Dyno of the Long Term 2012 BMW 328i comes in at 241hp / 275lb-ft of torque

by Mark Jurista on February 20, 2012, 2:47 pm

The dyno numbers are in from the morning testing at Turner Motorsport and the numbers are almost too good to believe. The long term review 328i reported in at 241.241 horsepower and 274.759 lb-ft of torque. Considering the car is rated at 240 horsepower and 255 lb-ft of torque by BMW at the crank, these numbers at the wheels are just really impressive.

2012 BMW 328i Dyno Run

Before today, two 2012 F30 328i sedans have been dynod, our friends at EAS (EAS F30 328i dyno thread) put down 226hp and 230ft-lbs of torque. InsideLine (InsideLine F30 328i dyno thread) put down an even more impressive 240hp and 257ft-lbs of torque. Clearly BMW is under rating the N20 4 cylinder turbo in these cars.

2012 BMW 328i N20 Motor

This was the first time anyone has dynoed the N20 328i with a 6 speed manual and I think anyone would be happy with these results. A big thank goes out to Turner Motorsport for helping us make this happen!

Besides the dyno run we're using Turner Motorsport impressive facility to dive into our F30 328i. Look for the following technical results from our trip -

Complete suspension review including expert analysis from TMS suspension engineers
Side-by-Side comparison of the E90 to the F30 on the lift
We weigh the 328i on the TMS race scales. How much does an F30 328i really weigh?
Wheel fitment testing - If you're going to be putting rims on your F30 you'll need this info
Brake pad fitment - Are any existing brake pads compatible with our F30 328i brake system
And more! Who knows what else we'll come up with with the BMW experts at Turner Motorsports!

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26 responses to Dyno of the Long Term 2012 BMW 328i comes in at 241hp / 275lb-ft of torque

justinnum1 commented:
February 20, 2012, 2:51 pm

cool!

pix335i commented:
February 22, 2012, 4:02 pm

The time has been moved up to 10:00 AM tomorrow. The LIVE stream will be at:

http://www.turnermotorsport.com/live-stream.aspx

justinnum1 commented:
February 22, 2012, 4:52 pm

Damn, im gonna be at the dealer getting some service done(slight vibration in steering wheel)...might have to bring my laptop and watch there...or can i replay it somehow?

pix335i commented:
February 22, 2012, 4:54 pm

We will have the video up on our Youtube channel at some point. Make sure you are subscribed for updates:
http://www.youtube.com/user/BimmerfestVideos/featured

SD Z4MR commented:
February 22, 2012, 6:12 pm

Quote:

Originally Posted by pix335i

The time has been moved up to 10:00 AM tomorrow. The LIVE stream will be at:

http://www.turnermotorsport.com/live-stream.aspx

No love for the West Coast! I'll still be sleeping, not a morning person! I guess that I'll have to catch it on YouTube.

tim330i commented:
February 22, 2012, 6:17 pm

Quote:

Originally Posted by SD 335is

No love for the West Coast! I'll still be sleeping, not a morning person! I guess that I'll have to catch it on YouTube.

The live stream will start at 10 with setup and some test runs. Full bore runs will be at 11, can you catch that?

Tim

av98 commented:
February 22, 2012, 8:49 pm

Looking forward to the 6 SPD MT numbers plus the rest of the TMS feedback.

pix335i commented:
February 23, 2012, 8:54 am

The car has arrived at Turner Motorsport and is getting prepped for the big day! Here are the first couple pictures.

F30 328i at TMS

justinnum1 commented:
February 23, 2012, 9:17 am

cool

pix335i commented:
February 23, 2012, 9:36 am

Dyno packs going on the car. Stream is already up and live at:
http://www.turnermotorsport.com/live-stream.aspx

F30 Dyno Setup

Carlos Thomas commented:
February 23, 2012, 10:04 am

Need better upload bandwidth to get a better quality broadcast. However, it is great to be watching this while I am working. GOOD JOB!!

pix335i commented:
February 23, 2012, 10:58 am

Dyno numbers officially came in at a max of 241.241 horsepower and 274.759 lb-ft of torque. Those are some INSANE numbers for a car rated at 240hp and 255lb-ft!

