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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > e90 Steptronic Dyno Results: STOCK vs. SSTT/K&N



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      02-18-2008, 05:34 PM   #1
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e90 Steptronic Dyno Results: STOCK vs. SSTT/K&N

I was asked to start another thread so that all the results could be captured on one thread. As the title implies, I set out to see exactly how much power one would get in the real world with the SSTT/K&N combination. There were no dyno tricks, no gimmicks, no octane booster, nothing but straight off the street and onto the dyno.

Gas: 93 octane from Chevron
Temperature: approximately 55 degrees on both days
Humidity: similar on both days
Barometric Pressure: similar on both days
Dyno: same on both days

Without further delay:

Stock vs. SSTT/K&N STD Correction:


Stock vs. SSTT/K&N Actual with no Correction:


Stock vs. SSTT/K&N SAE Correction:


Thanks to Jon at the MShop for the great service on the SSTT and thanks to a random ebayer for the K&N drop-in filter!

Peter
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      02-18-2008, 05:41 PM   #2
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Hey Peter,
Good to see another bmw guy in houston. Just wanted to give you a heads up. Use shell 93 over chevron. You will see even more power. We have done multiple dynos showing it.

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      02-18-2008, 05:49 PM   #3
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Quote:
Originally Posted by PresaMat View Post
Hey Peter,
Good to see another bmw guy in houston. Just wanted to give you a heads up. Use shell 93 over chevron. You will see even more power. We have done multiple dynos showing it.

Mat
Peter has a strong car, as I figured that I would have had him beat by 2-3 hp with him having only 1100mi. and me right at 5k. Outside of the BMC vs. K&N filter, the only difference between our two cars was the color and the gas. I ran mine with Shell 93, he ran with Chevron 93.

For those who missed it in Peter's original thread, I also tested mine today. Of the three runs, my combined best was as follows:

STD Correction:
312.9 rwhp
332.2 rwtq

Actual - No Correction:
321.1 rwhp
340.7 rwtq

Here is a graph of my best HP run, although I ran the higher torque reading on another.

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      02-18-2008, 05:54 PM   #4
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Quote:
Originally Posted by PresaMat View Post
Hey Peter,
Good to see another bmw guy in houston. Just wanted to give you a heads up. Use shell 93 over chevron. You will see even more power. We have done multiple dynos showing it.

Mat
He is using chevron 93!!
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      02-18-2008, 06:19 PM   #5
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exactly, he told him to use Shell instead
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      02-18-2008, 06:23 PM   #6
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Good work guys. Congrats!
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      02-18-2008, 09:05 PM   #7
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Hmmmmm, ok, I will use Shell as I know it's great gas. I filled up on Chevron just so that I would have consistent gas from stock to modded. I didn't want to do anything different than when I dyno'ed stock so as to keep as many variables the same as possible.

Reggie - again bud, it was VERY nice meeting you and your daughter! You seem like a great guy and I hope you make it to TX2K8! Your car is BEAUTIFUL and I hope to see it again!

Peter
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      02-18-2008, 09:52 PM   #8
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Quote:
Originally Posted by houstonT View Post

Reggie - again bud, it was VERY nice meeting you and your daughter! You seem like a great guy and I hope you make it to TX2K8! Your car is BEAUTIFUL and I hope to see it again!

Peter
The feeling is mutual. Gotta love that badass-look Silver/Black 335i of yours, not to mention when you get the 19's put on!

My cousin and I will likely be at the TX2K8 for the Sat-Sun events. Looks like it is going to be a blast!
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      02-18-2008, 10:27 PM   #9
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Reggie - sounds good bud, I look fwd to meeting your cousin as well!

brisk - if you look at the dates on the dyno runs, you can see that I dyno'ed stock on 2/13. I put the SSTT on the car that night and drove approximately 200 miles in that timeframe. I was told to allow the car to adapt before dyno'ing it.

Peter
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      02-18-2008, 11:26 PM   #10
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good numbers!
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      02-19-2008, 03:12 PM   #11
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      02-19-2008, 08:39 PM   #12
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Quote:
Originally Posted by houstonT View Post
I was asked to start another thread so that all the results could be captured on one thread. As the title implies, I set out to see exactly how much power one would get in the real world with the SSTT/K&N combination. There were no dyno tricks, no gimmicks, no octane booster, nothing but straight off the street and onto the dyno.

