|
29th February 2008, 10:53
|
#1 (permalink)
|
|
Member, Sport: Off DSC: On (>50 posts)
Join Date: Mar 2007
Location: San Rafael, CA
Posts: 100
Thanks: 1
Thanked 3 Times in 2 Posts
|
Do BMC Drop In Filters really increase HP?
I see a lot of fellow members have changed their filters to the BMC, but I am curious if there are real world horsepower gains? Have there been verified increases via dyno runs?
I currently have the Evo pulley, removed my charcoal filters and RPI scoops. I know $150 is not a big deal, but I don't want to change the air filters just for the sake of doing it because the retailers say they increase power.
Are there any horsepower gains from this mod alone?
James
|
|
|
|
29th February 2008, 11:03
|
#2 (permalink)
|
|
Company Representative of RPI Power
Join Date: Jan 2006
Location: RPV
Posts: 2,078
Thanks: 11
Thanked 173 Times in 102 Posts
|
Yes and no.
You gain very little if any peak hp.
However, there's a reasonably substantial gain through the middle of the curve where it really counts.
|
|
|
|
|
29th February 2008, 11:46
|
#3 (permalink)
|
|
Member, Sport: On DSC: On (>100 posts)
Join Date: Oct 2006
Location: Toronto
Posts: 157
Thanks: 1
Thanked 0 Times in 0 Posts
|
Cool... Anyone carry them in stock in Toronto?? I always wanna get them...
hmm.. If any asked the same Question.. I'm sorry. I am buzz. now..... lol
__________________
  / 
2006 June production
Silver Grey/ Black on Black with Aluminum Shadow
Exclusive Package/ Head-up display
|
|
|
|
|
29th February 2008, 18:54
|
#4 (permalink)
|
|
Member, Sport: On DSC: On (>100 posts)
Join Date: May 2007
Location: Montreal
Posts: 112
Thanks: 0
Thanked 0 Times in 0 Posts
|
Quote:
Originally Posted by JosM5
Cool... Anyone carry them in stock in Toronto?? I always wanna get them...
hmm.. If any asked the same Question.. I'm sorry. I am buzz. now..... lol
|
I don't think you'll find stock in Canada.....ordered mine directly from BMC and everything came through without a hitch.....they seem to be very organized and know how to ship things internationally.....
__________________
2008 M5 Space Grey Metallic/Full Merino Black
2004 SL500 Capri Blue Metallic/Beige
1997 Porsche 993 Cabriolet Silver/Blue Roof/Blue Interior
2007 Siena XLE AWD Limited Gold/Beige Leather (To carry the kids)
Last edited by volks99; 29th February 2008 at 18:55.
|
|
|
|
|
1st March 2008, 06:56
|
#5 (permalink)
|
|
Member, Sport: On DSC: On (>100 posts)
Join Date: Oct 2006
Location: Toronto
Posts: 157
Thanks: 1
Thanked 0 Times in 0 Posts
|
Thanks for the infor..
__________________
/
2006 June production
Silver Grey/ Black on Black with Aluminum Shadow
Exclusive Package/ Head-up display
|
|
|
|
|
21st April 2008, 15:44
|
#6 (permalink)
|
|
Member, Sport: Off DSC: On (>50 posts)
Join Date: Apr 2008
Location: Kingdom of Bahrain
Posts: 59
Thanks: 3
Thanked 9 Times in 5 Posts
|
cant wait to get mine.
|
|
|
|
|
21st April 2008, 17:53
|
#7 (permalink)
|
|
Addicted Member (>300 posts)
Join Date: Mar 2008
Location: Dallas, Texas
Posts: 323
Thanks: 16
Thanked 8 Times in 7 Posts
|
nice I'll have to post up my dyno graphs as soon as I get a chance to dyno again this week.
|
|
|
|
|
21st April 2008, 20:51
|
#8 (permalink)
|
|
Fellow Member (>400)
Join Date: Jul 2004
Location: San Diego
Posts: 485
Thanks: 31
Thanked 14 Times in 10 Posts
|
Yes.
__________________
2006 M5 Interlagos Blue / Black / Aluminum / SMG
-carbon filter delete / bmw ipod kit / evosport crank pulley / angel-i-bright / Dinan stage 2 suspension / BBS RGR 19*9 19*10 w/PS2 / Dinan 3.91 / BMC air filters / Dinan muffler / RPI intakes / Dinan camber-caster plates / Dinan monoballs
|
|
|
|
|
21st April 2008, 22:52
|
#9 (permalink)
|
|
m5board.comoholic (>1000 posts)
Join Date: Mar 2007
Location: So Cal
Posts: 1,357
Thanks: 280
Thanked 174 Times in 106 Posts
|
What Gabe presented is accurate. Due to emissions requirements, the air flow is somewhat restricted under stock conditions to meet what ever bench marks they need to achieve. This can be tied to the Air to Fuel ratio.
If you look at the OEM and a BMC filter side by side you will conclude better air flow with the BMC (or similar type). The point behind the scoops is redirect dedicated air flow to the intake. The purpose of the filters is to filter out particles and debris while allowing the necessary air flow for the fuel mix. But it can strangle the air flow also. This can affect your A/F ratio. You would not recognize the full potential of the Air Scoops or any air injection with the stock filters. In my unprofessional opinion! 
__________________
________________________
Mike 
'08 M5, SMG - Black Sapphire / Black Merino
'07 X5 3.0si - Jet Black / Tobacco Napa Leather
'04 M3 Conv, SMG - Jet Black / Black Merino (Gone 9/11/07  )
'04 Mini 'S' - Dark Silver/White Top, (mucho mods)
'86 Porsche 951 -White (Son's money pit)
Past Rides (worth mentioning)
'98 M3 -Titanium Silver /Black Merino -Sold
|
|
|
|
|
22nd April 2008, 16:00
|
#10 (permalink)
|
|
Member, Sport: On DSC: Off
Join Date: Nov 2007
Location: Houston
Posts: 262
Thanks: 27
Thanked 25 Times in 21 Posts
|
Gabe,
Is this a Dyno with Eisenman Section 1 race pipes (cat delete)?
I also did a section 1 cat delete (with BMC Filters and scoop) and wanted to know if those are the hp/tq curves I should expect.
Thanks
__________________
Mods:
Exhaust: Evosport Section 1 Race Pipes + Sport Muffler
Engine: RPI Scoops, BMC Filters, Charcoal Filter Removal, RPI Pulleys
Suspension: H&R Springs
MIscellaneous: Beltronics RX65 Radar detector hardwired.
Last edited by kwan; 22nd April 2008 at 16:03.
|
|
|
|
|
22nd April 2008, 22:38
|
#11 (permalink)
|
|
Company Representative of RPI Power
Join Date: Jan 2006
Location: RPV
Posts: 2,078
Thanks: 11
Thanked 173 Times in 102 Posts
|
This dyno is with the Eisenhaus/Meisterschaft section 1. I mislabeled it Eisenmann, since this was done before the *ahem* new info came out. Yes, it is a secondary cat delete section.
In terms of if you should expect these hp/torque curves, I'd say yes and no. In general, I would assume you would see the same general increases. However, your fuel is a bit different out there, so that may contribute the some minor differences in the curves. Also, if there is a difference in the piping diameter (I'm not sure, I haven't played around with the Evosport ones), that may change things as well. Either way though, the differences between the changes in HP/Torque curves experienced in your setup and the ones shown above should be relatively minor.
|
|
|
| | |
