[parky1215]

I got OBDII flash tune from Gintani/OE Tuning today for my 135i DCT with following performance modifications.

Injen Intake
Evolution Racewerks FMIC + Charge Pipe
iCarbon high flow catted downpipe
BMW Performance exhaust (axleback only) with stock midpipe

Another member here with N55 335i with downpipe only (not DCT) got flash tune from OE Tuning last week. His baseline run was about 260whp and 280wtq on Dyno Dynamics (I heard this dyno give number lower than even Mustang dyno).

Considering that my car is full bolt-on, I expected to see dyno number higher than 260whp.
To my surprise, when Jeremy @ OE Tuning run baseline run, I only got 240whp.

After Jeremy got few baseline runs, he began loading tune via OBDII port from his laptop.
I think this process took less than 10 minutes.

After we let the car adapt to the change, we run the dyno again and found out that we gained approximately 40+hp and 55+tq across the rpm range putting down final number of 277whp and 285wtq.
This gain seems to be in line with 335i that got tuned last week.
What I don’t understand is why my dyno number is reading so low. It should read higher than 335i’s dyno considering that I have more performance mods.

At least, my car seems to be pulling strong even at upper RPM range (6000-6750) compare to that 335i (see graph).

My 135i DCT with full bolt-on


For comparison, here is the dyno chart of 335i flashed with same tune and dyno # from same dyno
335i with downpipe


Please chime in and share your dyno expertise (this is first time I got dyno).
I believe Jeremy ran dyno on 4th gear (not sure if he turned the traction control off or not).

Other than the crappy dyno number, my car definitely pulls stronger than stock tune.
I will let car adapter for few more days and see how much I gain.
BTW, after the tune, I noticed that my exhaust gurgles where it didn’t before (ex. when slowing down the car with no foot on the gas pedal, exhaust gurgles occasionally at 3000 rpm and lower).

FYI, according to Jeremy, tune is making my car run at 14psi and it also auto deletes downpipe code (no need to have CAN Tool anymore!)
BTW, Jeremy is a great guy! Thanks for the tune.

[FrankiE90]

congrats on the tune -

[Andrew@ET]

dcts seem to be tricky to dyno

[nkadisha]

my car was the 335i..I'm really surprised your car didn't put more power down


was it hot at gintani when you were doing the pulls?

[BMWfan07]

Originally Posted by nkadisha

my car was the 335i..I'm really surprised your car didn't put more power down


was it hot at gintani when you were doing the pulls?

Yes, it seems the heat affects the N55 quite a bit more than my previous N54. I really did not notice that much difference in power due to hot weather with the N54, but with the N55 the difference is quite noticeable to me. My car runs much stronger on a cool morning than it does after it gets hot outside later in the day. I am not an expert and I dont know why there is such a difference in how the heat affects this engine, but I am thinking the intake difference between the N54 and N55. I wish I knew how to minimize the affects of the hot ambient temperatures on my car's performance.

[parky1215]

Originally Posted by nkadisha

my car was the 335i..I'm really surprised your car didn't put more power down


was it hot at gintani when you were doing the pulls?

I did mine around 9:30am Saturday. I think temp wise, it was around 80 degree.

[Keik E92 M3]

So how much is this tune? Someone PM the price.

[parky1215]

Originally Posted by keikdasneak

So how much is this tune? Someone PM the price.

sent you pm. tune was pretty cheap.

[nkadisha]

Originally Posted by BMWfan07

Yes, it seems the heat affects the N55 quite a bit more than my previous N54. I really did not notice that much difference in power due to hot weather with the N54, but with the N55 the difference is quite noticeable to me. My car runs much stronger on a cool morning than it does after it gets hot outside later in the day. I am not an expert and I dont know why there is such a difference in how the heat affects this engine, but I am thinking the intake difference between the N54 and N55. I wish I knew how to minimize the affects of the hot ambient temperatures on my car's performance.

I also notice the slower feeling while in the hot, but our engines don't seem to have nearly as big as a cooling problem than the N54s..I have a few friends with the n54 and every time we run together their temperatures get crazy high while mine stays normal. The N55 cools rather quick at the track too.

