Z3MCoupe.com Forums

Go Back   Z3MCoupe.com Forums > M Coupé Technical > Technical Discussion
HOME Gallery Register Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Display Modes
  #21  
Old 05-10-2010, 06:57 PM
Jonttt's Avatar
Jonttt Jonttt is offline
Senior Member
 
Join Date: Jul 2009
Location: Liverpool
Posts: 1,213
Default

Logic says with an open filter you can only be sucking in warmer air than with the OEM box in place which would make a significant difference to performance but I've never actually tried one.

Thats why I like the Simota's/GruppeM's for the S50's as the carbon cone was such a good/close fit there was no change of warm engine air getting sucked in with the pressure from the intake.
__________________
VIDEO or Journal
Reply With Quote
  #22  
Old 05-10-2010, 07:01 PM
exdos's Avatar
exdos exdos is offline
Senior Member
 
Join Date: Aug 2003
Posts: 4,819
Default

Quote:
Originally Posted by Jonttt View Post
Logic says with an open filter you can only be sucking in warmer air than with the OEM box in place which would make a significant difference to performance but I've never actually tried one.

Thats why I like the Simota's/GruppeM's for the S50's as the carbon cone was such a good/close fit there was no change of warm engine air getting sucked in with the pressure from the intake.
With the MC/MR's OEM air intake not only is cold air from outside the engine bay being delivered, but also air at increasing pressure with increasing speed (i.e greater mass) = more power. You won't capitalise on this with aftermarket systems.
__________________
/// Exdos ///
"Men who try the impossible and fail spectacularly are infinitely superior to those who reach for nothing and succeed" --Napoleon Bonapart
Reply With Quote
  #23  
Old 07-10-2010, 12:33 PM
shantybeater shantybeater is offline
Senior Member
 
Join Date: Jun 2009
Posts: 427
Default

Worth a read chaps:

http://forums.bimmerforums.com/forum....php?t=1535784

especially (although it relates to an E46 M3):

http://www.powerchipgroup.com/stealth/e46m3.doc
__________________
Reply With Quote
  #24  
Old 07-10-2010, 01:23 PM
exdos's Avatar
exdos exdos is offline
Senior Member
 
Join Date: Aug 2003
Posts: 4,819
Default

Quote:
Originally Posted by shantybeater View Post
Worth a read chaps:
especially (although it relates to an E46 M3):

http://www.powerchipgroup.com/stealth/e46m3.doc
If the author of the work you refer to had used a datalogger connected to the ECU (several to choose from) and performed his comparative tests on the road in "real world" conditions rather than on a dynamometer, the results would be useful, but comparisons of BMW "ram-air" intake systems, as used on the Z3 M, Z4 M, E46 M3 and E92 M3 to aftermarket "open" systems, are meaningless because the fans placed in front of cars on static dynamometers don't replicate the conditions of air movement and changing air pressures on the road. As such the OEM air-intake systems are disadvantaged because they are not functioning as they normally do, when on a dynamometer.

Where do you live? If you live anywhere near me, I'll offer to connect your car to my datalogger and do some recording from your cars ECU to show you exactly what is going on in your car. You'll be amazed by the information you'll get from your car!
__________________
/// Exdos ///
"Men who try the impossible and fail spectacularly are infinitely superior to those who reach for nothing and succeed" --Napoleon Bonapart
Reply With Quote
  #25  
Old 07-10-2010, 04:55 PM
shantybeater shantybeater is offline
Senior Member
 
Join Date: Jun 2009
Posts: 427
Default

I'm in bournemouth, that does sound interesting!
__________________
Reply With Quote
  #26  
Old 07-10-2010, 05:48 PM
steve1 steve1 is offline
Senior Member
 
Join Date: Aug 2004
Posts: 1,060
Default

Quote:
Originally Posted by shantybeater View Post
I'm in bournemouth, that does sound interesting!
Is it true that the shops there have bi-focal windows
__________________
2002 phoenix yellow. "V3RY M" lives on, but on another beast.
Reply With Quote
  #27  
Old 07-10-2010, 05:52 PM
exdos's Avatar
exdos exdos is offline
Senior Member
 
Join Date: Aug 2003
Posts: 4,819
Default

Quote:
Originally Posted by shantybeater View Post
I'm in bournemouth, that does sound interesting!
I'm midlands.
__________________
/// Exdos ///
"Men who try the impossible and fail spectacularly are infinitely superior to those who reach for nothing and succeed" --Napoleon Bonapart
Reply With Quote
  #28  
Old 07-10-2010, 06:02 PM
shantybeater shantybeater is offline
Senior Member
 
Join Date: Jun 2009
Posts: 427
Default

Steve1 - I'm guessing you havent been here for a while? all the old timers moved along the coast some time ago! ;)

exdos - thats a shame mate, maybe we will bump into each other at a show or something
__________________

Last edited by shantybeater; 07-10-2010 at 06:05 PM.
Reply With Quote
  #29  
Old 09-10-2010, 02:50 PM
DougW DougW is offline
Member
 
Join Date: Jun 2010
Location: Bristol
Posts: 87
Default Air Intake, etc.

I have run a Gruppe M intake (Evole sale them just short of £600) with a Unichip & remap carried out by Paul Sheppard at Circuit Motors (next to Castle Combe Circuit) for the last 18 months, its dyno reading is 346 BHP with improved torque over standard too, the car has done 105k. I only use the car for track use & the differance after these modifications was huge - however i only had these mods carried out after making sure the valve clearances were correct - this should be done at inspection II services, but some dealers are better than others at this task! Dick Lovetts BMW in Bristol carried out this work & the car was massively improved in terms of performance following their work. I have recently fitted de-cat Supersprint pipes & Supersprint back boxes and blanked off the air intake from the N/S brake duct & instead have taken the air feed straight through the front bumper just below & to the centre of the N/S headlamp washer jet. After this i have taken the car around Silverstone (BMW owbers club trackday) & found a 'large' flat spot between 3k & 4K rpm. The car is booked in for a re-map again on Tuesday 19th by which time i will have removed the air con compressor & associated parts, hopefully i will see somewhere in the region of 355 BHP - I'll let you know.
Reply With Quote
  #30  
Old 10-10-2010, 10:26 PM
coupe fan coupe fan is offline
Super Moderator
 
Join Date: May 2004
Location: richmond, surrey
Posts: 2,819
Default

Sounds like you are getting well on top of the tuning/mapping issue. Keep us informed.
__________________
Strongstrut CL front brace-Yellowstuff pads/Castrol SRF race brake fluid-Rogue top mounts/Rear support bushes-H&R ARBs-Whiteline droplinks-Bilstein Sport shockers-H&R Springs-Black Halo Angel Eye headlight units-Sachs lightweight flywheel/matching clutch-Supersprint exhaust/race catalysers-BBS RSGTs with Falkens-K&N High Flow Air Filter-Recaro Pole Position seats - Exdos mod - ACS flippers
Reply With Quote
Reply

Tags
airbox

Thread Tools
Display Modes

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

Forum Jump


All times are GMT. The time now is 02:23 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2018, vBulletin Solutions, Inc.