Carlos Thomas commented:
February 23, 2012, 11:02 am

Quote:

Originally Posted by pix335i

Dyno numbers officially came in at a max of 241.241 horsepower and 274.759 lb-ft of torque. Those are some INSANE numbers for a car rated at 240hp and 255lb-ft!

Being that I am not an engineer, explain to me why that is "insane".

pix335i commented:
February 23, 2012, 11:05 am

There are two ways to rate HP / Torque. I found an explanation online that probably explains it better than I can.

Quote:

Crank power is measured with an engine connected to a dynamometer and tested (with out the rest of the car attached, just the engine by its self). wheel HP is measured with a chassis dynamometer, and is measured with the car on a rolling road type of machine. wheel HP is typically lower because the engine has to use some of its power to spin the transmission and wheels (among other things). there are rough estimates for drivetrain loss for front wheel, all wheel, and rear wheel drive vehicles. those estimates are used so people can compare the power their car is making at the wheels to the power the car was rated at the factory (from the crank).

So, the fact that the car is making more HP / TQ at the wheels than what BMW advertises at the crank is what makes it insane.

pix335i commented:
February 23, 2012, 11:08 am

Here are two quick screen captures from the dyno runs

F30 328i Dyno Run

justinnum1 commented:
February 23, 2012, 11:10 am

Quote:

Originally Posted by Carlos Thomas

Being that I am not an engineer, explain to me why that is "insane".

Im no engineer either, but based on those numbers HIS n20 is putting out close to 270 horses and 300lb foot toruqe

av98 commented:
February 23, 2012, 11:27 am

Quote:

Originally Posted by pix335i

Here are two quick screen captures from the dyno runs

F30 328i Dyno Run

Wow that's impressive! Great HP & torque numbers.

For reference here's a good link about the N20 that matches close to your dyno powerband curves

http://www.bimmerboost.com/showthrea...N52-comparison

BMW did a great job to transition the torque drop off at 5k rpm into the HPs sweet spot around the same rpm.

Did you have the A/F ratio map?

Carlos Thomas commented:
February 23, 2012, 11:27 am

Quote:

Originally Posted by justinnum1

Im no engineer either, but based on those numbers HIS n20 is putting out close to 270 horses and 300lb foot toruqe

johnc_22 commented:
February 23, 2012, 11:29 am

That's pretty incredible. Definitely underrated.

m8o commented:
February 23, 2012, 11:30 am

I had trouble believing the previous two tests cited in the OP. But this clinches it! Fan-frig'n-tastic.

matts335 commented:
February 23, 2012, 12:15 pm

I'd probably still want the 335, but that's pretty cool. What's with the initial dip somewhere between 1500-2000 rpms in the torque curve?

pix335i commented:
February 23, 2012, 1:40 pm

The dip is from the way the dyno loads the engine. It freewheels at first then clamps down to load the engine.

tim330i commented:
February 23, 2012, 9:10 pm

http://www.youtube.com/watch?v=cS2nj...ature=youtu.be

I quickly put together a video of a few runs from today. We did a total of 12 runs on the dyno and despite the turbo getting "rather warm" (as shown in the video) the oil temp hardly moved and there was no coolant temp warnings. Watch and let me know what you think!

justinnum1 commented:
February 23, 2012, 10:25 pm

weird...why no real wheels on the car?

tim330i commented:
February 23, 2012, 10:29 pm

Quote:

Originally Posted by justinnum1

weird...why no real wheels on the car?

Dynapack bolts to the rear hubs in place of the wheels with an adapter -

F30 Dyno Setup

Once the adapter is bolted in place the dyno unit is connected and the car weight rests on the units -

F30 Dyno Setup