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M2 Technical Topics > S55 Engine / Drivetrain / Exhaust / Bolt-ons / Tuning > M2C, OG M2, M3/4 Power Curve Comparison on Dyno

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      04-10-2019, 11:27 PM   #23
buckybadger
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M2C any day. Drove both but prefer S55 even in stock form.
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      04-12-2019, 10:13 AM   #24
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Quote:
Originally Posted by Don Pauleone View Post
I think 404 is bhp (british horse power) and 409 is mechanical horse power..... u feel me
BHPnrefers to brake horse power just FYI. BSHP or brake specific horse power is the most accurate way to measure power when calculating things like fueling requirements and VE Volumetric Efficiency...
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      04-12-2019, 11:33 AM   #25
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Quote:
Originally Posted by motex View Post
Brake horsepower (bhp) is the measure of an engine's horsepower before the loss in power caused by the gearbox, alternator, differential, water pump, and other auxiliary components such as power steering pump, muffled exhaust system, etc
This basically describes SAE gross HP used long ago.

Today, auto manufacturers advertise SAE net HP...

“When achieving a net-horsepower number, the engine must be tested in as-installed condition, utilizing factory-specific ignition timing, fuel delivery, exhaust (including manifolds and mufflers), and other accessories like the alternator and water pump. In short, this delivers a closer approximation of how much power an engine produces as installed in the car.”

This SAE net HP figure becomes wheel HP after considering the transmission, driveline, differential efficiency losses.

“The net rating system was used until 2005, when the SAE issued standard J2723. This standard clarifies the existing methodology, but also requires an independent observer be present when the testing is done.”
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      04-12-2019, 04:00 PM   #26
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Also worth noting there is a mechanical (imperial) HP and metric HP. This is why the US rating is less than other regions. 405 HP vs 410 HP.

Apparently American horses are a little bigger.
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      04-12-2019, 09:59 PM   #27
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Originally Posted by SickM2C View Post
Forgive me if this is a stupid question, and not the right forum to ask.

I recently had my break-in service done on my 2019 M2 competition, and now would like to have the BM3 Stage 2 tune. Can someone please educate me on the process.

For example, besides purchasing the BM3 license. What else would I need to purchase, or install in order to run Stage 2 BM3.

If this is not the right forum for this question, can someone please direct me to the correct forum.

Thank you for your time, and have a great day!
Yea, I don't think you should go from stock to stage 2.

This is what I'm doing...

- CS map (until I get used to it)
- then CS+ (until I get used to it)
- and finally stage 1

All 3 of these can be run with stock components.

Stage 2 requires a few upgrades such as...downpipes and maybe intercooler?
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      04-13-2019, 03:08 PM   #28
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i have to say that i have never driven a tuned m2 competition but we tuned a lot of m4 and i believe that it is the perfect car to die. Of course skilled drivel could enjoy every single slide out of it but the average one...damn, they became to angry in stage 1 never mind the stage 2.

FYI for the stage 2 intercooler is mandatory because they tend to overheat a lot.
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      04-14-2019, 12:18 AM   #29
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Quote:
Originally Posted by nomoracin View Post
Quote:
Originally Posted by SickM2C View Post
Forgive me if this is a stupid question, and not the right forum to ask.

I recently had my break-in service done on my 2019 M2 competition, and now would like to have the BM3 Stage 2 tune. Can someone please educate me on the process.

For example, besides purchasing the BM3 license. What else would I need to purchase, or install in order to run Stage 2 BM3.

If this is not the right forum for this question, can someone please direct me to the correct forum.

Thank you for your time, and have a great day!
Yea, I don't think you should go from stock to stage 2.

This is what I'm doing...

- CS map (until I get used to it)
- then CS+ (until I get used to it)
- and finally stage 1

All 3 of these can be run with stock components.

Stage 2 requires a few upgrades such as...downpipes and maybe intercooler?
Quote:
Originally Posted by nomoracin View Post
Quote:
Originally Posted by SickM2C View Post
Forgive me if this is a stupid question, and not the right forum to ask.

I recently had my break-in service done on my 2019 M2 competition, and now would like to have the BM3 Stage 2 tune. Can someone please educate me on the process.

For example, besides purchasing the BM3 license. What else would I need to purchase, or install in order to run Stage 2 BM3.

If this is not the right forum for this question, can someone please direct me to the correct forum.

Thank you for your time, and have a great day!
Yea, I don't think you should go from stock to stage 2.

This is what I'm doing...

- CS map (until I get used to it)
- then CS+ (until I get used to it)
- and finally stage 1

All 3 of these can be run with stock components.

Stage 2 requires a few upgrades such as...downpipes and maybe intercooler?
Thank you!
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