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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 01-11-2015, 04:40 PM
Bmwe39540 Bmwe39540 is offline
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BMW 540i dinan upgrade hp gain

Hey everyone,

So I want to eventually modify the engine in my 540i. I want to put in the dinan exhaust and stage 2 software with the cold air intake, cam you notice the difference in power with those mods? How much horsepower will it have with the mods? And the stock exhaust on the 540i is fine if your retired, going to the golf course everyday but im a 16 year old kid that loves the sound of a v8, and is the dinan exhaust pretty loud just the way it is as a slip on? Or should I guy straight pipe it. Finally is the dinan transmission chip for the automatic or standard?
Thanks
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  #2  
Old 01-11-2015, 04:48 PM
uncmozo uncmozo is offline
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Can you actually chip a standard tranny?
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  #3  
Old 01-11-2015, 04:55 PM
Bmwe39540 Bmwe39540 is offline
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Well dinan has a tranny chip, I doubt it's for manual but I don't know
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  #4  
Old 01-11-2015, 05:40 PM
777-300ER 777-300ER is offline
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The transmission chip is for the automatic as manuals don't govern themselves with electronics.
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  #5  
Old 01-11-2015, 05:51 PM
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Dking078 Dking078 is online now
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Save your $$ and keep the stock intake since it is a CAI already (depending who you ask). As for muffler, bypass the DINAN mark up and get a nice magnaflow. They sound very nice You can either eliminate the rear mufflers and replace with aftermarket or take out the Y resonator too.

If you have an Auto, the DINAN tran SW is okay at best. I didn't notice firmer shifts, but like the no-forced-shift.

Horsepower gain, probably some, but nothing extravagant.
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  #6  
Old 01-11-2015, 06:33 PM
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matt540 matt540 is online now
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The software for the transmission makes the shifts hold longer in sport and shift quicker. The exhaust has a nice tone, but it sounds better without the resonator. The CAI is risky if you live in an area that rains. Not much power is gained with these mods.

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Dinan F&R strut tower brace, M5 F&R sway bars, Koni Sports, Eibach springs, Powerflex polyurethane bushings, Dinan stage 2 engine software, Stage 1 trans software, Zionsville cooling kit, resonator delete, Dinan exhaust, Dinan throttle body, AFE cai, 18' style 5's, 235/40/18 275/35/18, Ultimate cup holders, rear cup holder delete/coin holder, Hella taillights, clear sides, Depo AE, M5 lip spoiler,

Last edited by matt540; 01-11-2015 at 07:43 PM.
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  #7  
Old 01-11-2015, 07:28 PM
Bmwe39540 Bmwe39540 is offline
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Alright thanks guys, what all does the engine software do? Like stage 2? And what else can a guy do to get more power
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  #8  
Old 01-11-2015, 07:38 PM
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matt540 matt540 is online now
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Stage 1 raises the rpm to 6250, and maybe opens up 8hp/9 ft-lb of torque. To get more power you can supercharge or do nitrous. There are tons of threads about how to get more power in these cars. Do a search and you will find all the information you can imagine. Your best bet is to take a couple classes at a race track and learn how to drive it to its full potential. Its something I plan on doing this summer.

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Dinan F&R strut tower brace, M5 F&R sway bars, Koni Sports, Eibach springs, Powerflex polyurethane bushings, Dinan stage 2 engine software, Stage 1 trans software, Zionsville cooling kit, resonator delete, Dinan exhaust, Dinan throttle body, AFE cai, 18' style 5's, 235/40/18 275/35/18, Ultimate cup holders, rear cup holder delete/coin holder, Hella taillights, clear sides, Depo AE, M5 lip spoiler,

Last edited by matt540; 01-11-2015 at 07:41 PM.
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  #9  
Old 01-11-2015, 07:39 PM
JimLev JimLev is online now
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More power that you can actually feel? Only 2 ways, supercharger or nitrous for some real gains.
All the rest won't do that much, maybe 20HP. headers ~$3K, cams, about the same. This isn't a SB Chevy.
Dinan stage 1 engine software will bump up the over rev limit, make the throttle body open up quicker when you floor it, remove the top speed limit, and make a small change in the air/fuel mixture.
Probably not worth the $500 they want for it, sometimes there are 1/2 price sales in the winter.
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  #10  
Old 01-11-2015, 08:50 PM
MKJS MKJS is online now
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Quicker throttle body would be a big improvement for my car. I've found late throttle very difficult, when I need it, it just isn't there, but it'll be home later. In a straight line, not so bad, but in a corner, when you need it, you need it.

doc
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  #11  
Old 01-11-2015, 08:58 PM
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Even though it was an arm and a left nut, the throttle body was an awesome improvement mixed with the stage 2 software. It makes throttle response much more snappy and predictable. I got it on one of Dinan's sales for around $649. Cant wait to take it to the track this summer and give her some good exercise.

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Dinan F&R strut tower brace, M5 F&R sway bars, Koni Sports, Eibach springs, Powerflex polyurethane bushings, Dinan stage 2 engine software, Stage 1 trans software, Zionsville cooling kit, resonator delete, Dinan exhaust, Dinan throttle body, AFE cai, 18' style 5's, 235/40/18 275/35/18, Ultimate cup holders, rear cup holder delete/coin holder, Hella taillights, clear sides, Depo AE, M5 lip spoiler,
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Old 01-11-2015, 09:12 PM
MKJS MKJS is online now
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What is it, a modified throttle body? Wonder what they do to it to make it more responsive? Or is it a computer upgrade?
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  #13  
Old 01-11-2015, 09:17 PM
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It has a larger polished bore allowing more air to enter the intake manifold, more smoothly and quicker. The stage 2 software is to adjust the air fuel mixture to get the most efficiency out of the upgrade.

