|
|
SUPPORT ZPOST BY DOING YOUR TIRERACK SHOPPING FROM THIS BANNER, THANKS! |
Post Reply |
|
Thread Tools | Search this Thread |
03-08-2011, 06:04 PM | #1 |
Enlisted Member
7
Rep 39
Posts |
What makes the M3 S54 Engine
Power Output (bhp/rpm) M3 / M roadster - M coupe 333 / 315 bhp @ 7900 rpm
Does anyone know why the M3 makes 333 compared to the M coupe w/ 315 |
03-08-2011, 08:28 PM | #4 |
Lieutenant Colonel
92
Rep 1,603
Posts
Drives: Imola Red Z4MC
Join Date: Apr 2010
Location: Ontario, Can
|
Yup Z4M is 330 and i believe the Euro Z4Ms have 343?
__________________
///M - Some Mods 'N Stuff
|
Appreciate
0
|
03-08-2011, 08:48 PM | #5 |
Custom User Title
141
Rep 661
Posts |
As for why:
definitely different (less restrictive) headers definitely different fuel (94 octane is common vs our 91) possibly different cats possibly different ECU programming - and perhaps something else I missed |
Appreciate
0
|
03-09-2011, 01:51 AM | #7 |
Colonel
60
Rep 2,128
Posts |
As said - the Z3MC numbers you quote are due to restrictive exhaust and a lower redline. The US Z4MC is 3hp lower than the US E46 M3 due to the exhaust. The Euro Z4MC has the same hp as the Euro E46M3 thanks to its headers and cats.
|
Appreciate
0
|
03-09-2011, 09:34 AM | #9 |
Brigadier General
218
Rep 4,726
Posts |
It's only quoted that way for some reason, the usa z4m makes a good 10hp more then the us m3s do.
__________________
|
Appreciate
0
|
03-09-2011, 09:45 AM | #10 |
Z4MC Sapphire Black
45
Rep 177
Posts |
Mine is a European Spec Z4M running on 98 oct.
__________________
|
Appreciate
0
|
03-09-2011, 09:47 AM | #11 |
Z4MC Sapphire Black
45
Rep 177
Posts |
And this dyno has taken E46 M3s before but running anywhere from 330 to 340+ bhp...
The tuner was surprised that my engine was doing 363 but if you look it up on wikipedia, the engine ratings are a lot better for the Z4Ms. http://en.wikipedia.org/wiki/BMW_S54B32
__________________
|
Appreciate
0
|
03-09-2011, 02:39 PM | #13 | |
Midlife Crises Racing Silent but Deadly Class
1821
Rep 5,337
Posts
Drives: 2006 MZ4C, 2021 Tesla Model 3
Join Date: Oct 2007
Location: Welcome to Jamaica have a nice day
|
Quote:
You people are mixing different HP ratings and numbers together to get all sort of different "magical" difference between the engines. I don't know how many times this needs to be brought up, but DIN and SAE measurements result in different numbers. DIN is what the Europeans use and SAE standards are 'Mercan (Society of American Engineers). SAE HP numbers are typically a few percentage points lower. The magical 343 HP some of you keep insisting that the "European" trim makes is a DIN measurement. Converting that 343 HP to SAE (1 SAE HP = 1.0139 DIN HP) yields 338 HP, which is 5 more HP than U.S. spec E46 M3 and 8 more HP than U.S. spec MZ4, the main difference being where the CATs are placed on European trim cars vs. US trim cars.
__________________
Sitting on a beat-up office chair in front of a 5 year old computer in a basement floor, sipping on stale coffee watching a bunch of meaningless numbers scrolling aimlessly on a dimly lit 19” monitor.
