BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read
M2 Technical Topics > S55 Engine / Drivetrain / Exhaust / Bolt-ons / Tuning > ▀▄ eas | MY19 M2 Competition Dynojet results! (whp) (Sep 2018)

Post Reply
 
Thread Tools Search this Thread
      10-05-2018, 06:29 AM   #111
trey100
Colonel
trey100's Avatar
United_States
1125
Rep
2,564
Posts

Drives: 2020 M2 Competition
Join Date: Jul 2007
Location: New York

iTrader: (0)

Quote:
Originally Posted by Karmic Man View Post
Quote:
Originally Posted by trey100 View Post
Am I the only one that's disappointed in this? I assumed that the M2C would be much closer in power to the F80/2 since their ratings are closer on paper.
You are taking chassis dyno readings as an absolute. They are not engine dyno and should not be taken as such.

Different day, different chassis, different set of wheels and tires all play as variables.

One of my ex car had a 40hp at the wheels advantage to my friend’s car (same as mine) but turns out that we accelerated at the same rate and end up at the same speed upto 200km/h...

The quarter mile trap speed is a much better indicator to gauge engine power delta between different cars, not chassis dyno.
I am comparing the 2 whp dynos and at certain RPMs especially up high the difference is close to 50 whp. That's very telling in the real world.

Yes different day different results but 50 whp is a huge difference. We are not talking small variations.
Appreciate 0
      10-05-2018, 09:23 AM   #112
Karmic Man
Lieutenant Colonel
Karmic Man's Avatar
Australia
1996
Rep
1,759
Posts

Drives: M2C
Join Date: Aug 2013
Location: World

iTrader: (0)

Quote:
Originally Posted by trey100 View Post
I am comparing the 2 whp dynos and at certain RPMs especially up high the difference is close to 50 whp. That's very telling in the real world.

Yes different day different results but 50 whp is a huge difference. We are not talking small variations.
If the difference is 50whp don't you think there is something not right about it? The advertised flywheel power delta is only 20hp (405hp vs 425hp)

It comes back to what I said previously don't take the numbers as absolute.

When more M2Cs run on the dyno with 93 the picture will become clearer.

I would also like to see a boost curve chart between the M2C and the M4 as well if there is one.
Appreciate 0
      10-05-2018, 04:26 PM   #113
M-Pilot
Brigadier General
M-Pilot's Avatar
United_States
4859
Rep
3,659
Posts

Drives: 981 Cayman GTS
Join Date: Mar 2015
Location: CA

iTrader: (0)

Garage List
Quote:
Originally Posted by GreatWhiteM2 View Post
On the 17th Oct we are running my M2C and a M4 on the same dyno.

Both stock, 98ron cars. EU spec.
It'd be great if you could throw an OG M2 in there too
Appreciate 1
M2C_PLUS1774.00
      10-05-2018, 05:42 PM   #114
trey100
Colonel
trey100's Avatar
United_States
1125
Rep
2,564
Posts

Drives: 2020 M2 Competition
Join Date: Jul 2007
Location: New York

iTrader: (0)

Quote:
Originally Posted by Karmic Man View Post
Quote:
Originally Posted by trey100 View Post
I am comparing the 2 whp dynos and at certain RPMs especially up high the difference is close to 50 whp. That's very telling in the real world.

Yes different day different results but 50 whp is a huge difference. We are not talking small variations.
If the difference is 50whp don't you think there is something not right about it? The advertised flywheel power delta is only 20hp (405hp vs 425hp)

It comes back to what I said previously don't take the numbers as absolute.

When more M2Cs run on the dyno with 93 the picture will become clearer.

I would also like to see a boost curve chart between the M2C and the M4 as well if there is one.
Well of course I think it's strange but then again BMW over-rated the S55 in the M3/4 so they can legitimately calls it 25 less HP yet it still meet that advertisement.

Anyway hopefully it's just an anomaly.
Appreciate 0
      10-05-2018, 06:07 PM   #115
GoneIn4Secs
Banned
1286
Rep
1,675
Posts

Drives: BSM F87 LCI (DCT)
Join Date: Jun 2018
Location: GTA

iTrader: (0)

Quote:
Originally Posted by trey100 View Post
Well of course I think it's strange but then again BMW over-rated the S55 in the M3/4 so they can legitimately calls it 25 less HP yet it still meet that advertisement.

Anyway hopefully it's just an anomaly.
U mean underrated ,

If it makes more power than advetised, its underrated

Last edited by GoneIn4Secs; 10-05-2018 at 07:46 PM.. Reason: Damn autocorrect!
Appreciate 0
      10-05-2018, 08:35 PM   #116
trey100
Colonel
trey100's Avatar
United_States
1125
Rep
2,564
Posts

Drives: 2020 M2 Competition
Join Date: Jul 2007
Location: New York

iTrader: (0)

Quote:
Originally Posted by GoneIn4Secs View Post
Quote:
Originally Posted by trey100 View Post
Well of course I think it's strange but then again BMW over-rated the S55 in the M3/4 so they can legitimately calls it 25 less HP yet it still meet that advertisement.

