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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E39 (1997 - 2003)

E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #26  
Old 07-31-2012, 10:47 AM
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bricas45 bricas45 is offline
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Mein Auto: '01 540i6, '94 325is
Quote:
Originally Posted by eparayno View Post
Great NA numbers Bricas. Goes to show how huge of a bottleneck the stock headers are. M54 guys dyno'd 15-20ish HP increase with just headers, no cats or high flow cats and the stock exhaust piping on the E46. Would you happen to have a side by side pic of the stockers and A1 headers?
Here is a side by side of the a1 headers with stock M5 (540i non-vanos) exhaust manifolds. And a seperate photo of the 540i vanos exhaust manifolds.
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2001 540i - Orient Blue

M5 bumpers, wheels, mirrors
S/C, water/air IC
A1 Headers, Random Technology Cats, Eissenmann Exhaust
3.15 diff, evosport power pullies
Koni Sports, Eibach Springs/Sway Bars

Last edited by bricas45; 07-31-2012 at 01:03 PM.
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  #27  
Old 07-31-2012, 12:33 PM
dunne44 dunne44 is offline
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Mein Auto: 540i6
Quote:
Originally Posted by bricas45 View Post
stock M5 (non-vanos) exhaust manifolds.

Thought m5 had double vanos
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  #28  
Old 07-31-2012, 01:02 PM
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bricas45 bricas45 is offline
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Location: New Hampshire
 
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Mein Auto: '01 540i6, '94 325is
Quote:
Originally Posted by dunne44 View Post

Thought m5 had double vanos
Sorry I mean m5 exhaust which is the same as the 540 non-vanos exhaust. The m5 certainly has vanos haha. Made sense to me at the time when I wrote that. Edited my earlier post
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2001 540i - Orient Blue

M5 bumpers, wheels, mirrors
S/C, water/air IC
A1 Headers, Random Technology Cats, Eissenmann Exhaust
3.15 diff, evosport power pullies
Koni Sports, Eibach Springs/Sway Bars
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  #29  
Old 07-31-2012, 10:46 PM
GreenTiger GreenTiger is offline
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Mein Auto: 7/98 NonVanos 540iA
Quote:
Originally Posted by bricas45 View Post
They were actually made for the M5 but the m62 and s62 have exact external dimensions and share exhaust manifolds with the non-vanos m62. It is a big job to do these and suggest pulling the motor out to make sure you get all bolts tight, may want to do clutch if you have a manual, and the rear main at the same time. Also, they will not directly bolt up to the rest of your exhaust. Exhaust will have to be custom made at the very least a connection from headers to cats.

The car sounds like a pure bread race car with the headers, high flow cats and muffler set up you will not be disappointed. The power increase was dramatic. I think the benefits are far greater for those like mine with vanos...this removes the pre-cats as well.
I know you are in Newhampshire, but do you know if the headers are CA carb certified? Also, what do you mean by 'MAF' as a mod?
In terms of the 100 cell cats, the lower the cell count, the better correct? Which cats did you use and from where?
Thanks
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  #30  
Old 07-31-2012, 11:06 PM
aspensilver540 aspensilver540 is offline
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Mein Auto: 1997 540i
Quote:
Originally Posted by bricas45 View Post
Here is a side by side of the a1 headers with stock M5 (540i non-vanos) exhaust manifolds. And a seperate photo of the 540i vanos exhaust manifolds.
Wow, I didn't know I had that...pretty cool
Nice gains btw, I like how you dyno'd before and after.
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  #31  
Old 08-01-2012, 09:35 AM
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bricas45 bricas45 is offline
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Location: New Hampshire
 
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Mein Auto: '01 540i6, '94 325is
Quote:
Originally Posted by King540i View Post
I know you are in Newhampshire, but do you know if the headers are CA carb certified? Also, what do you mean by 'MAF' as a mod?
In terms of the 100 cell cats, the lower the cell count, the better correct? Which cats did you use and from where?
Thanks
I highly doubt the headers are carb certified. I really have no idea what "carb certified" entails. All my state does for inspection...is hook up an OBD and give the car a visual look over.

The lower the cell the better they flow, but let "catalytic converting" they do. 100 cell barely do anything...any state that hooks a sniffer to your pipe these will not pass. I have random technology 144-30000- 4" diameter body with 3" inlet/outlet racing cats.
The exhaust is a bit smelly.

By modified MAF that is the housing. It is larger and smoother than stock. The sensor itself is the same and unchanged. Doing this absolutely require modifying the ECU to be able to meter correctly.
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2001 540i - Orient Blue

M5 bumpers, wheels, mirrors
S/C, water/air IC
A1 Headers, Random Technology Cats, Eissenmann Exhaust
3.15 diff, evosport power pullies
Koni Sports, Eibach Springs/Sway Bars
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  #32  
Old 08-01-2012, 09:38 AM
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bricas45 bricas45 is offline
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Mein Auto: '01 540i6, '94 325is
Quote:
Originally Posted by aspensilver540 View Post
Wow, I didn't know I had that...pretty cool
Nice gains btw, I like how you dyno'd before and after.
thank you. I am happy I did the before after dyno. I think these gains are far more than would be seen on the non-vanos. As you can see from the photos...the vanos exhaust manifolds are a horrible bottle neck. This is one of the big reasons the non-vanos crowd get higher gains with other mods.
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2001 540i - Orient Blue

M5 bumpers, wheels, mirrors
S/C, water/air IC
A1 Headers, Random Technology Cats, Eissenmann Exhaust
3.15 diff, evosport power pullies
Koni Sports, Eibach Springs/Sway Bars
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  #33  
Old 08-12-2013, 09:50 PM
richardcoelho richardcoelho is offline
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Location: FL
 
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Mein Auto: 2001 BMW 540i M sport
i have 3:15 lsd,AFE intake,Dinan throttle body,m60 manifold,stg 5 dinan software and full exhaust and i put down 289rwhp and 309rwtq in 90 degree weather,WCF puts it at 300rwhp,mustang dyno btw
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  #34  
Old 08-29-2013, 11:06 PM
e39540iv8 e39540iv8 is offline
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Location: Australia
 
Join Date: May 2012
Posts: 141
Mein Auto: 2000 BMW 540iA
Thanks for the reply but I sold the 540i months ago and got an 05 Mercedes-Benz E55 AMG. It's putting down 509whp at the moment, these things are extremely mod friendly. The 540i I had gave me quite alot of trouble so I didn't really miss it. It's probably not because the E39 is bad but the one I bought was. The AMG is down right insane, way too brutal for the road and just vicious. It does handle alot better though and the interior is light years better. All in all I'm really really happy with it.

Thanks to everybody who replied to all my threads and helped me out. This is an awesome forum. Take care guys.
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  #35  
Old 08-30-2013, 03:13 AM
Burning2nd Burning2nd is offline
Under the lift arms
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Mein Auto: E39 540, E36 328is, E83x3
Good luck with the amg... just you wait....
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