|
|
Appreciate
0
|
03-09-2011, 04:18 PM | #14 |
International Bar Hopper
25
Rep 350
Posts
Drives: 2006 Imola Red Z4 M Roadster
Join Date: Sep 2009
Location: Incline Village, Lake Tahoe
|
Correct^
Euro E46 M3 is 343PS (Deutsches Institute fur Normung..DIN) =338HP or 252KW and 269 lb-ft torque. Makes more power than U.S E46 M3 because location of cats is in the secondary pipes as opposed to U.S being in the headers. U.S E46 M3 is 338PS(DIN) = 333HP or 248KW and 262 lb-ft torque. The Z4M makes 330HP and that is 3 less than the U.S E46 M3 because of an extra set of cats in the secondary pipe But!! the Z4 M is lighter by almost 200lbs and so therefore quicker Sooo.. the moral of the story is: Go buy some Supersprint V2 Step headers cheers EDIT: I edited this post because I was corrected by O-cha about location and number of cats. Thanks O-cha
__________________
2006 Imola Red Z4 M, ESS VT2-500 Supercharged, SS V2 step headers, AEM water/meth, Nitto NT555R Drag Radials, ESS VT3 coming
Last edited by fr8tdog; 03-09-2011 at 05:57 PM.. |
Appreciate
0
|
03-09-2011, 04:32 PM | #15 | |
Brigadier General
218
Rep 4,726
Posts |
Quote:
Regardless, once again, of the ratings, the z4m Makes 10hp more then the m3 consistently.
__________________
|
|
Appreciate
0
|
03-09-2011, 04:40 PM | #16 | |
International Bar Hopper
25
Rep 350
Posts
Drives: 2006 Imola Red Z4 M Roadster
Join Date: Sep 2009
Location: Incline Village, Lake Tahoe
|
Quote:
EDIT: or is it maybe in the exhaust somewhere... as in the Z4 M is less raspy, so maybe some restriction there
__________________
2006 Imola Red Z4 M, ESS VT2-500 Supercharged, SS V2 step headers, AEM water/meth, Nitto NT555R Drag Radials, ESS VT3 coming
Last edited by fr8tdog; 03-09-2011 at 04:55 PM.. |
|
Appreciate
0
|
03-09-2011, 04:51 PM | #17 |
Colonel
187
Rep 2,138
Posts
Drives: Me
Join Date: Oct 2007
Location: Virginia Beach
|
|
Appreciate
0
|
03-09-2011, 05:01 PM | #18 | |
Brigadier General
218
Rep 4,726
Posts |
Quote:
The z4m have a second set of cats in addition, but they are in the secondary pipes where they make minimal difference, especially when the breathing is already effected by the primaries a sort of there's a sort of backwards diminished return.
__________________
|
|
Appreciate
0
|
03-09-2011, 05:08 PM | #19 | |
deft danish devil
5
Rep 114
Posts
Drives: BSM E86 M-Cp, LMB 335d M-Sport
Join Date: Apr 2009
Location: Fredericksburg, VA
|
Quote:
|
|
Appreciate
0
|
03-09-2011, 05:33 PM | #20 | |
International Bar Hopper
25
Rep 350
Posts
Drives: 2006 Imola Red Z4 M Roadster
Join Date: Sep 2009
Location: Incline Village, Lake Tahoe
|
Quote:
Thanks for clearing that up I new the Euro had one set of cats and Z4 M had two. I actually read about the U.S E46 M3 having a second set of cats from Wikipe... of course their not always correct either. Thanks for clearing up the confusion, especially location of cats. Cheers By the way... will I have any issues installing SS V2 step headers onto my OEM sect1 pipe as far as codes or emissions testing? Will the OEM section 1 cats be sufficient? Thanks
__________________
2006 Imola Red Z4 M, ESS VT2-500 Supercharged, SS V2 step headers, AEM water/meth, Nitto NT555R Drag Radials, ESS VT3 coming
Last edited by fr8tdog; 03-09-2011 at 06:01 PM.. |
|
Appreciate
0
|
03-09-2011, 06:34 PM | #21 |
Brigadier General
218
Rep 4,726
Posts |
Yes codes, unknown on emissions, depends on testing stringency.
__________________
|
Appreciate
0
|
03-09-2011, 08:55 PM | #22 |
Colonel
479
Rep 2,782
Posts
Drives: ESS/G-Power Z4M, VF Z4, 996tt
Join Date: Sep 2009
Location: Los Angeles
|
Codes if you don't relocate your O2 sensors to post-secondary cats. I don't know for certain that you won't get codes with the O2 sensors relocated, but I haven't read of a Z4M that has relocated its O2 sensors and still gets a code.
__________________
|
Appreciate
0
|
Post Reply |
Bookmarks |
|
|