Gas: 93 octane from Chevron
Temperature: approximately 55 degrees on both days
Humidity: similar on both days
Barometric Pressure: similar on both days
Dyno: same on both days

Without further delay:

Stock vs. SSTT/K&N STD Correction:


Stock vs. SSTT/K&N Actual with no Correction:


Stock vs. SSTT/K&N SAE Correction:


Thanks to Jon at the MShop for the great service on the SSTT and thanks to a random ebayer for the K&N drop-in filter!

Peter

Grest source of info, thank you.

The SSTT w/K&N filter provides (in all three corrections):
  • +49HP/+52TQ
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      02-19-2008, 08:44 PM   #13
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Quote:
Originally Posted by RMcoolX View Post
Peter has a strong car, as I figured that I would have had him beat by 2-3 hp with him having only 1100mi. and me right at 5k. Outside of the BMC vs. K&N filter, the only difference between our two cars was the color and the gas. I ran mine with Shell 93, he ran with Chevron 93.

For those who missed it in Peter's original thread, I also tested mine today. Of the three runs, my combined best was as follows:

STD Correction:
312.9 rwhp
332.2 rwtq

Actual - No Correction:
321.1 rwhp
340.7 rwtq

Here is a graph of my best HP run, although I ran the higher torque reading on another.

Dyno looks goos, but incomplete. What was your base dyno numbers/chart please.
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      02-19-2008, 09:13 PM   #14
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Quote:
Originally Posted by Numb3rs View Post
Dyno looks goos, but incomplete. What was your base dyno numbers/chart please.
I don't have one. Had I done one, however, it would have likely looked very similar to what you see here from Peter.
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      02-19-2008, 09:22 PM   #15
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Numb - yes, that's right, my goal during this WHOLE process to see what the REAL WORLD gain was with the SSTT/K&N all things being equal (ok, as many things being equal as I could control)......and I think I accomplished that.

As for Reggie's numbers, it's safe to assume that our cars are almost identically matched. I'm sure his stock numbers were similar to mine.

Peter
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      02-20-2008, 09:15 AM   #16
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Thanks Brisk! That was the intent all along... No crazy cf, no differences in gas, no "tricks".

I think the only other "interesting" thing I could do would be to put a 50/50 mix of 93/104 gas. I wonder if the car would pick up any power on some race gas? I suppose it depends on if the ECU is pulling timing for any reason on the pump (which I doubt).

Thoughts?

Peter
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      02-20-2008, 09:32 AM   #17
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How much of this was the K&N and how much the SSTT?
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      02-20-2008, 10:31 AM   #18
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i think most tunes and turbo cars gain power and HP with higher octane gas.
the PROcede's car gains some nice HP and TQ gains from some high octane mixes. im sure with that mix u can def gain a nice bump up
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      02-20-2008, 10:58 AM   #19
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ucla - I do not know...I fit in dyno time during "early lunch hour" from work and I didn't have time to swap filters during the dyno process. I would attribute 45 or so rwhp to the SSTT and the rest to the K&N, although I have no empirical evidence to support this.

5sokol - I think the other tuners cars pick up good power on race gas b/c they can either run a less conservative tune (due to the higher octane) or they simply run a bit more boost. The SSTT is fixed in terms of what it can and can't do and therefore I'm not sure I would pick anything up unless the ECU is pulling some timing.

Anyone out there dyno pump vs. race on the SSTT? If not, looks like I might have another "dyno project" on my hands!

Peter
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      02-20-2008, 11:05 AM   #20
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yea im not sure or too techy, but even on a stock car 91 to 93 u can a nice bump in power

here is a members dyno, not sure he let it adapt on the octane but he states:
"I then go put in a half tank of 100 octane (had a 1/4 tank of 91)... "

http://www.e90post.com/forums/showthread.php?t=105418
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      02-20-2008, 01:59 PM   #21
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He made 322 SAE rwhp, or about 17 more than I made SAE. I'm not sure if the difference is in the gas OR if it's in the notorious Arizona HIGH correction factor. I BET YOU ANYTHING his actual numbers were in the 300 range and that his correction factor was above 1.00

Peter

Quote:
Originally Posted by 5sokol335icoupe View Post
yea im not sure or too techy, but even on a stock car 91 to 93 u can a nice bump in power

here is a members dyno, not sure he let it adapt on the octane but he states:
"I then go put in a half tank of 100 octane (had a 1/4 tank of 91)... "

http://www.e90post.com/forums/showthread.php?t=105418
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      02-21-2008, 12:04 AM   #22
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Great numbers! Congrats!!
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