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Dinan F&R strut tower brace, M5 F&R sway bars, Koni Sports, Eibach springs, Powerflex polyurethane bushings, Dinan stage 2 engine software, Stage 1 trans software, Zionsville cooling kit, resonator delete, Dinan exhaust, Dinan throttle body, AFE cai, 18' style 5's, 235/40/18 275/35/18, Ultimate cup holders, rear cup holder delete/coin holder, Hella taillights, clear sides, Depo AE, M5 lip spoiler,
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  #14  
Old 01-11-2015, 09:21 PM
MKJS MKJS is online now
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Seem there might be some additional mods to make it open faster, some kind of spring or pressure alteration. Bmw might have even tried to slow down the throttle response for some perceived safety reason like the under steer they build in. This is a big reason I'm not a fan of fly by wire. I like things that the computer doesn't think I should have.

I wouldn't mind having a B46.
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Last edited by MKJS; 01-11-2015 at 09:31 PM.
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  #15  
Old 01-11-2015, 09:27 PM
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Maybe that is done with the software, it is drive by wire. Maybe it is a possibility, I never asked that. That is something ill have to ask the Dinan Parts tech.

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Dinan F&R strut tower brace, M5 F&R sway bars, Koni Sports, Eibach springs, Powerflex polyurethane bushings, Dinan stage 2 engine software, Stage 1 trans software, Zionsville cooling kit, resonator delete, Dinan exhaust, Dinan throttle body, AFE cai, 18' style 5's, 235/40/18 275/35/18, Ultimate cup holders, rear cup holder delete/coin holder, Hella taillights, clear sides, Depo AE, M5 lip spoiler,
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Old 01-11-2015, 09:35 PM
MKJS MKJS is online now
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Cool, love to hear about it if you find anything out. I suspect there is something governing the speed of throttle response other than the size of the butterfly/bore.
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  #17  
Old 01-11-2015, 10:21 PM
Bmwe39540 Bmwe39540 is offline
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Quote:
Originally Posted by matt540 View Post
The software for the transmission makes the shifts hold longer in sport and shift quicker. The exhaust has a nice tone, but it sounds better without the resonator. The CAI is risky if you live in an area that rains. Not much power is gained with these mods.

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I like what you have done to your car.. How much horsepower do you think yours has now?
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  #18  
Old 01-12-2015, 04:52 AM
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Quote:
Originally Posted by Bmwe39540 View Post
I like what you have done to your car.. How much horsepower do you think yours has now?
Taking a wild guess with my butt dyno I would say around 320hp and 340 ft-lb. It may be optomistic though. I will never know unless I get it dynoed for real. It handles great, and im sure when I go on the track it will use most of its power. ILt has tons of grip when I have the sunner set of wheels on.
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Dinan F&R strut tower brace, M5 F&R sway bars, Koni Sports, Eibach springs, Powerflex polyurethane bushings, Dinan stage 2 engine software, Stage 1 trans software, Zionsville cooling kit, resonator delete, Dinan exhaust, Dinan throttle body, AFE cai, 18' style 5's, 235/40/18 275/35/18, Ultimate cup holders, rear cup holder delete/coin holder, Hella taillights, clear sides, Depo AE, M5 lip spoiler,

Last edited by matt540; 01-12-2015 at 04:55 AM.
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  #19  
Old 01-12-2015, 05:07 AM
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Originally Posted by MKJS View Post
Cool, love to hear about it if you find anything out. I suspect there is something governing the speed of throttle response other than the size of the butterfly/bore.
More thean likely it goverened by human reaction time.

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Old 01-12-2015, 05:11 AM
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What kind of track event do you plan on doing? I took my M5 (when I had it) to an SCAA autocross a few times. The track was a bit small for such a heavy car tho.
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  #21  
Old 01-12-2015, 08:41 AM
MKJS MKJS is online now
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More thean likely it goverened by human reaction time.

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Not a newbe to race cars after racing a 250 CZ motocross bike for 3 years. Nothing wrong with my reaction time but I can't say as much for the 540.

Use to have a 500 hp big block Camaro, now there was some throttle response! You could hang the rear end exactly where you wanted it with just a little nudge of the gas.

doc
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  #22  
Old 01-12-2015, 10:15 AM
plmadding01e39 plmadding01e39 is offline
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The Dinan muffler sounds perfect. I have the Dinan CAI as well. It is nearly silent at speed, but when you get on the throttle you hear it for sure! I get compliments all the time on the sound.

It sounds great, and doesn't wake up your neighbors like removing the mufflers would. My dad used to have a 1963 Chevy pickup that was loud enough my neighbor reported that it shook some things off a shelf in her house...that's just obnoxious.
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  #23  
Old 01-12-2015, 10:25 PM
Bmwe39540 Bmwe39540 is offline
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What's dinan cai? Sorry for the dumb questions to some, I'm a airplane guy and all I know about the 540i is its my first car and it's my favorite car of all time, the e39 chassis. lol I know what abnoxious is, I have a victory motorcycle with straight pipes, and I'm putting a 4 into 1 pipe on my 1979 kawasaki kz1000 that's gonna be loud. I really want my car to have a nice growl when it's idiling and to be loud when your on the throttle, so it turns heads but not enough to piss of the cops.
Trevor
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  #24  
Old 01-12-2015, 10:30 PM
plmadding01e39 plmadding01e39 is offline
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CAI stands for Cold Air Intake. Everyone has to learn
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  #25  
Old 01-12-2015, 10:36 PM
Bmwe39540 Bmwe39540 is offline
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Lol well that was obvious hahaha now is yours just slip on? Like no y resonators or straight pipes, Judy stock off, dinan in? Have a video of what it sounds like?
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