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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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  #1  
Old 07-06-2016, 09:41 AM
carls540i carls540i is offline
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Location: atlanta
 
Join Date: Jul 2014
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Mein Auto: BMW 540i
1995-1998 intake manifold Swap

Hey all,
I have an 02 540i which runs and I was looking to get some more HP. I added an AFE intake, had it chip tuned but I was told if I swapped out my current intake manifold for an older version I could get increase HP. Is this true and if so, roughly how much HP would I be looking at? Doesn't make sense to go thru the trouble if I'm only going to get 10hp or so.

thanks!
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  #2  
Old 07-06-2016, 09:52 AM
MKJS MKJS is online now
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Location: Texas
 
Join Date: Mar 2014
Posts: 2,503
Mein Auto: '99 540i
You will add top hp, not all that much given the current setup, and you will lose bottom end. Personally, I like the bottom end power and don't use the top of the rpm range all that much. Cruse at 100 is only bout 3.5k, and that is a pretty good speed for my car.

I find occasion to ring it up to 5.5K, but not all that often and being that it is an old, pretty heavy car with an auto trans, I try and take it easy on it to save on parts replacement.

Really, to take advantage of the larger runners of the older m62's, a larger throttle body, bigger injectors, headers and flow through cats and exhaust is needed. Without all the additional I think you will hurt bottom end more than you will increase top end hp, IMO.

Jim

Last edited by MKJS; 07-06-2016 at 11:29 AM.
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  #3  
Old 07-06-2016, 01:42 PM
carls540i carls540i is offline
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Location: atlanta
 
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Mein Auto: BMW 540i
Agreed! I like my bottom end speed too!! Well...scrap that idea! lol thanks!
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