Stage 2, it says:

Quote:
Required Items: None
And on the software available for my car, there is no Stage 1 listed.

For Stage 3, you need the following:

Quote:
Required Items: Free Flow Exhaust, High Capacity Oil Cooler and High Performance Intercooler are required.
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      11-08-2014, 05:13 PM   #6
Johnny Boost
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No change in fuel, tires or launch method? I'm a little skeptical that 9 whp shaved a full second off your 1/4 mile but congrats either way!
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      11-08-2014, 07:52 PM   #7
Mannix
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Quote:
Originally Posted by Johnny Boost View Post
No change in fuel, tires or launch method? I'm a little skeptical that 9 whp shaved a full second off your 1/4 mile but congrats either way!
No changes. As I said, it was a lot better than what I expected.

But trap speed is more important than ET in estimating peak horsepower. You can use ET, but the standard deviation is more than trap speed.

Some equations:

Huntington (1950s):

MPH = 224(hp/weight)^1/3
ET = 6.290(weight/hp)^1/3

weight*(MPH/224)^3=hp
weight*(6.290/ET)^3=hp

Fox (1964):

MPH = 230(hp/weight)1/3
ET = 6.269(weight/hp)1/3

weight*(MPH/230)^3=hp
weight*(6.269/ET)^3=hp

Hale (1986):

MPH = 234(hp/weight)^1/3
ET = 5.825(weight/hp)^1/3

weight*(MPH/234)^3=hp
weight*(5.825/ET)^3=hp

Lucias "ideal" (2011):

MPH = 231.3027(hp/weight)^1/3
ET = 6.1178(weight/hp)^1/3

weight*(MPH/231.3027)^3=hp
weight*(6.1178/ET)^3=hp

Lucias "best fit" (2011):

MPH = 215.39(hp/weight)^0.3018
ET = 7.3571(weight/hp)^0.2574

weight*(MPH/215.39)^1/0.3018=hp
weight*(7.3571/ET)^1/0.2574=hp

Weight was 3745 with me in the car.

On my average runs,

Huntington:

From ET From MPH
304.57 303.75 stock average of 4 runs
332.74 323.08 stock average of 6 runs
339.62 333.72 stock average of 9 runs
333.75 325.73 stock average of 7 runs
341.52 328.59 stock average of 3 runs
398.64 410.38 Dinan average of 6 runs
+62.09 +82.07 Dinan gain over weighted average of stock runs (excluding the 1st set where I did not shift manually)


Fox:

301.53 280.59 stock average of 4 runs
329.42 298.45 stock average of 6 runs
336.23 308.28 stock average of 9 runs
330.42 300.90 stock average of 7 runs
338.11 303.54 stock average of 3 runs
394.66 379.10 Dinan average of 6 runs
+61.47 +75.81 Dinan gain over weighted average of stock runs

Hale:

241.89 266.45 stock average of 4 runs
264.26 283.40 stock average of 6 runs
269.73 292.74 stock average of 9 runs
265.07 285.73 stock average of 7 runs
271.24 288.24 stock average of 3 runs
316.60 359.99 Dinan average of 6 runs
+49.31 +71.99 Dinan gain over weighted average of stock runs

Lucias "ideal"

280.23 275.88 stock average of 4 runs
306.15 293.43 stock average of 6 runs
312.49 303.10 stock average of 9 runs
307.08 295.84 stock average of 7 runs
314.23 298.44 stock average of 3 runs
366.79 372.73 Dinan average of 6 runs
+57.13 +74.54 Dinan gain over weighted average of stock runs

Lucias "best fit"

267.05 266.03 stock average of 4 runs
299.47 284.79 stock average of 6 runs
307.52 295.17 stock average of 9 runs
300.65 287.38 stock average of 7 runs
309.74 290.16 stock average of 3 runs
378.42 370.90 Dinan average of 6 runs
+74.49 +81.00 Dinan gain over weighted average of stock runs

Link to equations: http://www.stealth316.com/2-calc-hp-et-mph.htm
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      11-08-2014, 08:01 PM   #8
Mannix
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Somebody sent me a PM and told me I needed to give the Dinan software more time to adapt. When I had it dynoed, I did it the day after the software was installed. I had driven 200+ miles after the installation and before the dyno. I thought it was enough.