Anyway hopefully it's just an anomaly.
U mean underrated ,

If it makes more power than advetised, its underrated
Yes thx.
Appreciate 0
      10-05-2018, 09:11 PM   #117
hellrotm
Banned
4143
Rep
6,926
Posts

Drives: F80
Join Date: Jul 2007
Location: ...Location...Location

iTrader: (0)

Quote:
Originally Posted by GreatWhiteM2 View Post
On the 17th Oct we are running my M2C and a M4 on the same dyno.

Both stock, 98ron cars. EU spec.
Looking forward to the results. Base M4 or ZCP?
Appreciate 1
M2C_PLUS1774.00
      10-08-2018, 02:28 PM   #118
CosmosMpower
Brigadier General
CosmosMpower's Avatar
2049
Rep
3,714
Posts

Drives: F87c, GT3, MK7 GTI
Join Date: Apr 2011
Location: Frisco, TX

iTrader: (1)

Quote:
Originally Posted by carl44 View Post
notice @2.5k the N55 has 75more FT LB than the S55 400ish vs 325. After 3k its all S55. explains less low end snap for the M2C.carl
I've been saying this for a while, my M2 feels more torquey from low rpm than my M3.
Appreciate 0
      10-08-2018, 07:38 PM   #119
zenmaster
Brigadier General
United_States
1575
Rep
3,888
Posts

Drives: '17 M2
Join Date: Mar 2007
Location: Atlanta

iTrader: (1)

Quote:
Originally Posted by CosmosMpower View Post
I've been saying this for a while, my M2 feels more torquey from low rpm than my M3.
It would seem that throttle response should be better on the M2 and proportionately less throttle required from a stop to get same amount of torque. So M2 should feel snappier in the city.
Appreciate 0
      10-09-2018, 05:26 AM   #120
MR.
Colonel
MR.'s Avatar
No_Country
4397
Rep
2,856
Posts

Drives: BMW M2 CSL Turbomeister
Join Date: Sep 2013
Location: Travelling / Managing / Writing

iTrader: (0)

Garage List
Quote:
Originally Posted by zenmaster View Post
It would seem that throttle response should be better on the M2 and proportionately less throttle required from a stop to get same amount of torque. So M2 should feel snappier in the city.
Agree!

MR
Appreciate 0
      10-15-2018, 09:52 AM   #121
M2C
Private First Class
Germany
39
Rep
117
Posts

Drives: BMW M140i xDrive
Join Date: Sep 2018
Location: Nürburgring

iTrader: (0)

Quote:
Originally Posted by GreatWhiteM2 View Post
On the 17th Oct we are running my M2C and a M4 on the same dyno.

Both stock, 98ron cars. EU spec.
Really excited for those runs! :-)
Appreciate 0
      10-16-2018, 03:02 AM   #122
M2C
Private First Class
Germany
39
Rep
117
Posts

Drives: BMW M140i xDrive
Join Date: Sep 2018
Location: Nürburgring

iTrader: (0)

First of all, thanks a lot "tom @ eas" for those figures! Now it's quite easy to see the differences between M2, M2C and M4.

The N55 starts a bit more agressive in the beginning, but the S55 is just amazing at higher revs. Apart from this, you can see that the progression of the M2C and the M4 is more or less the same until 4500 RPM. From there onwards, the gap between M4 and M2C starts to raise until 7000 RPM. So BMW just "detuned" the M2C a little bite above 4500 RPM to keep the distance towards its big brother.

Just one question remains for me as an European, using different units. Those HP are wheelhorsepower, right? How can I convert those figures into brakehorsepower? FT-LBS ist quite easy (0,7376 FT-LBS = 1 NM). Thanks in advance.
Appreciate 0
      10-16-2018, 03:21 AM   #123
ICantDrive4Sht
Second Lieutenant
199
Rep
244
Posts

Drives: F87 M2 Competition
Join Date: Jul 2017
Location: Finland

iTrader: (0)

Quote:
Originally Posted by M2C View Post
First of all, thanks a lot "tom @ eas" for those figures! Now it's quite easy to see the differences between M2, M2C and M4.

The N55 starts a bit more agressive in the beginning, but the S55 is just amazing at higher revs. Apart from this, you can see that the progression of the M2C and the M4 is more or less the same until 4500 RPM. From there onwards, the gap between M4 and M2C starts to raise until 7000 RPM. So BMW just "detuned" the M2C a little bite above 4500 RPM to keep the distance towards its big brother.