[JRubin13]

Originally Posted by nkadisha

I also notice the slower feeling while in the hot, but our engines don't seem to have nearly as big as a cooling problem than the N54s..I have a few friends with the n54 and every time we run together their temperatures get crazy high while mine stays normal. The N55 cools rather quick at the track too.

my car dosnt get that hot that fast....

[nkadisha]

Originally Posted by JRubin13

my car dosnt get that hot that fast....

Remember that day up loma vista? Your shit was practically steaming

[D.B.S]

I know this is a far stretch, but could the intake have played a role (minor role) in the difference in numbers? The temps could definitely made a difference, but what about the intake?

I know it's a lot to ask, but why not try going back to the stock box and re-dyno...

[madmanhiker]

my dyno(s) were definitely affected by the high heat, and horrible fan...I only put up 307 rwhp and 327 tq... was expecting more as well...

the heat will kill the n55 (period)... but ur numbers definitely seem low. My friend who has a completely stock 135 (6MT) put up 290 hp/tq bone stock on the same dyno same day...

[BMWfan07]

Originally Posted by nkadisha

I also notice the slower feeling while in the hot, but our engines don't seem to have nearly as big as a cooling problem than the N54s..I have a few friends with the n54 and every time we run together their temperatures get crazy high while mine stays normal. The N55 cools rather quick at the track too.

Yes, my N54 ran hotter engine temperatures, especially during spirited driving, my N55 now runs much cooler, I have never seen this car run hot. Whenever I had that n54 in the garage with the engine running, it put out a lot of heat, garage turned into a sauna, that twin turbo was a hot engine in general, it went through a quart of oil about every 5000 miles, I have 10000 on the N55, it has not needed 1 quart added, I think that is because it runs cooler than the N54.

However, I was speaking to the ambient temperature's affect on the engine. I just did not notice much difference in power on a hotter day with the N54, but with my N55 the power decrease on a hot day is much more pronunced.

[JRubin13]

Originally Posted by nkadisha

Remember that day up loma vista? Your shit was practically steaming

ehhhh, it was having a bad day......i think i busted another hpfp

[FrankiE90]

parky1215 - all the dct that were dyno on this thread have done so in 5th gear.
the gains between the curve on ur dyno looks very good.
if anything that's ur indication for power. Is it maximized with all ur bolt ons -
that's another story.

I'm sure if u dyno'd on a differnt machine - dynojet, u'll see higher numbers.


on a side note - i've yet to see any tuner dyno on a 6mt or reg 6AT
and get numbers similar to DCT being pulled on 5th gear.
guys we're going have to accept that the N55 is not a dyno queen -
stated before, look between the curve for ur power gains.

[madmanhiker]

Originally Posted by FrankiE90

guys we're going have to accept that the N55 is not a dyno queen -stated before, look between the curve for ur power gains.

there is truth to this statement...

[CPWINCH]

you are boosting 14psi, i only boost 10-11 with the proceed. Do you have you dme updated?

[D.B.S]

Originally Posted by CPWINCH

Do you have you dme updated?

What does this have to do with anything? He's running a Flash, a flash is a rewrite of the coding in the ECU, so it doesn't matter what version he has, because it's not all stock coding...

[CPWINCH]

Originally Posted by Army335xi

What does this have to do with anything? He's running a Flash, a flash is a rewrite of the coding in the ECU, so it doesn't matter what version he has, because it's not all stock coding...

thanks for the help, no need to be a douchbag

[parky1215]

quick update: I am seeing shadow code on my car after the tune (0x36BE, DME not encoded) and still getting downpipe inefficient cat code (0x3106). I notified Jeremy about these.
He told me that he will add those to his tune so that it does not appear anymore.
I will need to bring my car again for reflash ~

Here comes another trip to LA. Oh well, I need some good driving to break-in my hankook R-S3 anyway

[nkadisha]

Originally Posted by parky1215

quick update: I am seeing shadow code on my car after the tune (0x36BE, DME not encoded) and still getting downpipe inefficient cat code (0x3106). I notified Jeremy about these.
He told me that he will add those to his tune so that it does not appear anymore.
I will need to bring my car again for reflash ~

Here comes another trip to LA. Oh well, I need some good driving to break-in my hankook R-S3 anyway

I also still had the downpipe code come back recently, I'm going back in soon too