Maybe it wasn't enough.

I ran at the drag strip 1 week after the installation of the Dinan software. So maybe the software "adapted" and gave the gains Dinan claimed. And then some. It was about ~15 degrees cooler when I ran with the Dinan vs running stock, and on the dyno.

My first run with the Dinan was the best: 13.151 @ 107.45

And even though the temperature continued to drop that evening, I was unable to eclipse that run.

I launched ~2000 rpm and punched it. DTC was on, and it felt like I was hitting the rev limiter when the wheels were trying to break loose. I thought that killed my 60', but that run happened to be my 2nd best 60' of the night. The best was 2.035 and the first was 2.051
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      11-08-2014, 08:59 PM   #9
Johnny Boost
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Quote:
Originally Posted by Mannix
Somebody sent me a PM and told me I needed to give the Dinan software more time to adapt. When I had it dynoed, I did it the day after the software was installed. I had driven 200+ miles after the installation and before the dyno. I thought it was enough.

Maybe it wasn't enough.

I ran at the drag strip 1 week after the installation of the Dinan software. So maybe the software "adapted" and gave the gains Dinan claimed. And then some. It was about ~15 degrees cooler when I ran with the Dinan vs running stock, and on the dyno.

My first run with the Dinan was the best: 13.151 @ 107.45

And even though the temperature continued to drop that evening, I was unable to eclipse that run.

I launched ~2000 rpm and punched it. DTC was on, and it felt like I was hitting the rev limiter when the wheels were trying to break loose. I thought that killed my 60', but that run happened to be my 2nd best 60' of the night. The best was 2.035 and the first was 2.051
Ya that could definitely be true. Flash tunes take some time to adapt. Maybe also try turning the traction control off completely.
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      11-09-2014, 02:26 AM   #10
Mannix
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Quote:
Originally Posted by Johnny Boost View Post
Ya that could definitely be true. Flash tunes take some time to adapt. Maybe also try turning the traction control off completely.
I've tried that. Even before the Dinan tune. The tires go up in smoke off the line.

I will eventually install a limited slip differential.
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      11-10-2014, 09:25 AM   #11
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8mph in the 1/4 is definitely much more than 9whp. Not bad!
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      11-10-2014, 09:33 AM   #12
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Yes area under the curve will be more influential than peak numbers. Makes sense if you stay in the meat of the powerband! Nice results
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      11-10-2014, 01:04 PM   #13
Mannix
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Here's a graph which you might find interesting. It compares horsepower to mph for my average of Dinan runs and my average of stock runs.

First, using the existing quarter mile data, I had to fit a curve to it.

Once I fitted a curve, I calculated distance, velocity, RPM, and horsepower for each step. The step size was 0.001 s.

To calculate horsepower, I just took the energy difference between the current point and the previous point, where E=1/2 m v^2, and divided by the step size.

The power is actual power after drivetrain and wind resistant loses.

This is why I plotted them against mph. Because at a given mph, wind resistant loses should be the same for both lines.

So the difference between the two lines should be only due to the difference in engine power after drivetrain losses.


Last edited by Mannix; 11-10-2014 at 01:14 PM.
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      11-13-2014, 06:39 PM   #14
D's Bimmer
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I have had the Dinan Stage II on my 2011 e90 since it came out. While it may be on the high side of the tuner cost it is still a great tune for this car. Yes, it could be more aggressive but for my needs it is great. I will look at a different tune if I decide to change my turbo down the line though. I hear Dinan has been workin on the N55 and some news coming out next spring possibly.
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