Just one question remains for me as an European, using different units. Those HP are wheelhorsepower, right? How can I convert those figures into brakehorsepower? FT-LBS ist quite easy (0,7376 FT-LBS = 1 NM). Thanks in advance.
Definetly doesnt seem like wheelhorsepower, but they are dynojet pulls and people in states like to talk about whp when in many cases the numbers are allmost the same for Europians and our crank hp. And you cant convert it with 100% accuracy. It is measured in dyno after the pull.
Appreciate 0
      10-16-2018, 11:03 AM   #124
AlpsRider
Brigadier General
AlpsRider's Avatar
2858
Rep
3,840
Posts

Drives: M2 Competition, LBB, 6MT
Join Date: May 2015
Location: Earth

iTrader: (0)

Converting these power ratings is a bit dicey. I think the thing to do is to dyno a stock M2, M2C and M4 on the same dyno, on the same day, and with the same type of fuel. That way it is an apples to apples comparison. In addition, I'd really like to see the difference in the EU and US M2 Competition versions on the same dyno. That is probably not likely to happen unless a military person driving a US version M2C in Europe is willing to do the dyno comparison.
Appreciate 0
      10-16-2018, 12:22 PM   #125
akkando
Major General
akkando's Avatar
5860
Rep
6,631
Posts

Drives: 17 M2 DCT LBB,11 e90 M3 ZCP IB
Join Date: Jan 2017
Location: Bay Area

iTrader: (1)

Quote:
Originally Posted by AlpsRider View Post
Converting these power ratings is a bit dicey. I think the thing to do is to dyno a stock M2, M2C and M4 on the same dyno, on the same day, and with the same type of fuel. That way it is an apples to apples comparison. In addition, I'd really like to see the difference in the EU and US M2 Competition versions on the same dyno. That is probably not likely to happen unless a military person driving a US version M2C in Europe is willing to do the dyno comparison.
That would be really interesting to get the US and EU version on the same dyno!
Appreciate 0
      10-16-2018, 03:34 PM   #126
n55co
Private First Class
Germany
41
Rep
118
Posts

Drives: G80X BSM
Join Date: Apr 2013
Location: Germany

iTrader: (0)

Quote:
Originally Posted by GreatWhiteM2 View Post
We are on the dyno tomorrow with a stock M4 and my stock M2C tomorrow.
what dyno brand are you using?
Could you please show the powerloss measurement?
And EWG as correction factor would be asweome
Appreciate 0
      11-06-2018, 12:17 AM   #127
howard6868
New Member
Taiwan
0
Rep
6
Posts

Drives: BMW M2
Join Date: Nov 2018
Location: TAIWAN

iTrader: (0)

Exclamation strut brace

Anyone knows N55 m2 it going to fit M2c carbon strut brace??
Attached Images
 
Appreciate 0
      11-06-2018, 12:51 AM   #128
Bee Pee
Brigadier General
United Kingdom
1738
Rep
4,496
Posts

Drives: AW M2 DCT
Join Date: Jun 2010
Location: SW London

iTrader: (3)

Quote:
Originally Posted by howard6868 View Post
Anyone knows N55 m2 it going to fit M2c carbon strut brace??
Yes the CFRP brace can fit m2
__________________
Fettled M135i EB AT - gone but not forgotten:
AW M2 DCT
Appreciate 0
      11-08-2018, 12:24 PM   #129
howard6868
New Member
Taiwan
0
Rep
6
Posts

Drives: BMW M2
Join Date: Nov 2018
Location: TAIWAN

iTrader: (0)

Quote:
Originally Posted by Bee Pee View Post
Yes the CFRP brace can fit m2
what about with Eventuri air intake?
Appreciate 0
      11-08-2018, 12:28 PM   #130
Orange fever
Colonel
Orange fever's Avatar
Thailand
2349
Rep
2,828
Posts

Drives: E36M,E46M,E90M,X5M,i3,M2,i8
Join Date: Dec 2007
Location: SoCal. in the hood!!!

iTrader: (5)

No! two different intakes
Quote:
Originally Posted by howard6868 View Post
what about with Eventuri air intake?
__________________

BMW I12 i8 Frozen Yellow- H&R springs, 22" Radenergie F10 Monoblock Forged ///
F87 M2 Aw -Vorsteiner Aero Kit, VFF-107,Macht Schnell-Springs,VF-Engineering/Hex tuning Stage Two,ER DP,Stock Exhaust,Drop-In Bmc Filter,AA Intercooler,FTP Charge pipe+boost pipe/// Wish list :Mexico delivery 2024 BMW M2 (G87)
Appreciate 0
      11-08-2018, 12:45 PM   #131
howard6868
New Member
Taiwan
0
Rep
6
Posts

Drives: BMW M2
Join Date: Nov 2018
Location: TAIWAN

iTrader: (0)

Quote:
Originally Posted by Orange fever View Post
No! two different intakes
I had Eventuri air intake on my car already.
so i can not have both(Eventuri air intake and M2c carbon strut brace)?
Appreciate 0
Post Reply

Bookmarks

Tags
baseline, dyno, dynojet, eas, m2c

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 01:41 AM.




m2
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST