The differences between BMW M5 and BMW X5 M engine are straight from BMW M Night and Nürburgring by Gustav - Page 4 - BMW M5 Forum and M6 Forums
F10 M5 Discussion 2010- Discussion about the next upcoming generation M5 based on the next generation 5-series, the F10.

 18Likes
Reply
 
LinkBack Thread Tools Rate Thread Display Modes
post #31 of 68 Old 25th June 2011, 11:44 AM
e39>all
Junior Member, warming up (<31 posts)
 
Join Date: Apr 2011
Location: College Station, Tx
Posts: 15
Thanks: 5
Thanked 1 Time in 1 Post
Quote:
Originally Posted by RussianM View Post
the advertised #'s mean NOTHING. what the information Gustav provided means is that with very simple mods/tune this package is going to be VERY potent!

so dont get disappointed quite yet. BMW has never disappointed me so far and i dont see this being a first.


on a side note, looks like those turbos should be relatively simple to remove/service and possibly build better headers/bigger turbo setup for

anyone in the DFW area that ends up buying one and wants to be the first with upgraded turbos PM me

Not enough posts to pm, but I'm in the area and interested, Please elaborate here or in pm, thx
e39>all is offline  
Sponsored Links
Advertisement
 
post #32 of 68 Old 25th June 2011, 12:11 PM Thread Starter
Gustav
Administrator
 
Gustav's Avatar
 
Join Date: Mar 2000
Location: Kingdom of Sweden
Age: 39
Posts: 49,474
Blog Entries: 7
Thanks: 5,951
Thanked 3,786 Times in 2,285 Posts
Gustav is offline  
post #33 of 68 Old 25th June 2011, 12:18 PM Thread Starter
Gustav
Administrator
 
Gustav's Avatar
 
Join Date: Mar 2000
Location: Kingdom of Sweden
Age: 39
Posts: 49,474
Blog Entries: 7
Thanks: 5,951
Thanked 3,786 Times in 2,285 Posts
I can say I heard many times on M Night it is dofference between BMW HP and other HP

Quote:
Originally Posted by Roald32 View Post
I think this is the reason they say it delivers 560hp on paper.
Gustav is offline  
post #34 of 68 Old 25th June 2011, 03:21 PM
carlsturm
Member, P500 Sport, DSC On (>700)
 
Join Date: Dec 2004
Location: Michigan, USA
Posts: 786
Thanks: 44
Thanked 49 Times in 39 Posts
carlsturm is offline  
post #35 of 68 Old 25th June 2011, 06:19 PM
///Pete
Member, Sport: On DSC: On (>100 posts)
 
Join Date: Feb 2010
Location: Massachusetts
Posts: 186
Thanks: 14
Thanked 17 Times in 9 Posts
Quote:
Originally Posted by verbs View Post
They're very possibly limiting torque; it could be to preserve parts (like the tranny which may not be able to handle more than 500lb-ft. But even if they limit torque, and do so equally for both cars, I'm pretty sure the horsepower numbers should still be the same if the torque numbers are, limited or not.

The Mercedes 6.0L TT V12 has always made amazing torque. They've limited it to 738lb-ft, but unlimited it makes 888lb-ft on it's own.
Thinking about it more, I think you're correct. No idea why the numbers don't match up.
///Pete is offline  
post #36 of 68 Old 25th June 2011, 06:29 PM
verbs
Member, P400 Sport, DSC On (>550)
 
Join Date: Dec 2007
Location: Phoenix, Arizona USA
Posts: 550
Thanks: 7
Thanked 46 Times in 39 Posts
Quote:
Originally Posted by Gustav View Post
I can say I heard many times on M Night it is dofference between BMW HP and other HP
I rest my case.
verbs is offline  
post #37 of 68 Old 26th June 2011, 02:16 PM Thread Starter
Gustav
Administrator
 
Gustav's Avatar
 
Join Date: Mar 2000
Location: Kingdom of Sweden
Age: 39
Posts: 49,474
Blog Entries: 7
Thanks: 5,951
Thanked 3,786 Times in 2,285 Posts
That is what I hoe as well

Quote:
Originally Posted by carlsturm View Post
It will be a 600hp motor when we get hold of it !!!
Gustav is offline  
post #38 of 68 Old 26th June 2011, 04:55 PM
Boss330
Member, Sport: On DSC: On (>100 posts)
 
Join Date: Aug 2005
Location: Scandinavia, Europe
Posts: 126
Thanks: 6
Thanked 23 Times in 17 Posts
Just to clarify, all the numbers in my comparison are taken from the dyno charts provided by BMW in the brochures for each model. How accurate those dyno graphs are is a different matter alltogether...
Boss330 is offline  
post #39 of 68 Old 26th June 2011, 11:05 PM
Boss330
Member, Sport: On DSC: On (>100 posts)
 
Join Date: Aug 2005
Location: Scandinavia, Europe
Posts: 126
Thanks: 6
Thanked 23 Times in 17 Posts
The M5's exhaust manifold is basically a 180 degree header design. This was used on the Ford GT 40 (without turbos obviously) and got the nickname "bundle of snakes" exhaust due to the exhaust tubes criss crossing from bank to bank.

The idea was to get the bost of both worlds from the two different crankshaft profiles available to a V8 engine - 90degree (cross plane) and 180 degree (flat plane). Allmost every road car V8 engine has a 90 degree crank whereas the racing and Ferrari V8's are 180 degree. As most of you have noticed there is a big difference in the sound a V8 with a 180 degree crankshaft makes compared to the regular V8 burble of the 90 degree crank V8. That has to do with the difference in firing sequence between the two concepts.

The 180 degree header desig gives improved low and mid range torque as well as a sound much more similar to a flat plane V8 race engine. That's why the M5 sounds so different to the X5/6M I guess.





Burns Stainless LLC - Bundles of Snakes and 180 Degree Headers

Quote:
Most modern V-8s have what is known as 90-degree cranks (aka crucified cranks, bent cranks, cross-plane cranks) wherein the cylinder firing order is such that two cylinders on each bank fire consecutively as opposed to alternating banks. The purpose of the 90-degree crank is to minimize vibrations inherent to “flat-plane” cranks. Some racing and high performance engines including Ferraris use a flat-plane crank to optimize the intake and exhaust processes, accepting the additional vibrations. The problem is that for a conventional 4-1 exhaust header, the separation between two firing (or exhaust) impulses is 90 crank degrees in each collector versus 180 crank degrees for a flat crank engine.This gives the engine that inherent “American V-8” exhaust burble, but also causes a “crowded” condition in the collector when two exhaust pulses, separated by only 90 crank degrees are trying to exit through the collector.To accommodate this, the collector for a 90-degree crank motor must be larger than for an “all-other-things-being-equal” flat-crank motor, thereby losing some low and mid-range torque.The “bundle of snakes” design collects two tubes from each bank into a single 4-1 collector resulting in four evenly spaced exhaust pulses as in the flat-crank header design.A broad power band is inherent to the 180 degree header design due to the smaller collector size. This was a great idea, and I am sure contributed to the success of the GT40 “back-in-the-day.”
Boss330 is offline  
post #40 of 68 Old 27th June 2011, 12:44 AM Thread Starter
Gustav
Administrator
 
Gustav's Avatar
 
Join Date: Mar 2000
Location: Kingdom of Sweden
Age: 39
Posts: 49,474
Blog Entries: 7
Thanks: 5,951
Thanked 3,786 Times in 2,285 Posts
"First of all, the turbo plumbing both on the intake and exhaust side have been significantly enlarged relative to the previously seen S63 such that engine breathing has been improved and back pressure has been reduced. The cross cylinder bank headers have themselves been increased in diameter for better breathing. The intercoolers are much larger and more pronounced under the hood. Boost pressure has been raised from 1.3 to 1.6 bar.
The valvetronic system has been heavily tuned and modified for the M5 such that turbo lag has been further reduced, and efficiency has been improved. On the test bench at full load the M5 engine shows a 30% improvement in efficiency over the S63 found in the X M cars while making the same power output."


BMWBLOG Tech Anaylsis: Under the Skin of BMW's New M5
Gustav is offline  
Reply

Bookmarks

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the BMW M5 Forum and M6 Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes Rate This Thread
Linear Mode Linear Mode
Rate This Thread:



Similar Threads
Thread Thread Starter Forum Replies Last Post
Lovely picture of the BMW M5 E34 straight six engine Dan Kelly Owners Gallery 3 10th November 2009 07:03 AM
Lovely picture of the BMW M5 E34 straight six engine Dan Kelly E34 M5 Discussion 8 29th October 2009 11:22 AM
Member MRM5 gorgeous engine picture: V10 M Power in the night Gustav E60 M5 and E61 M5 Touring Discussion 12 22nd March 2009 03:29 PM
Differences between D2 and D3 engine Yaninnya ALPINABoard.com | BMW Alpina Discussion 4 25th October 2007 09:33 PM
M5 (E34) engine types 3.5 / 3.6 / 3.8 differences oldtimerfan E34 M5 Discussion 2 2nd June 2001 03:44 PM

Posting Rules  
You may post new threads
You may 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome